BrrChecker

Celtic Sea water temperature

Celtic Sea, Sandymouth · Sea/Coast

The current water temperature at Celtic Sea is 20.4 °C (as of August 19, 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.

20.4 °C
Measured: August 19, 2026 · continuously updated
💧 Water 20.4° · ☀️ Air 16.0° · high today 17.2°
Temperature trend of recent weeks
Celtic Sea
Photo: David Robinson · CC BY-SA 2.0 · Wikimedia Commons

Nearby waters

Celtic Sea, Northcott Mouth · 1.4 km away20.3 °CCeltic Sea, Crooklets · 2.8 km away21.2 °CCeltic Sea, Summerleaze · 3.3 km away21.9 °CCeltic Sea, Widemouth Sand · 7.5 km away19.0 °CCeltic Sea, Crackington Haven Beach · 14.3 km away20.2 °C

More measuring points: Celtic Sea

Booby'S Bay22.5 °CConstantine Bay Beach22.2 °CSummerleaze21.9 °CWherry Town21.6 °CPorthcurno Beach21.4 °CCrooklets21.2 °C

Frequently asked questions

Can you swim at Celtic Sea right now?
The current water temperature is 20.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Celtic Sea?
Currently 20.4 °C (updated continuously).

Open in the BrrChecker app

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