Celtic Sea, Porthallow Beach · Sea/Coast
The current water temperature at Celtic Sea is 21.0 °C (as of June 24, 2026, source: official monitoring networks).
Can you swim at Celtic Sea right now?
The current water temperature is 21.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Celtic Sea?
Currently 21.0 °C (updated continuously).