Celtic Sea water temperature

Celtic Sea, Perranporth · Sea/Coast

The current water temperature at Celtic Sea is 19.6 °C (as of September 1, 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.

19.6 °C

Measured: September 1, 2026 · continuously updated

💧 Water 19.6° · ☀️ Air 16.6° · high today 17.9°

Temperature trend of recent weeks

Celtic Sea — Photo: Niki Walton · CC BY-SA 2.0 · Wikimedia Commons

Nearby waters

Atlantic, Perran Beach · 0.3 km away18.0 °C Bolingey Stream, Perranporth Sand Bay · 0.3 km away16.5 °C Perranporth Beach Stream, Promenade · 0.4 km away17.1 °C Celtic Sea, Perranporth (penhale Sands) Beach · 1.1 km away20.6 °C Atlantic, Perranporth · 1.4 km away18.0 °C

More measuring points: Celtic Sea

Booby'S Bay22.5 °C Constantine Bay Beach22.2 °C Summerleaze21.9 °C Wherry Town21.6 °C Porthcurno Beach21.4 °C Crooklets21.2 °C

Frequently asked questions

Can you swim at Celtic Sea right now?
The current water temperature is 19.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Celtic Sea?
Currently 19.6 °C (updated continuously).

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