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Celtic Sea water temperature

Celtic Sea, Mexico Towans · Sea/Coast

The current water temperature at Celtic Sea is 16.6 °C (as of September 18, 2026, source: Environment Agency).

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

16.6 °C
Measured: September 18, 2026 · continuously updated
💧 Water 16.6° · ☀️ Air 13.5° · high today 14.6°
Temperature trend of recent weeks
Celtic Sea
Photo: Peter Jemmett · CC BY-SA 2.0 · Wikimedia Commons

Nearby waters

Celtic Sea, Hayle Towans · 0.6 km away16.6 °CCeltic Sea, Porth Kidney Sands · 1.4 km away18.2 °CCeltic Sea, Upton Towans · 1.4 km away17.3 °CCeltic Sea, Carbis Bay · 2.9 km away18.1 °CCeltic Sea, Gwithian Towans · 3.8 km away17.6 °C

More measuring points: Celtic Sea

Fistral South21.0 °CTolcarne Beach (newquay)19.6 °CCrantock Beach19.5 °CHarlyn Bay Beach19.4 °CPerranporth (penhale Sands) Beach19.4 °CMother Ivey'S Bay19.3 °C

Frequently asked questions

Can you swim at Celtic Sea right now?
The current water temperature is 16.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Celtic Sea?
Currently 16.6 °C (updated continuously).

Open in the BrrChecker app

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