Wales — Water Temperature Today and Throughout the Year
Discover water temperatures in Wales (United Kingdom), with real-time data and annual trends. Find all locations in the region and check the water temperature in them. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
- Barry16°C
- Dinas Dinlle14°C
- Aberdyfi15°C
- Swansea15°C
- Tywyn15°C
- Milford Haven14°C
- Tenby14°C
- Aberystwyth15°C
- Porthmadog15°C
- Aberporth14°C
- Barmouth15°C
- Holyhead13°C
- Prestatyn15°C
- Rhos on Sea14°C
- Llanbedrog15°C
- New Quay14°C
- Porthcawl15°C
- Fishguard13°C
- Trefor14°C
- Solva13°C
- Southerndown15°C
- Caernarfon14°C
- Llansteffan15°C
- Saundersfoot14°C
- Penmon13°C
- Morfa Nefyn14°C
- Cilan Uchaf15°C
- Penarth16°C
- Abersoch15°C
- Cardiff16°C
- Abereiddy13°C
- Llandudno14°C
Coastal Seas and Oceans
Water Temperature in Lakes and Rivers
Popular Lakes
Popular Rivers
Popular Places
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
The sea temperature along the coast of Wales varies throughout the year, influenced by the Atlantic Ocean and the Irish Sea. During the summer months, from June to September, water temperatures typically range between 14–18°C (57–64°F), with the warmest conditions found in the southwest, around Pembrokeshire and the Gower Peninsula. The waters of Cardigan Bay and Anglesey tend to be slightly cooler but can still reach 16–17°C (61–63°F) during peak summer. Compared to the rest of the UK, Welsh coastal waters are relatively mild, making them popular for swimming and water sports during the warmer months.
In winter, from December to March, sea temperatures drop significantly, ranging between 7–11°C (45–52°F). The coldest waters are usually found in February and early March, when temperatures can dip as low as 7°C (45°F) along exposed coastal areas. Despite the chill, Wales has a strong sea swimming culture, with groups of open-water swimmers regularly braving the cold, particularly in sheltered bays and estuaries. Wetsuits are common outside of summer, but many experienced swimmers take on the challenge of cold-water swimming, drawn by the rugged beauty of the Welsh coastline.