This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the

Dee Estuary The Dee Estuary ( cy, Aber Dyfrdwy) is a large estuary by means of which the River Dee flows into Liverpool Bay. The estuary starts near Shotton after a five-mile (8 km) 'canalised' section and the river soon swells to be several miles ...

to the M48 Bridge that separates the estuary of the

River Wye The River Wye (; cy, Afon Gwy ) is the Longest rivers of the United Kingdom, fourth-longest river in the UK, stretching some from its source on Plynlimon in mid Wales to the Severn estuary. For much of its length the river forms part of Wal ...

from the

River Severn , name_etymology = , image = SevernFromCastleCB.JPG , image_size = 288 , image_caption = The river seen from Shrewsbury Castle , map = RiverSevernMap.jpg , map_size = 288 , map_c ...

Tributaries A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage b ...

are listed down the page in an upstream direction, starting with those closest to the sea. The

main stem In hydrology, a mainstem (or trunk) is "the primary downstream segment of a river, as contrasted to its tributaries". Water enters the mainstem from the river's drainage basin, the land area through which the mainstem and its tributaries flow.. A ...

(or principal) river of a catchment is given, left-bank tributaries are indicated by (L), and right-bank tributaries by (R). Note that, in general usage, the 'left (or right) bank of a river' refers to the left (or right) hand bank as seen when looking downstream. Where a named river is formed by the confluence of two differently named rivers, these are labelled as (Ls) and (Rs) for the left and right forks. A prime example is the formation of the

River Taff The River Taff ( cy, Afon Taf) is a river in Wales. It rises as two rivers in the Brecon Beacons; the Taf Fechan (''little Taff'') and the Taf Fawr (''great Taff'') before becoming one just north of Merthyr Tydfil. Its confluence with the R ...

from the Taf Fawr and the Taf Fechan at

Cefn Coed-y-cymmer Cefn-coed-y-cymmer () is a small community on the northwestern edge of Merthyr Tydfil County Borough in Wales. It is situated in the neck of land between the rivers Taf Fawr and Taf Fechan at their confluence (Welsh: 'cymer'). The village lies ...

. The list includes more or less every watercourse named on

Ordnance Survey , nativename_a = , nativename_r = , logo = Ordnance Survey 2015 Logo.svg , logo_width = 240px , logo_caption = , seal = , seal_width = , seal_caption = , picture = , picture_width = , picture_caption = , formed = , preceding1 = , di ...

mapping and thus many of the main rivers of

Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...

(as defined by Natural Resources Wales ). Difficulties arise otherwise in determining what should and what should not be included. Certain names are encountered frequently and particular care should be taken to differentiate between the various occurrences of Clydach, Clywedog and of Dulas for example as well as those whose names refer perhaps to the colour of their waters e.g. Afon ''Goch'' (''red'' river), Afon ''Ddu'' (''black/dark'' river) and Afon ''Wen'' (''white/light'' river).

Mainland rivers flowing into Liverpool Bay

''From

Garth Pier Garth Pier is a Grade II listed structure in Bangor, Gwynedd, Wales. At in length, it is the second-longest pier in Wales, and the ninth longest in the British Isles. Construction Designed by J.J. Webster of Westminster, London, the pier has ...

Bangor, Gwynedd Bangor (; ) is a cathedral city and community A community is a social unit (a group of living things) with commonality such as place, norms, religion, values, customs, or identity. Communities may share a sense of place situated ...

Dee catchment

* River Dee, Wales (Afon Dyfrdwy) ** Nant-y-fflint (L) (flows into

) ** Wepre Brook (L) (flows into Dee Estuary) ** Aldford Brook (R) (wholly in England) **

River Alyn The River Alyn ( cy, Afon Alun) is a tributary of the River Dee, in north-east Wales. The River Alyn rises at the southern end of the Clwydian hills and the Alyn Valley forms part of the Clwydian Range and Dee Valley Area of Outstanding Nat ...

(L) (Afon Alun / River Alun) ***

River Cegidog The River Cegidog () is a river in north-east Wales. It flows mainly through Flintshire but towards the end of its course it forms the border between Flintshire and Wrexham County Borough. Its source lies in the hills of southernmost Flintshire ...

(R) (Afon Cegidog) ****

Nant-y-Ffrith Nant-y-Ffrith refers to a stream and the wooded valley through which it flows on the border between Flintshire and Wrexham County Borough in Wales. The stream begins in moorland to the east of Llandegla. It passes Bwlchgwyn village before ente ...

(R) *** River Terrig (R) (Afon Terrig) ** Worthenbury Brook (R) *** Emral Brook (Ls) *** Wych Brook (Rs) (formerly known as the "River Elfe") ****

Red Brook Red Brook is a minor river in Greater Manchester in North West England. Rising at the confluence of Caldwell Brook and Sinderland Brook at Covershaw Bridge near Sinderland Green, the river runs north west towards Partington, where it runs into ...

(L) ** River Clywedog (L) (Afon Clywedog) *** River Gwenfro (L) (Afon Gwenfro) *** Glanyrafon Brook (R) **** Black Brook (R) (Afon Ddu) ** Shell Brook (R) **

River Ceiriog The River Ceiriog ( cy, Afon Ceiriog) is an long river in north east Wales, whose name may derive from a term meaning "favoured one". It is a tributary of the River Dee. It rises at an altitude of around on the south east slopes of Moel Ffern ...

(R) (Afon Ceiriog) (head of river is Ceiriog Ddu) ***

River Teirw A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...

(L) (Afon Teirw) *** Nant Sarffle (R) *** Nant Cwm-y-geifr (R) *** Nant Cwm-llawenog (R) *** Nant Rhydwilym (R) ** River Eitha (L) (Afon Eitha) ** Eglwyseg River (L) ** Afon Morwynion (L) **

River Alwen A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...

(L) (Afon Alwen) ***

Afon Ceirw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** Merddwr (R) (known as Nant Lleidiog upstream) ****

Afon Medrad This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** Afon Brenig (L) **

Afon Trystion This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Llynor This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Ceidiog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Hirnant (R) **

Afon Tryweryn The Tryweryn is a river in the north of Wales which starts at Llyn Tryweryn in the Snowdonia National Park and after joins the river Dee at Bala. One of the main tributaries of the Dee, it was dammed in 1965 to form Llyn Celyn, drowning the ...

(L) (River Tryweryn) ***

Afon Mynach (Dee) The Afon Mynach ( en, River Mynach) is a small river in Ceredigion, Wales. Its source is at the meeting of two smaller rivers, the Nant Rhuddnant and the Afon Merin. Both of these streams have their sources in lakes high on the Cambrian Mountain ...

(L) *** Afon Hesgyn (L) ***

Afon Gelyn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) (flows into

Llyn Celyn Llyn Celyn () is a reservoir constructed between 1960 and 1965 in the valley of the River Tryweryn in Gwynedd, Wales. It measures roughly long by wide, and has a maximum depth of . It has the capacity to hold of water. It was originally ...

) *** Nant Aberderfel (R) (flows into Llyn Celyn) **

Afon Llafar : ''For the river which flows into Bala Lake see Afon Llafar (Dee)'' Afon Llafar is a river in the Carneddau, Snowdonia. It rises where many streams flow down the slopes of Yr Elen, Carnedd Llewelyn and Carnedd Dafydd to join together in the va ...

(L) (flows into Bala Lake) ** Afon Twrch (R) ** Afon Lliw (L)

Clwyd catchment

River Clwyd The River Clwyd (Welsh: ''Afon Clwyd'') is a river in Wales that rises in the Clocaenog Forest () northwest of Corwen. Its total length is . It flows due south until, at Melin-y-wig, it veers north-eastwards, tracking the A494 and passing t ...

(Afon Clwyd) **

Afon Gele This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

River Elwy The River Elwy (''Afon Elwy'' in Welsh) is a river in Wales forming a tributary to the River Clwyd. The source of the river is sometimes said to be on the northern flank of Moel Seisiog, south-east of Llanrwst, at Ordnance Survey grid reference S ...

(L) (Afon Elwy)(Also known as Afon Cledwen above the village of Llangernyw) ***

Afon Meirchion This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ***

River Aled The River Aled, a small river near Conwy County Borough, flows into River Elwy. The river originates at Llyn Aled on Mynydd Hiraethog to the right of the village Llansannan. It flows through Llyn Aled Isaf and then towards the north through L ...

(R) *** Afon Gallen (Ls) ** River Wheeler (R) (Afon Chwiler) **

Afon Ystrad This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

River Clywedog (Clwyd) The River Clywedog is a river in Wrexham County Borough, Wales. Its uses have been watering crops, powering industrial machinery but is now used as walking trails or geography trips. The river originates to the west of Wrexham, and joins the ...

(L) (Afon Clywedog) (Not to be confused with the Dee tributary of the same name)

Conwy catchment

* River Conwy (Afon Conwy) **

Afon Gyffin The Afon Gyffin ("River Gyffin") is a river in Conwy County Borough. Geography The river runs into the River Conwy close to Conwy Castle. An area of ancient semi-natural woodland exists close to the Afon Gyffin, called Coed Merchlyn. The geo ...

(L) **

Afon Roe The Afon Roe is a small river in Snowdonia in north-west Wales. Its tributary is the Afon Tafolog, which drains the eastern slopes of Drum, a mountain in the Carneddau range. The river flows through the village of Rowen before joining the Riv ...

(L) (known as Afon Tafolog in upper reaches) ** Afon Dulyn (L) ***

Afon Ddu (Welsh for ''black river'') is the name of several rivers in Snowdonia in north-west Wales: * The largest of these flows from Llyn Cowlyd on the south-eastern edge of the Carneddau range to join the river Conwy, passing Pont Dolgarrog on the ...

(L) ***

Afon Garreg-wen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) *** Ffrwd Cerriguniawn (L) *** Afon Melynllyn (R) ** Afon Porth-llwyd (L) ***

Afon Eigiau Afon Eigiau is a small river in the Carneddau mountains in Snowdonia, in north-west Wales, which flows down Cwm Eigiau and into Llyn Eigiau. It is fed by smaller streams which flow down the slopes of neighbouring Foel Grach Foel Grach i ...

(L) ** Afon Crafnant (L) ***

Afon Geirionydd The River Geirionydd (''Afon Geirionydd'' in Welsh) is a river in Snowdonia, North Wales. It is a tributary of the River Crafnant (''Afon Crafnant''), which flows over the Fairy Falls waterfall in Trefriw, and thence on into the River Conwy ( ...

(R) ** Afon Gallt y Gwg (R) ** Nant y Goron (R) **

Afon Llugwy River Llugwy (Welsh: ''Afon Llugwy'') is a tributary of the River Conwy, and has its source at Ffynnon Llugwy, a lake in the Carneddau range of mountains in Snowdonia in north-west Wales. Location and catchment area The average annual rai ...

(L) ***

Nantygwryd Dyffryn Mymbyr is a valley in Snowdonia, in north-west Wales, approximately in length, and leading up from Capel Curig to the Pen-y-Gwryd hotel. The river Nantygwryd, originally called Y Mymbyr in Llywelyn the Great's charter of 1198, starts ...

(R) **

Afon Lledr The ( en, River Lledr, italic=yes) is a river in north-west Wales and the second major tributary of the River Conwy. It is about 10 miles or 16 km long, and flows in a generally easterly direction. The has its source on the eastern slo ...

(L) ***

Afon Wybrnant This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(R) ***

Afon Maesgwm This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstr ...

(R) ***

Afon Ystumiau This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) ** Afon Machno (L) ***

Afon Glasgwm This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Iwrch The Afon Iwrch is a river near Llanrhaeadr-ym-Mochnant in Clwyd, Wales. It is a tributary of the River Tanat and is in length. Its headwaters lie on the eastern slopes of Cadair Berwyn, the highest peak of the Berwyn range, and the river flow ...

(R) **

Afon Eidda This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ** Merddwr (R) **

Afon Caletwr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Serw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R)

Simple coastal catchments

Afon Gyrach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

Afon Glan-sais This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) **

Afon Maes-y-bryn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R)

Aber catchment

* Afon Aber ** Afon Anafon (Rs) **

Afon Rhaeadr Fawr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Ls) ***

Afon Rhaeadr Bach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Ls) ****

Afon Gam This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ***

Afon Goch This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(Rs)

Ogwen catchment

Afon Ogwen ˈ The Afon Ogwen (; ; Welsh, meaning River Ogwen in English) is a river in north-west Wales draining from some of the greatest peaks in Snowdonia before discharging to the sea on the eastern side of Bangor, Gwynedd. Etymology Although the spo ...

Afon Caseg This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) ***

(L) *** Afon Denau (flows into

Llyn Ogwen Llyn Ogwen (; ) is a ribbon lake in north-west Wales. It lies alongside the A5 road between two mountain ranges of Snowdonia, the Carneddau and the Glyderau. Somewhat unusually, the county boundary at this point is drawn so that the lake itsel ...

) **** Nant Gwern y Gof (L) ***

Afon Lloer Afon Lloer is a small river in Snowdonia in north-west Wales. It is the outflow from Ffynnon Lloer, a lake in the Carneddau mountains, and it flows into Llyn Ogwen Llyn Ogwen (; ) is a ribbon lake in north-west Wales. It lies alongside the ...

(flows into

)

Cegin catchment

River Cegin A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...

(Afon Cegin)

Adda catchment

* River Adda (Afon Adda)

Isle of
Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island ...
rivers

Anticlockwise from Menai Bridge / Porthaethwy

Minor coastal catchments

Afon Cadnant The Afon Cadnant ( en, River Cadnant) is a small river on Anglesey, North Wales, which drains to the Menai Strait about 1 km north-east of the Menai Suspension Bridge. The river drains a largely agricultural area from Llandegfan to Llansadw ...

(River Cadnant) * Nant Meigan * Lleiniog * Afon Nodwydd *

Afon y Marchogion This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Afon Lligwy This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstr ...

* Nant Perfedd *

(Dulas) * Nant y Beddyw * Afon Bryn Gwyn *

(Amlwch) *

Afon Wygyr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

* Gwter Fudr * Afon Alaw (River Alaw)

Crigyll catchment

Afon Crigyll This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Afon Caradog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L)

Ffraw catchment

Afon Ffraw The Afon Ffraw is a short river on the Isle of Anglesey, Wales. It arises at Llyn Coron and flows southwest for two miles along the northwestern margin of Twyn Aberffraw ('Aberffraw dunes') via the village of Aberffraw to Aberffraw Bay on the islan ...

Afon Frechwen The Afon Ffraw is a short river on the Isle of Anglesey, Wales. It arises at Llyn Coron and flows southwest for two miles along the northwestern margin of Twyn Aberffraw ('Aberffraw dunes') via the village of Aberffraw to Aberffraw Bay on the islan ...

(L) **

Afon Gwna The Afon Ffraw is a short river on the Isle of Anglesey, Wales. It arises at Llyn Coron and flows southwest for two miles along the northwestern margin of Twyn Aberffraw ('Aberffraw dunes') via the village of Aberffraw to Aberffraw Bay on the islan ...

(flows into

Llyn Coron The Afon Ffraw is a short river on the Isle of Anglesey, Wales. It arises at Llyn Coron and flows southwest for two miles along the northwestern margin of Twyn Aberffraw ('Aberffraw dunes') via the village of Aberffraw to Aberffraw Bay on the isla ...

)

Cefni catchment

* Afon Cefni (River Cefni) **

Afon Newydd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Ceint This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Erddreiniog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) (flows into

Cefni Reservoir Llyn Cefni is a small reservoir in the centre of Anglesey, Wales which is managed by Welsh Water and Hamdden Ltd, while the fishery is managed by the Cefni Angling Association. The reservoir is located just northwest of the island's county town ...

)

Braint (i) catchment

The Afon Braint bifurcates near Llanfairpwllgwyngyll to form two different watercourses. *

Afon Braint Afon Braint ( en, River Braint) is a small tidal river on Anglesey, North Wales. There is a series of stepping stones near the village of Dwyran, and a Grade II bridge near Penmynydd. Until recently, there was an electoral ward named after the ...

(River Braint, Dwyran) **

Afon Rhyd y Valley This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L)

Braint (ii) catchment

(LlanfairPG) **

Afon Rhyd Eilian This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ''Note "Afon Menai", known as the "

Menai Strait The Menai Strait ( cy, Afon Menai, the "river Menai") is a narrow stretch of shallow tidal water about long, which separates the island of Anglesey from the mainland of Wales. It varies in width from from Fort Belan to Abermenai Point to from ...

" in English, is not technically a river, despite its Welsh name.''.

Mainland rivers flowing into the
Menai Strait The Menai Strait ( cy, Afon Menai, the "river Menai") is a narrow stretch of shallow tidal water about long, which separates the island of Anglesey from the mainland of Wales. It varies in width from from Fort Belan to Abermenai Point to from ...
and
Caernarfon Bay Caernarfon Bay (occasionally Caernarvon Bay) is an inlet of the Irish Sea defined by the Llŷn peninsula and Anglesey. The gentle coastline surrounding it is home to villages including Nefyn, Pistyll, Trefor, Gwynedd, Trefor, Llithfaen , and ...

''From Bangor Pier to the tip of the Llŷn Peninsula''

Seiont catchment

Afon Seiont Afon Seiont (Welsh, meaning ''River Seiont'' in English) is a river in Gwynedd, Wales which runs into the Menai Strait. Its source is the outflow of Llyn Padarn near Llanberis, and it flows out in a generally northwest direction. Between the ...

(River Seiont) (known as Afon Rhythallt above Pont-Rhythallt) **

Afon Nant Peris This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(flows into Llyn Peris) ***

Afon Arddu This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L)

Gwyrfai catchment

Afon Gwyrfai The Afon Gwyrfai is a short river in Gwynedd, Wales. For half of its length it flows through Snowdonia National Park. Exiting Llyn y Gader it flows north through the small village of Rhyd-ddu to enter the southeastern end of Llyn Cwellyn. Downstr ...

Afon Carrog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) ***

Afon Rhŷd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R)

Simple coastal catchments

Afon Llifon This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

* Afon Llyfni, Lleyn *

Afon Desach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Afon Hen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Nant Gwrtheyrn Nant Gwrtheyrn is a Welsh Language and Heritage Centre, located near the village of Llithfaen on the northern coast of the Llŷn Peninsula, Gwynedd, in northwest Wales. It is sometimes referred to as 'the Nant' and is named after the valley wh ...

Afon Geirch This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

Afon Amwlch This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Afon Pen-y-graig This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Rivers flowing into Cardigan Bay

''From the tip of the Llŷn Peninsula to St. David's Head'' *

Afon Saint This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Daron catchment

Afon Daron This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

Afon Cyllyfelin This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R)

Soch catchment

Afon Soch The Afon Soch is a short river on the Llŷn peninsula, Gwynedd, Wales. It arises to the north of the village of Sarn Meyllteyrn, through which it then flows, turning southeast towards Botwnnog. Beyond Botwnnog it is joined by its main left-bank t ...

Afon Horon This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L)

Rhyd-hir catchment etc

Afon Rhyd-hir The Afon Erch is a short river on the Llŷn peninsula, Gwynedd, Wales. It arises on the slopes of Bwlch Mawr, flowing south and southwest towards the hamlet of Llwyndyrys where it turns abruptly eastwards and curves around to the south, passing ...

Afon Penrhos This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) *

Afon Erch The Afon Erch is a short river on the Llŷn peninsula, Gwynedd, Wales. It arises on the slopes of Bwlch Mawr, flowing south and southwest towards the hamlet of Llwyndyrys where it turns abruptly eastwards and curves around to the south, passing ...

Afon Wen Afon Wen is a small hamlet on the Llŷn peninsula in the Welsh principal area of Gwynedd. Location It is located at the mouth of the Afon Wen river, half a mile from the village of Chwilog and midway between Pwllheli and Cricieth. History ...

Dwyfor catchment

Afon Dwyfor The Afon Dwyfor is a river in Gwynedd, north-west Wales, in total the river is in length. It rises in Cwm Dwyfor at the head of Cwm Pennant, gathers to itself numerous streams which drain the surrounding mountains from Mynydd Graig Goch in the ...

Afon Dwyfach The Afon Dwyfor is a river in Gwynedd, north-west Wales, in total the river is in length. It rises in Cwm Dwyfor at the head of Cwm Pennant, gathers to itself numerous streams which drain the surrounding mountains from Mynydd Graig Goch in the ...

(R) ** Afon Henwy (L)

Glaslyn catchment

Afon Glaslyn The Afon Glaslyn (English, ''River Glaslyn'') is a river in Gwynedd, north-west Wales. While not of great significance in terms of its length (about ), it is one of Gwynedd's primary rivers, and has greatly influenced the landscape in which it ...

** Afon Dylif ***

Afon Croesor This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Nantmor Nantmor is a hamlet which lies about 1½ miles to the south of the village of Beddgelert in Gwynedd, Wales. The current spelling of the name Nantmor is more modernmost old documentfrom the 16th to the 18th century record the name as Nanmor. It ...

(L) **

Afon Colwyn The Afon Colwyn ( en, River Colwyn, italic=yes) is a small river in Gwynedd, north-west Wales, a tributary of the Afon Glaslyn. It has its source on the south-western flank of Snowdon. It first flows west to cross the A4085 Caernarfon to Bed ...

(R) **

Afon Llynedno This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) * Afon Dwyryd (Headwaters are disputed to be the Afon Goedol) **

Afon y Glyn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ** Afon Prysor (L) **

Afon Cynfal This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Teigl This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) **

Afon Bowydd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Afon Tafarn Helyg This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Artro catchment

Afon Artro The River Artro ( cy, Afon Artro) is a river in Gwynedd, Wales. It is about long and has its source at Llyn Cwm Bychan below Rhinog Fawr and Moel Ysgyfarnogod. It flows westwards from its source and is joined by the Afon Cwmnantcol at Pentr ...

Afon Cwmnantcol The River Cwmnantcol (''Afon Cwmnantcol'' in Welsh) is a river in North Wales. It is about long and has its source at the head of Cwm Nantcol below Rhinog Fawr and Y Llethr Y Llethr is the highest mountain in the Rhinogydd range o ...

(L)

Ysgethin catchment

Afon Ysgethin The Afon Ysgethin is a short river in Gwynedd, Wales. Flowing entirely within Snowdonia National Park it rises beneath the peaks of Y Llethr and Diffwys within the Rhinogs mountain range and runs in a generally ESE direction towards Cardigan Ba ...

Mawddach catchment

Afon Mawddach The Afon Mawddach ( en, River Mawddach, italic=yes) is a river in Gwynedd, Wales, which has its source in a wide area north of Dduallt in Snowdonia. It is 28 miles (45 km) in length, and is much branched; many of the significant tribut ...

** Afon Dwynant (R) **

Afon Gwynant This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) **

Afon Cwm-llechen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(R) **

Afon Cwm-mynach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Afon Wnion (L) ***

Afon Clywedog The Afon Clywedog is an upland headwater tributary of the River Severn in Powys, Wales. It is approximately 29 km long and has its source on the flanks of Plynlimon and has its confluence with the Severn in Llanidloes. The annual rainfall ...

(L) ***

Afon Celynog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

(L) ** Afon Gamlan (R) ** Afon Eden (R) ***

Afon Crawcwellt This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) ** Afon Gain (R)

Dysynni catchment

Afon Dysynni , name_etymology = , image = Afon Dysynni & Morfa Gwyllt - geograph.org.uk - 194680.jpg , image_size = , image_caption = Dysynni estuary , map = , map_size = , map_caption ...

(R) **

Afon Fathew The Afon Fathew ( en, River Mathew/Fathew) is a river in Gwynedd, north-west Wales. The river is downstream from the Dolgoch Falls which is a popular nature site, and is followed for much of its course by the Talyllyn Railway. Name The bas ...

(L) **

Afon Cadair This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Nant Gwernol (L)

Dyfi catchment

* River Dyfi (River Dovey) **

Afon Leri The Afon Leri ( en, River Leri) is a river in Ceredigion, Wales. It rises at Llyn Craig-y-Pistyll and is joined at Talybont by Afon Ceulan before passing behind Borth to its mouth in the Dyfi estuary at Ynyslas. The river once flowed into Ca ...

(L) ***

Afon Ceulan This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Einion This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Llyfnant The River Llyfnant ( cy, Afon Llyfnant) is a short river in Ceredigion, on the west coast of Wales. The river rises in the mountains south of Machynlleth, reaches the hill walk of Uwch Garreg and then plunges over a series of waterfalls known ...

(L) ** Afon Dulas (R) (North Dulas) *** Afon Deri (R) *** Nant Ceiswyn (R) ** Afon Dulas (L) (South Dulas) **

Afon Twymyn The Afon Twymyn ( en, River Twymyn, italic=yes) is a river in Powys, Mid Wales. From its source at the 40-metre high Ffrwd Fawr waterfall and head of the Pennant Valley near Dylife the river flows through Llanbrynmair before joining the Rive ...

(L) *** Afon Rhiwsaeson (R) ****

Afon Laen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Angell The Afon Angell is a river in Gwynedd, Mid Wales. The river flows eastwards from its source on the eastern flank of Mynydd Dolgoed, joining the Afon Dyfi at the small village of Aberangell. The river was known for its salmon and trout fishing ...

(R) **

Afon Cleifion This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstr ...

(L) ***

Afon Dugoed This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Rs) *** Afon Tafolog (Ls) ** Afon Cerist (R) ** Afon Cywarch (R)

Clarach catchment

* Afon Clarach (formed at the confluence of

Afon Stewi This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

and Nant Silo) ** Bowstreet Brook (R) **

Afon Peithyll This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Ls)

Rheidol catchment

* River Rheidol (Afon Rheidol) **

Afon Melindwr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) **

River Mynach The Afon Mynach ( en, River Mynach) is a small river in Ceredigion, Wales. Its source is at the meeting of two smaller rivers, the Nant Rhuddnant and the Afon Merin. Both of these streams have their sources in lakes high on the Cambrian Mountai ...

(L) (Afon Mynach) ***

Afon Merin This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Rs) *** Nant Rhuddnant (Ls) **

Afon Castell This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Llechwedd Mawr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(flows into Nant y Moch Reservoir) ***

Afon Lluestgota This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Hengwm This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(flows into Nant y Moch Reservoir) ***

Afon Hyddgen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Nant-y-moch (stream flowing into Nant-y-moch Reservoir)

Ystwyth catchment

* River Ystwyth (Afon Ystwyth) **

Afon Fâd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ** Afon Llanfihangel (R) *** Nant Cynon (Ls) **

Afon Magwr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Nant Freuo (L) ** Nant Pant-yr-Haidd (R) ** Nant Cwmtarw (L) *** Nant Cwm-nel (L) ** Nant Cilmeddu (L) ** Nant y Henfelin (L) *** Nant yr Brithyll (R) ** Nant y Berws (L) ** Nant Cell (R) ** Nant Lledwenau (R) ** Nant Bwlchgwallter (L) ** Nant Peiran (R) *** Nant Crafanglach (R) *** Nant Perfedd (L) *** Nant Ffrin-fawr (Rs) **** Nant Hylles (L) ** Nant Gau (L) *** Nant Ffrwd-ddu (L) ** Nant Cae-glas (R) *** Nant y Gwndwn-gwyn (Ls) *** Nant Cwta (Rs) ** Nant Milwyn (L) ** Nant Byr (L) ** Nant y Gwaith (R) ** Nant Watcyn (R) ** Nant yr Onnen (R) ** Nant Cwm-du (L) ** Nant Stwc (R) ** Nant Penygwndwn (L) ** Nant Garw (R) ** Nant y Cae Isaf (L) ** Nant y Cae (L) ** Nant Troedyrhiw (R) **

Afon Diliw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** Nant yr Gafod (R) *** Diliw Fechan (R) *** Nant y Caseg (L) *** Nant yr Eglwys **** Nant yr Eglwys-fach (L) *** Nant Lwyd (R) *** Nant y Gorlan (Rs) *** Nant Llychese (R) ** Nant Rhydyfelin (L) ** Nant Ffos-casaf (L)

Wyre catchment

* Afon Wyre **

(R) **

Wyre Fach Wyre may refer to: Places * Wyre, Orkney, an island in Scotland * Borough of Wyre, a local government district in Lancashire, England ** Wyre (UK Parliament constituency) * River Wyre, a river in Lancashire, England * Wyre Forest, a woodland in ...

(L) *** Nant Rhydrosser (L) *** Afon Tryal (L) ** Afon Beidog (L)

Cledan catchment

Afon Cledan This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

Arth catchment

River Arth The River Arth is a small river that rises in the hills near Bethania, Ceredigion, Wales, and runs west for and discharges into Cardigan Bay at Aberarth. Despite its small size it is one of the few rivers in Britain which has a bore when the ...

Aeron catchment

* Afon Aeron **

Afon Mydr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ** Gwenffrwd (R)

Coastal streams

Afon Drywi This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

Afon Soden This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

Afon Fynnon Ddewi This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

* Nant Hawen * Hoffnant

Teifi catchment

* River Teifi (Afon Teifi) **

Afon Piliau This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ** Nant Arberth (R) ** Afon Cych (L) *** Afon Dulas (L) ***

Afon Pedran This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ***

Afon Sylgen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) **

Afon Hirwaun This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Nant Elfed (R) **

Afon Ceri This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ***

Afon Dulas (Lampeter) The Afon Dulas, or North Dulas, is a river forming the border between Merionethshire/Gwynedd and Montgomeryshire/Powys in Wales. Another river called Afon Dulas joins the Dyfi from the south, upstream of its confluence with the North Dulas: loca ...

(R) ***

Afon Bedw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) ** Nant Bargod (L) **

Afon Tyweli This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ***

Afon Talog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Clettwr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(P) *** Clettwr Fawr (Rs) *** Clettwr Fach (Ls) ** Nant Cledlyn (R) **

Afon Duar This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ** Afon Granell (R) **

Afon Dulas (Llandyssul) The Afon Dulas, or North Dulas, is a river forming the border between Merionethshire/Gwynedd and Montgomeryshire/Powys in Wales. Another river called Afon Dulas joins the Dyfi from the south, upstream of its confluence with the North Dulas: loca ...

(R) ***

Afon Denys This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) ** Nant Clywedog (L) *** Clywedog-isaf (Ls) *** Clywedog-ganol (Rs) **** Clywedog-uchaf (R) **

Afon Brefi This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ** Nant Bryn-maen (R) **

Afon Berwyn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) *** Afon Groes (R) **

Afon Fflur This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Camddwr : ''For the tributary of the River Wye, see Camddwr, Wye and for the tributary of the River Teifi, see Camddwr, Teifi.'' The Camddwr is a significant right-bank tributary of the River Towy in the eastern part of Ceredigion, mid Wales. It rises on ...

(R) **

Afon Meurig This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Nant Lluest (R) ** Glasffrwd (L) ** Nant Egnant (L) ** Nant Rhydol (R)

Nyfer catchment etc

* Afon Nyfer ** Nant Duad (R) **

Afon Brynberian This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) **

Afon Bannon This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L)

Minor coastal catchments

River Gwaun A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

(Afon Gwaun) **

River Aer A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

(L)

Rivers flowing to west Pembrokeshire coast

''From

St David's Head St David's Head ( cy, Penmaen Dewi) is a headland in the Pembrokeshire Coast National Park, southwest Wales, which marks the divide between the Irish Sea and the Celtic Sea. It is noted for its wildflowers and wildlife, and for the remains of ...

St. Govan's Head ST, St, or St. may refer to: Arts and entertainment * Stanza, in poetry * Suicidal Tendencies, an American heavy metal/hardcore punk band * Star Trek, a science-fiction media franchise * Summa Theologica, a compendium of Catholic philosophy ...

Minor catchments

* River Alun * River Solva (Afon Solfach) *

Brandy Brook Brandy is a liquor produced by distilling wine. Brandy generally contains 35–60% alcohol by volume (70–120 US proof) and is typically consumed as an after-dinner digestif. Some brandies are aged in wooden casks. Others are coloured wit ...

Cleddau catchment

Daugleddau The River Cleddau ( cy, Afon Cleddau) consists of the Eastern and Western Cleddau rivers in Pembrokeshire, west Wales. They unite to form the Daugleddau estuary and the important harbour of Milford Haven. The name of the combined estuary – ...

(estuary is Daugleddyf or

Milford Haven Milford Haven ( cy, Aberdaugleddau, meaning "mouth of the two Rivers Cleddau") is both a town and a community in Pembrokeshire, Wales. It is situated on the north side of the Milford Haven Waterway, an estuary forming a natural harbour that has ...

downstream) ** Pembroke River (L) **

Carew River Carew may refer to: * Carew (surname) * Carew, Pembrokeshire, in Wales **Carew (electoral ward), a ward coterminous with the Welsh community * Carew, New Zealand, in the Ashburton District * Carew, South Australia, see Tatiara District Council# ...

(L) **

Cresswell River Cresswell may refer to: Places England *Cresswell, Northumberland, England **Cresswell Castle, Northumberland or Cresswell Pele Tower, constructed in the 15th century *Cresswell, Staffordshire, near Stoke-on-Trent *Cresswell Quay, a settlement in ...

(L) ** Western Cleddau (Rs) ***

Millin Brook Millin is a surname. Notable people with the surname include: *Aubin-Louis Millin de Grandmaison (1759–1818), antiquary and naturalist erudite in various domains *Bill Millin (1922–2010), personal piper to Simon Fraser, 15th Lord Lovat, command ...

(L) *** Merlin's Brook (R) *** Cartlett Brook (L) ***

Knock Brook Knock may refer to: Places Northern Ireland * Knock, Belfast, County Down * Knock, County Armagh, a List of townlands in County Armagh, townland in County Armagh Republic of Ireland * Knock, County Clare, village in County Clare * Knock, Count ...

(R) ****

Camrose Brook Camrose may refer to: ;People *Viscount Camrose ;Locations *Camrose, Alberta, Canada *Camrose, Pembrokeshire, Wales See also *Camrose Trophy The Camrose Trophy or "The Camrose" is an annual bridge competition among open teams representing the ...

(R) ***

Rudbaxton Water Rudbaxton is a village, parish and a local government Community (Wales), community in the county of Pembrokeshire, Wales. It is from Cardiff and from London. Description The community includes the expanding village of Crundale, Pembrokeshire, C ...

(L) ***

Spittal Brook Spital or Spittal may refer to: Places Austria *Spital (Weitra), a hamlet in the Waldviertel, Lower Austria, notable for being the origin of some of Adolf Hitler's family *Spital am Pyhrn, a municipality in Upper Austria *Spital am Semmering, a ...

(L) *** Nant-y-coy Brook (R) ***

Afon Anghof This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ****

Afon Glan-rhyd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** Nant y Bugail (L) ***

Afon Cleddau The River Cleddau ( cy, Afon Cleddau) consists of the Eastern and Western Cleddau rivers in Pembrokeshire, west Wales. They unite to form the Daugleddau estuary and the important harbour of Milford Haven. The name of the combined estuary – ...

(upper reaches of Western Cleddau) ** Eastern Cleddau (Ls) *** Afon Syfynwy (R) ***

Afon Wern This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R)

Rivers flowing into the
Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Seve ...

''From

to M48 Bridge''

Taf catchment

* River Tâf (Afon Taf) **

River Cywyn The River Cywyn (Welsh ''Afon Cywyn'') is a river that flows through Carmarthenshire, south Wales. It rises some seven miles west-north-west of Carmarthen and flows in a southerly direction to join the River Tâf The River Taf ( cy, Afon Taf ...

(Afon Cywyn) (L) **

Afon Cynin This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) *** Afon Dewi Fawr (L) ***

Afon Sien This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Fenni This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Afon Gronw (L) ** Afon Marlais (R)

Towy catchment

Afon Tywi The River Towy ( cy, Afon Tywi, ) is one of the longest rivers flowing entirely within Wales. Its total length is . It is noted for its sea trout and salmon fishing. Route The Towy rises within of the source of the River Teifi on the lower slo ...

(River Towy) ** Afon Gwili (R) ** Afon Annell (R) **

River Cothi The Afon Cothi ( en, River Cothy) is the largest tributary of the River Tywi in south Wales. It is noted for its trout and sea trout (sewin) fishing Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from t ...

(R) (Afon Cothi) ***

Afon Gorlech This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** Afon Twrch (R) *** Afon Marlais (R) ** Afon Dulas (R) **

Afon Cennen The Afon Cennen is a river in the county of Carmarthenshire, south Wales. It rises on the northern slopes of the Black Mountain to the east of the summit of Tair Carn Uchaf and flows north to Blaencennen Farm, then westwards past Carreg Cennen ...

(L) ** Afon Sawdde (L) ** Afon Bran (L) ***

Afon Ydw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Dulais River Dulais ( cy, Afon Dulais) is a river of Wales which has its source at Mynydd y Drum. It joins the River Neath after flowing over Aberdulais Falls The Aberdulais Falls are found on the River Dulais at Aberdulais, near Neath in the county b ...

(R) ** Afon Brân (L) *** Cynnant Fawr (Rs) **** Cynnant Fach (L) *** Afon Lwynor (Ls) ***

Afon Crychan This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ***

Afon Gwydderig The Afon Gwydderig is a tributary of the Afon Brân. It rises as the Nant Gwydderig on the southern slopes of Mynydd Bwlch-y-groes, about North of the small village of Llywel, Powys. The A40 runs next to the river from Llywel as far as Lla ...

(L) **

Afon Gwenlais This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Gwenffrwd (R) *** Nant Melyn (R) **

Afon Doethie This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ***

Afon Pysgotwr Fawr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ****

Afon Pysgotwr Fach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(R) **

(R)

Gwendraeth catchment

* River Gwendraeth **

Gwendraeth Fach The River Gwendraeth ( cy, Afon Gwendraeth) is a river in Carmarthenshire in West Wales. It has two almost equal branches that have their confluence in their joint estuary at Carmarthen Bay. The Gwendraeth Fawr (''large Gwendraeth'' in English) ...

(Rs) **

Gwendraeth Fawr The River Gwendraeth ( cy, Afon Gwendraeth) is a river in Carmarthenshire in West Wales. It has two almost equal branches that have their confluence in their joint estuary at Carmarthen Bay. The Gwendraeth Fawr (''large Gwendraeth'' in English) ...

(Ls)

Lliedi catchment

River Lliedi The River Lliedi ( cy, Afon Lliedi) has its source near Mynydd Sylen Llanelli and Llannon in Carmarthenshire, Wales. The river fills the Cwm-Lliedi Reservoirs and meets the sea at the Loughor Estuary (Welsh-Moryd Llwchwr) at the former Carmarthe ...

(Afon Lliedi)

Loughor catchment

River Loughor The River Loughor () ( cy, Afon Llwchwr) is a river in Wales which marks the border between Carmarthenshire and Swansea. The river is sourced from an underground lake at the Black Mountain emerging at the surface from Llygad Llwchwr which trans ...

(Afon Llwchwr) **

Burry Pill Burry is a surname. Notable people with the surname include: * Andrew George Burry (1873–1975), businessman, manufacturer and philanthropist *Harold Burry (1912–1992), head football coach at Westminster College * Hugh Burry (1930–2013), New Z ...

(L) ** Afon Lliw (L) ***

Afon Llan This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ** Afon Gwili (R) **

River Amman The River Amman () is a river of south Wales, which joins the River Loughor at Pantyffynnon. The source of the Amman is on the Black Mountain. The river name is said to derived from the Welsh word ' "pig, piglet", reflecting the way in which ...

(L) **

Afon Lash This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(R) **

Afon Morlais The Afon Morlais is a small river in south Wales, a tributary of the River Loughor. It rises in the village of Cross Hands and then flows southwards through Tumble before turning south east through a rural wooded valley before passing through L ...

(R) **

** Afon Camffrwd

Clyne catchment

* Clyne River

Tawe catchment

River Tawe The River Tawe (; cy, Afon Tawe ) is a long river in South Wales. Its headwaters flow initially east from its source below Llyn y Fan Fawr south of Moel Feity in the Black Mountains, the westernmost range of the Brecon Beacons National Pa ...

** Nant y fendrod (L) **

Lower Clydach River The Lower Clydach River is a river in South Wales which rises on the slopes of Mynydd y Betws west of Cwmgors Cwmgors is a village in the county of Glamorgan, and administered as part of the unitary authority borough of Neath Port Talbot, Wa ...

(R) **

Upper Clydach River The Upper Clydach River runs from a poorly drained area south of Cwmgors and flows south and southeast through Cwm Gors for about 7 km to join the River Tawe at Pontardawe Pontardawe () is a town and a community in the Swansea Valley (Wels ...

(R) ***

River Egel A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

(L) ** Afon Twrch (R) *** Nant Gwys (L) **** Gwys Fawr (Ls) **** Gwys Fach (Rs) *** Nant Llynfell (R) *** Nant y Llyn (R) ** River Giedd (R) *** Nant Cyw (L) *** Nant Ceiliog (L) **

Nant Llech The Nant Llech is a minor river in Powys, Wales and which lies wholly within the Brecon Beacons National Park. The name means 'slab stream', presumably in reference to the sandstones across which it runs. Its headwater streams, the Nant Llech Pell ...

(L) *** Nant Llech Pellaf (L) **

River Haffes The Afon Haffes is a river in Powys, Wales and is wholly contained within the Brecon Beacons National Park (Parc Cenedlaethol Bannau Brycheiniog). Its headwaters rise on the southern and western slopes of Fan Hir at the eastern edge of the Black ...

(R) ** Nant Byfre (L) ** Nant y Llyn (R)

Neath catchment

River Neath River Neath ( cy, Afon Nedd) is a river in south Wales running south west from the point at which its headwaters arising in the Brecon Beacons National Park converge to its mouth at Baglan Bay below Briton Ferry on the east side of Swansea Bay. ...

** River Clydach (R) **

River Dulais River Dulais ( cy, Afon Dulais) is a river of Wales which has its source at Mynydd y Drum. It joins the River Neath after flowing over Aberdulais Falls The Aberdulais Falls are found on the River Dulais at Aberdulais, near Neath in the county ...

(R) ** Melin Cwrt Brook (L) **

Clydach Brook Clydach may refer to any of various settlements and rivers in South Wales: * Clydach, Monmouthshire (village) * Clydach, Swansea (village) :*Clydach (electoral ward), an electoral ward in the City and County of Swansea * Clydach Gorge, (Welsh Cwm Cl ...

(L) ** Nedd Fechan (Rs) ***

Afon Pyrddin The Afon Pyrddin is a river forming a short section of the boundary between the counties of Brecknockshire and Glamorgan in Wales, Great Britain. It also forms a part of the boundary of the Brecon Beacons National Park, and the boundary of the unit ...

(R) ** Afon Mellte (Ls) ***

Sychryd The Afon Sychryd is a river in Rhondda Cynon Taf, Wales. Although it is a relatively short river, with a total length of , it is notable for the gorge and two waterfalls through which it flows. Course The river has two upper arms, the first arise ...

(L) *** Afon Hepste (L) ***

Afon Llia The Afon Llia is a short river in Powys, Wales, and which is wholly contained within the Brecon Beacons National Park. Several streams draining the eastern slopes of Fan Nedd and the western slopes of Fan Dringarth in the Fforest Fawr section of ...

(Rs) ***

Afon Dringarth The Afon Dringarth (or simply ''Tringarth'') is a river in Powys, Wales and wholly contained within the Brecon Beacons National Park. Its headwater streams drain the eastern slopes of Fan Dringarth (which is probably named after the river), the s ...

(Ls)

Afan catchment

River Afan , name_etymology = , image = The_Afon_Afan,_Cymmer_-_geograph.org.uk_-_1001060.jpg , image_size = , image_caption = The Afan near Cymmer , map = , map_size = , map_caption ...

** Ffrwd Wyllt (L) ** Nant Cwm Wenderi **

Afon Pelenna This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) ** Nant Cregan ** Afon Corrwg (R) *** Afon Corrwg Fechan (R)

Kenfig catchment

River Kenfig The River Kenfig ( cy, Afon Cynffig) is a river in Wales, straddling the county boroughs of Neath Port Talbot and Bridgend. It is approximately 18 kilometres long. Course The river rises in the forest of Mynydd Margam, southwest of Maesteg. Fro ...

(Afon Cynffig)

Ogmore catchment

River Ogmore The River Ogmore ( cy, Afon Ogwr) is a river in South Wales that is popular with anglers. It runs generally from north to south from the Ogmore Vale and Gilfach Goch, past Bridgend and Ogmore. The River Ogmore rises at Craig Ogwr (527 m) in the ...

(Afon Ogwr) **

River Ewenny The Ewenny River ( cy, Afon Ewenni) is a river in South Wales. For most of its length, it forms the border between the Vale of Glamorgan and Bridgend. It is a major tributary of the River Ogmore, which it joins near its estuary. Course The rive ...

(L) ***

Afon Alun The Afon Alun is a river in the Vale of Glamorgan, south Wales. It is a tributary of the Ewenny River, which it joins to the south of Bridgend. Course Two streams join near Llandow village to form the river: the Stembridge Brook and the Llando ...

(L) ***

Afon Ewenny Fach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) *** Nant Canna (L) *** Nant Crymlyn (R) ** River Llynfi (R) *** Nant y Gadlys (R) *** Nant Cwm-du (L) **

Afon Garw The River Garw (''Afon Garw'' in Welsh, meaning "rugged river") runs for about 12 miles from its source in the hills north of Blaengarw to the confluence with the River Ogmore and the River Llynfi at Aberkenfig. It is one of three main tributarie ...

(R) **

Afon Ogwr Fawr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Rs) **

Afon Ogwr Fach This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(Ls) *** Nant Iechyd (R)

Col-huw catchment

Afon Col-huw The Afon Col-huw (Often River Colhuw, sometimes Anglicised Colhugh) is a very short river in Llantwit Major in the Vale of Glamorgan, south Wales. It is an exceptionally short river, with a length of only 1 mile/1.6 kilometres long. It is form ...

** Ogney Brook (Rs) ** Hoddnant (Ls) ***

Boverton Brook Boverton ( cy, Trebefered) is a village located to the east of Llantwit Major in the Vale of Glamorgan in South Wales. History Boverton was founded during the reign of William the Conqueror in England. It is thought that he himself founded Bover ...

(Ls) ***

Llanmaes Brook Llanmaes ( cy, Llanfaes) is a small village and community in the Vale of Glamorgan near the market town of Llantwit Major. The population in 2011 was 403. Amenities Llanmaes has a long history, with remains of a Roman fort in fields next to ...

(Rs)

Thaw catchment

* River Thaw **

Kenson River Kenson may refer to: *River Kenson, a river of South Wales *Steve Kenson (born 1969), writer and designer of fantasy role-playing games and related fiction *Kenson Park, a neighborhood in Ottawa, Canada *Kenson Lee, visual artist and composer prev ...

(L) ***

River Waycock A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...

(Ls) *** Nant Llancarfan (Rs) ** Nant y Stepsau (R)

Cadoxton catchment

Cadoxton River The Cadoxton River ( cy, Afon Tregatwg) is a short river in the Vale of Glamorgan, South Wales and with a length of about 5 miles/8 kilometres it is one of Wales's shortest rivers. Course The water course becomes known as the Cadoxton just north ...

Sully Brook Sully may refer to: * Chesley "Sully" Sullenberger (born 1951), American pilot notable for landing his disabled airliner on the Hudson ** ''Sully'' (film), a 2016 film by Clint Eastwood about Sullenberger Places France * Sully, Calvados, commun ...

(L) **

Cold Brook, Cadoxton Cold is the presence of low temperature, especially in the atmosphere. In common usage, cold is often a subjective perception. A lower bound to temperature is absolute zero, defined as 0.00K on the Kelvin scale, an absolute thermodynamic ...

(R) *** Nant yr Argae (L) ** East Brook, Cadoxton (L) ** Bullcroft Brook (Ls) **

Wrinstone Brook Wrinstone or Wrinston ( cy, Wrinstwn) is a medieval hamlet, just east of Wenvoe, Vale of Glamorgan, south Wales. The Wrinstone estate was variously also known as Wrenston, Wrencheston or Wrenchester. The Barry Railway line ran past the hamlet and e ...

(Rs)

Taff catchment

(Afon Taf) **

River Ely The River Ely ( cy, Afon Elái) is in South Wales flowing generally southeast, from Tonyrefail to Cardiff. The river is about long. The Ely's numerous sources lie in the mountains to the south of Tonypandy, near the town of Tonyrefail, ris ...

(Afon Elái) (R) *** Afon Clun (L) (Nant Myddlyn in upper reaches) **

River Rhondda The River Rhondda ( cy, Afon Rhondda) is a river in South Wales with two major tributaries, Rhondda Fawr (meaning ''big Rhondda'') and Rhondda Fach (meaning ''little Rhondda''). Description The river has two major tributaries, the ''Rhondda Fa ...

(R) (Afon Rhondda) ***

Rhondda Fawr Rhondda , or the Rhondda Valley ( cy, Cwm Rhondda ), is a former coalmining area in South Wales, historically in the county of Glamorgan. It takes its name from the River Rhondda, and embraces two valleys – the larger Rhondda Fawr valley (' ...

(Ls) *** Rhondda Fach (Rs) ***

River Ritec A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...

(Afon Ritec) ** Nant Clydach (R) **

River Cynon The River Cynon ( cy, Afon Cynon) in South Wales is a main tributary of the Taff. Its source is the rising of Llygad Cynon (OS grid ref SN 95240 07740) at above sea level at Penderyn, Rhondda Cynon Taf and flows roughly southeast, into the Taf ...

(R) (Afon Cynon) *** Aman River *** Afon Dar *** Afon Pennar **

Bargoed Taf Bargoed ( cy, Bargod) is a town and community in the Rhymney Valley, Wales, one of the South Wales Valleys. It lies on the Rhymney River in the county borough of Caerphilly. It straddles the ancient boundary of Glamorgan and Monmouthshire, with ...

(L) ** Nant Morlais **

Taf Fechan The River Taff ( cy, Afon Taf) is a river in Wales. It rises as two rivers in the Brecon Beacons; the Taf Fechan (''little Taff'') and the Taf Fawr (''great Taff'') before becoming one just north of Merthyr Tydfil. Its confluence with the R ...

(Ls) **

Nant Ffrwd The River Taff ( cy, Afon Taf) is a river in Wales. It rises as two rivers in the Brecon Beacons; the Taf Fechan (''little Taff'') and the Taf Fawr (''great Taff'') before becoming one just north of Merthyr Tydfil. Its confluence with the Riv ...

(Rs)

Rhymney catchment

Rhymney River The Rhymney River ( cy, Afon Rhymni) is a river in the Rhymney Valley, South Wales, flowing through Cardiff into the Severn Estuary. The river formed the boundary between the historic counties of Glamorgan and Monmouthshire until in 1887, t ...

(Afon Rhymni) ** Nant Bargod Rhymni (R)

Usk catchment

River Usk The River Usk (; cy, Afon Wysg) rises on the northern slopes of the Black Mountain (''y Mynydd Du''), Wales, in the westernmost part of the Brecon Beacons National Park. Initially forming the boundary between Carmarthenshire and Powys, it fl ...

(Afon Wysg) ** Ebbw River (R) (Afon Ebwy) *** Sirhowy River (R) *** River Ebbw Fach (L) **

Afon Llwyd The Afon Lwyd or Afon Llwyd ( en, 'grey river') is a long river in south-east Wales which flows from its source northwest of Blaenavon, through Abersychan, Pontnewynydd, Pontypool, Llanfrechfa and Cwmbran before flowing, at Caerleon, into the R ...

(R) **

Sôr Brook The Sôr Brook is a right bank tributary of the River Usk running largely in Monmouthshire in south Wales, though the watercourse forms the boundary with neighbouring Torfaen in places. Its uppermost reaches were inundated by the construction o ...

(R) **

Olway Brook The Olway Brook (Welsh: ''Nant Olwy'') is a left bank tributary of the River Usk in Monmouthshire in south Wales. Arising from the confluence of several brooks in the vicinity of Llansoy including the Llangofen, Penarth and Pontyrhydan brooks, it ...

(L) **

Berthin Brook The Berthin Brook is a minor right bank tributary of the River Usk in Monmouthshire, in south Wales. Flowing north from New Inn initially, it turns east at Little Mill to flow along a former glacial meltwater channel past the former Royal Ordnanc ...

(R) **

Afon Gafenni The River Gavenny or sometimes the Gavenny River ( cy, Afon Gafenni) is a short river in Monmouthshire in south Wales. It rises southwest of the village of Llanvihangel Crucorney from springs near Penyclawdd Court, supplemented by springs in Bl ...

(L) (River Gavenny) *** Afon Cibi (R) ** River Clydach (R) **

Grwyne Fawr The Grwyne Fawr is a river in the Brecon Beacons National Park in south Wales. A section of it forms the administrative border between Powys and Monmouthshire and also of the historic counties of Brecon and Monmouth. The river and its major tri ...

(L) *** Grwyne Fechan (R) **

Rhiangoll The Rhiangoll is a river in the Brecon Beacons National Park in Powys, Wales. It rises on the western slopes of Waun Fach, highest point of the Black Mountains (Welsh: Y Mynyddoedd Duon) and drops steeply down to the west into the north–south ...

(L) ** Nant Cleisfer (R) **

Afon Crawnon The Afon Crawnon is a river in the Brecon Beacons National Park in the county of Powys, Wales. The headwaters rise on the hills north of Trefil and flow northeast down a valley known as Dyffryn Crawnon for 7 km to a confluence with the River ...

(R) **

Caerfanell The Caerfanell is a river which rises in the central section of the Brecon Beacons National Park in Powys, Wales. It rises as Blaen Caerfanell on the plateau of Gwaun Cerrig Llwydion and drops steeply down southeastwards into the head of Glyn Col ...

(R) **

Nant Menasgin The Nant Menasgin is a short river in Powys, Wales whose headwaters rise in Cwm Oergwm, beneath Fan y Bîg, in the central Brecon Beacons, and flow northeastwards via Llanfrynach, to join the River Usk at Pencelli. The stream in Cwm Oergwm is jo ...

(R) **

Afon Cynrig The Afon Cynrig is a river in Powys, Wales whose headwaters rise in the central Brecon Beacons and flow northwards to join the River Usk at Abercynrig just east of Brecon. Two rivers combine to form the Cynrig just above Cantref - these being ...

(R) **

River Honddu The River Honddu ( cy, Afon Honddu) (pronounced ''hon-thee'') is a river in the Black Mountains within the Brecon Beacons National Park, southeast Wales. Early recorded versions of the name are of the form ''Hothenei'' and ''hodni'' which are be ...

(L) **

Afon Tarell The Afon Tarell is a river in Powys, Wales, which rises to the west of the Brecon Beacons in Brecon Beacons National Park and flows north, then north-east, for into the River Usk. The river is followed for its entire length through Glyn Tarell ( ...

(R) *** Nant Cwm Llwch **

Afon Ysgir The Afon Ysgir is a river which rises on the southern slopes of Mynydd Epynt in Powys, Wales. The tributaries known as Ysgir Fawr and Ysgir Fechan flow past the hamlets of Pont Rhyd-y-berry and Merthyr Cynog to combine at Pont-faen and continu ...

(L) **

Nant Brân The Nant Brân is a short river which rises on the southern slopes of Mynydd Epynt in Powys, Wales. The word 'brân' means 'crow' in Welsh: the name may therefore allude to the dark colour of its waters. Its upper reaches are within the military ...

(L) **

Afon Cilieni The Afon Cilieni is a short river which rises on the southern slopes of Mynydd Epynt in Powys, Wales. The name may mean ' the river rising in a small nook'. Its upper reaches are within the military training area of SENTA, the British Army's Senn ...

(L) **

Afon Senni The Afon Senni is a river in Powys, Wales which rises in the Fforest Fawr section of the Brecon Beacons National Park and flows northwards for to a confluence with the River Usk at Sennybridge. The river rises as Blaen Senni to the north of the ...

(R) **

Afon Crai The Afon Crai is a river in Powys, Wales rising in the Fforest Fawr section of the Brecon Beacons National Park and flowing north into the River Usk. The headwaters known as Blaen-crai flow north from Bwlch Bryn-rhudd, a col between the Crai ...

(R) ** Afon Hydfer (R)

Wye catchment

(Afon Gwy) **

River Trothy The River Trothy ( cy, Afon Troddi) is a river which flows through north Monmouthshire, in rural south east Wales. The river rises on Campston Hill, northeast of Abergavenny. It flows southwards until Llanvapley, where it turns east. About so ...

(R) ** River Monnow (Afon Mynwy) (R) ***

River Dore The River Dore (Welsh: ''Afon Aur'' lit: 'the river of gold') is a tributary of the River Monnow in Herefordshire, England. It rises on Cusop Hill, in the foothills of the Black Mountains, close to the border between England and Wales. It fl ...

(L) ****

Dulas Brook Dulas may refer to: Places *Dulas, Anglesey, Wales **Dulas Bay, nearby * Dulas, Herefordshire, England Rivers *Afon Dulas, two rivers (North Dulas and South Dulas), tributaries of the Afon Dyfi in Mid Wales *Afon Dulas, Llanidloes, a headwater tr ...

(R) **** Worm Brook (L) ***

(R) ***

Olchon Brook Olkhon ( rus, Ольхо́н, also transliterated as Olchon; bua, Ойхон, ''Oikhon'') is the third-largest lake island in the world. It is by far the largest island in Lake Baikal in eastern Siberia, with an area of . Structurally, it const ...

(R) *** Escley Brook (L) ** River Lugg (L) (Afon Llugwy) *** River Frome (L) ***

River Kenwater The River Kenwater or simply Kenwater is a short anabranch of the River Lugg, i.e. it splits from and later re-joins that river. It separates from it about 2 kilometres north-west of Leominster Leominster ( ) is a market town in Herefordshi ...

*** River Arrow (R) **** Cynon Brook *****

Gilwern Brook Gilwern is a village within the Brecon Beacons National Park in Monmouthshire, Wales. Historically in Brecknockshire, it extends to either side of the River Clydach on the south side of the Usk valley. Its position beside the Monmouthshire and ...

****

Gladestry Brook Gladestry ( cy, Llanfair Llythynwg) is a small village and community in Radnorshire, Powys, mid-Wales, close to the border with England at the end of the Hergest Ridge and south of the large moorland area of Radnor Forest. People living in Gladest ...

(R) ** Afon Llynfi (R) *** River Ennig (R) *** Dulas (L) **** Triffrwd (L) **

Bachawy The Bachawy ( cy, Nant Bachawy) (or Bach Howey on Early Ordnance Survey maps.) is a minor river in Powys, Wales. It rises in the hills north of Painscastle, flowing initially to the southeast before turning to the southwest at Rhos-goch, assumin ...

(L) **

Afon Edw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) **

Duhonw Duhonw is a rural community in Powys, Wales, to the south of Builth Wells ( cy, Llanfair ym Muallt), in the historic county of Breconshire. Covering an area of and including scattered farms and dwellings, it is bounded to its north by the Afon I ...

(R) ** Afon Irfon (R) ***

Afon Chwerfri This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) *** Dulas (L) ***

Afon Cammarch This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) *** Afon Dulas (R) ***

Afon Gwesyn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) **

River Ithon A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

(L) (Afon Ieithon) *** Dulas (R) ***

Clywedog Brook Clywedog may refer to: * Afon Clywedog, a tributary of the River Severn at Llanidloes * River Clywedog, a tributary of River Dee near Wrexham * A tributary of the Afon Wnion in Gwynedd * Clywedog Reservoir, a reservoir in Powys * River Clywedog, De ...

(R) ***

Afon Aran This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(L) ***

(L) **

Afon Elan The Afon Elan ( en, River Elan) is a tributary of the River Wye which runs through the wide expanse of upland moors, traditionally known as Elenydd, in central Wales. Its valley is the Elan Valley. The name probably arises from ''elain'' meani ...

(R) ***

Afon Claerwen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) **** Rhiwnant (R) ****

Afon Arban This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) ****

Afon Claerddu This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** Afon Gwngu (R) **

Afon Marteg The Afon Marteg is a river in Powys, Wales. It is about 15 km long, flowing roughly south-west to join the Wye at Pont Marteg (grid reference SN952714) about 5 km above Rhayader. Fishing is available, with appropriate permits, for b ...

(L) **

Afon Bidno This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) ** Afon Tarennig (R)

Severn catchment

With the exception of a small part of the Rea Brook, all tributaries of the Severn downstream of the confluence of the Severn and the Vyrnwy are wholly in England. For details see

List of rivers of England This is a list of rivers of England, organised geographically and taken anti-clockwise around the English coast where the various rivers discharge into the surrounding seas, from the Solway Firth on the Scottish border to the Welsh Dee on the Wel ...

. *

River Severn , name_etymology = , image = SevernFromCastleCB.JPG , image_size = 288 , image_caption = The river seen from Shrewsbury Castle , map = RiverSevernMap.jpg , map_size = 288 , map_c ...

(Afon Hafren),

Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Seve ...

(Mor Hafren) ** Rea Brook (R) (small parts of upper catchment in Wales) ** River Vyrnwy (L) (Afon Efyrnwy) (lowermost section in England) *** Afon Tanat (L) (lowermost section in England) ****

Cynllaith Cynllaith or Cynllaeth was a ''cwmwd'' (commote) of north east Wales in the cantref of Swydd y Waun which was once part of the Kingdom of Powys and later part of the smaller kingdom of Powys Fadog. Cynllaith, or at least the part of it called '' ...

(L) (part forms the border between Wales and England) *****

Afon Ogau This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

****

(L) ****

Afon Rhaeadr The River Rhaeadr ( cy, Afon Rhaeadr) is a river in Wales. It starts at the Pistyll Rhaeadr waterfall a few miles from the village of Llanrhaeadr-ym-Mochnant, where the Afon Disgynfa falls over a 240-foot (73 m) cliff-face, after which the riv ...

(L) ****

Afon Eirth This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) *** Afon Cain (L) **** Nant Fyllon (Ls) **** Nant Alan (Rs) ***

Afon Banwy The River Banwy is a river about long in Powys, Wales. It is a tributary of the River Vyrnwy. The Banwy rises in the hills near the pass which takes the A458 road between Mallwyd and Welshpool. The river is called Nant Cerrig-y-groes at its ...

(R) (a.k.a. Afon Einion) ****

(R) ****

(R) **** Afon Twrch (L) **

Maerdy Brook Maerdy (, cy, Y Maerdy) is a village and community (and electoral ward) in the county borough of Rhondda Cynon Taf, and within the historic county boundaries of Glamorgan, Wales, lying at the head of the Rhondda Fach Valley. History "Maerdy" i ...

(L) ** New Cut/Guilsfield Brook (L) ** Luggy Brook (L) **

Camlad The River Camlad (or just Camlad) is a minor river in Powys and Shropshire. It forms part of the border between Wales and England in places, before flowing into the River Severn. It is notable for being the only river to cross from England into ...

(R) (partly in England) **

River Rhiw The River Rhiw ( cy, Afon Rhiw meaning 'slope river' or 'stream river') is a short river in the north of Powys in Wales. Two headwater tributaries both named Afon Rhiw flow east to join at Dwyrhiew and then continue in a generally easterly direc ...

(Afon Rhiw) (L) ***

Afon Rhiw This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstr ...

(north fork) (Rs) ***

(south fork)(Ls) ** Llifior Brook (L) ** The Mule (R) (Afon Miwl) **

Bechan Brook Winand Kiran Madhankumar Bechan (born 12 September 1982), simply known as Kiran Bechan, is a Dutch former professional footballer who played as a midfielder. Club career Bechan was a product of the Ajax football academy, which he joined at under ...

(L) **

Mochdre Brook Mochdre may refer to: *Mochdre, Conwy, north Wales *Mochdre, Powys Mochdre () is a small village and larger community in Montgomeryshire, Powys, Wales. The community includes Penstrowed (which claims to be the smallest hamlet in Wales) and th ...

(R) ** Nant Rhyd-ros lan?? **

Afon Carno The River Carno ( cy, Afon Carno) is a river in Powys, mid Wales, and a tributary of the River Severn. The river is named after the village of Carno, which is close to the source in the foothills of the Cambrian Mountains. From Carno it flows ...

(L) ***

Afon Cerniog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ***

(R) **

Afon Trannon This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) *** Afon Cerist (R) ****

Colwyn Brook Colwyn was a local government district with borough status from 1974 to 1996, being one of six districts in the county of Clwyd, north-east Wales. History The borough was created on 1 April 1974, under the Local Government Act 1972. It covered ...

(L) ** Nant Feinion (R) ** Wigdwr Brook (L) **

(L) ***

Afon Biga This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) (flows into Clywedog Reservoir) ***

(R) (flows into Clywedog Reservoir) ** Afon Dulas (R) ***

Afon Brochan This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) *** Nant Cydros (R) *** Rhydyclwydau Brook (R)

Longest rivers in Wales

This is a table of the longest rivers wholly or partially in Wales.Encyclopædia Britannica. 1911. "Wales" Rivers only partly in Wales are included in this table in ''italics''. Note that river lengths given by different authorities vary due to the different ways in which the measurement is made or indeed estimated. That rivers are partly

fractal In mathematics, a fractal is a geometric shape containing detailed structure at arbitrarily small scales, usually having a fractal dimension strictly exceeding the topological dimension. Many fractals appear similar at various scales, as illu ...

in nature accounts for some variation and lengths can also vary slightly over time as meanders expand or are cut off where rivers run through broad flood-plains.

References

{{Authority control

Rivers of Wales

Mainland rivers flowing into Liverpool Bay

Dee catchment

Clwyd catchment

Conwy catchment

Simple coastal catchments

Aber catchment

Ogwen catchment

Cegin catchment

Adda catchment

Isle of Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island ... rivers

Minor coastal catchments

Crigyll catchment

Ffraw catchment

Cefni catchment

Braint (i) catchment

Braint (ii) catchment

Seiont catchment

Gwyrfai catchment

Simple coastal catchments

Rivers flowing into Cardigan Bay

Daron catchment

Soch catchment

Rhyd-hir catchment etc

Dwyfor catchment

Glaslyn catchment

Artro catchment

Ysgethin catchment

Mawddach catchment

Dysynni catchment

Dyfi catchment

Clarach catchment

Rheidol catchment

Ystwyth catchment

Wyre catchment

Cledan catchment

Arth catchment

Aeron catchment

Coastal streams

Teifi catchment

Nyfer catchment etc

Minor coastal catchments

Rivers flowing to west Pembrokeshire coast

Minor catchments

Cleddau catchment

Rivers flowing into the Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Seve ...

Taf catchment

Towy catchment

Gwendraeth catchment

Lliedi catchment

Loughor catchment

Clyne catchment

Tawe catchment

Neath catchment

Afan catchment

Kenfig catchment

Ogmore catchment

Col-huw catchment

Thaw catchment

Cadoxton catchment

Taff catchment

Rhymney catchment

Usk catchment

Wye catchment

Severn catchment

Longest rivers in Wales

See also

References

Isle of
Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island ...
rivers

Rivers flowing into the
Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Seve ...