Tremadog Bay is a large inlet of

Cardigan Bay Cardigan Bay ( cy, Bae Ceredigion) is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales. Geograp ...

, defined by the north

Cambrian Coast The Cambrian Line ( cy, Llinell y Cambrian), also known as the Cambrian Main Line ( cy, Prif Linell y Cambrian) and Cambrian Coast Line ( cy, Llinell Arfordir y Cambrian), is a railway line that runs from Shrewsbury, England, westwards to Ab ...

and the

Llŷn Peninsula The Llŷn Peninsula ( cy, Penrhyn Llŷn or , ) extends into the Irish Sea from North West Wales, south west of the Isle of Anglesey. It is part of the historic county of Caernarfonshire, and historic region and local authority area of Gwynedd. Mu ...

of north

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 ...

. The

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 ...

flows into the north of the bay and

Saint Tudwal's Islands Saint Tudwal's Islands (Welsh: Ynysoedd Tudwal) are a small archipelago lying south of Abersoch on the Llŷn Peninsula in North Wales, at the western end of Tremadog Bay. They were referred to as the Studwells in the early 19th century. The na ...

lie at the western end of the bay.

Pwllheli Pwllheli () is a market town and community of the Llŷn Peninsula ( cy, Penrhyn Llŷn) in Gwynedd, north-western Wales. It had a population of 4,076 in 2011 of whom a large proportion, 81%, are Welsh language, Welsh speaking. Pwllheli is the pl ...

, the main

market town A market town is a settlement most common in Europe that obtained by custom or royal charter, in the Middle Ages, a market right, which allowed it to host a regular market; this distinguished it from a village or city. In Britain, small rural ...

of the Llŷn Peninsula, together with the historic towns of

Harlech Harlech () is a seaside resort and community in Gwynedd, north Wales and formerly in the historic county of Merionethshire. It lies on Tremadog Bay in the Snowdonia National Park. Before 1966, it belonged to the Meirionydd District of the 197 ...

and

Criccieth Criccieth ( cy, Criccieth ) is a town and community on the Llŷn Peninsula in the Eifionydd area of Gwynedd in Wales. The town lies west of Porthmadog, east of Pwllheli and south of Caernarfon. It had a population of 1,826 in 2001, reducing ...

, and

Abersoch Abersoch is a village in the community of Llanengan in Gwynedd, Wales. It is a popular coastal seaside resort, with around 800 residents, on the east-facing south coast of the Llŷn Peninsula at the southern terminus of the A499. It is about ...

, a popular location for water sports, all lie on its shores.

External links

Overview of its marine biology
* Cardigan Bay {{Gwynedd-geo-stub