Celtic Sea water temperature

Celtic Sea, Swanpool Beach · Sea/Coast

The current water temperature at Celtic Sea is 21.8 °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.

21.8 °C

Measured: August 17, 2026 · continuously updated

💧 Water 21.8° · ☀️ Air 15.7° · high today 18.6°

Temperature trend of recent weeks

Nearby waters

Celtic Sea, Gyllyngvase Beach · 0.7 km away21.4 °C Celtic Sea, Maenporth Beach · 2.2 km away20.6 °C Celtic Sea, Porthallow Beach · 8.0 km away19.9 °C Celtic Sea, Porthcurnick Beach · 8.9 km away21.2 °C Celtic Sea, Porthoustock Beach · 9.5 km away19.2 °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 Gyllyngvase Beach21.4 °C

Frequently asked questions

Can you swim at Celtic Sea right now?
The current water temperature is 21.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Celtic Sea?
Currently 21.8 °C (updated continuously).

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