Celtic Sea water temperature

Celtic Sea, Porthcothan Beach · Sea/Coast

The current water temperature at Celtic Sea is 20.6 °C (as of August 17, 2026, source: official monitoring networks).

The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.

20.6 °C

Measured: August 17, 2026 · continuously updated

💧 Water 20.6° · ☀️ Air 16.9° · high today 18.0°

Temperature trend of recent weeks

Nearby waters

Celtic Sea, Treyarnon Bay Beach · 1.9 km away20.5 °C Celtic Sea, Constantine Bay Beach · 2.7 km away22.2 °C Celtic Sea, Booby'S Bay · 3.3 km away22.5 °C Celtic Sea, Harlyn Bay Beach · 3.9 km away22.2 °C Celtic Sea, Mother Ivey'S Bay · 3.9 km away21.9 °C

More measuring points: Celtic Sea

Booby'S Bay22.5 °C Constantine Bay Beach22.2 °C Harlyn Bay Beach22.2 °C Pendower Beach22.0 °C Mother Ivey'S Bay21.9 °C Swanpool Beach21.8 °C

Frequently asked questions

Can you swim at Celtic Sea right now?
The current water temperature is 20.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Celtic Sea?
Currently 20.6 °C (updated continuously).

← All waters