Celtic Sea water temperature
Celtic Sea, Carnsore Point (Barrels-Boje) · Sea/Coast
The current water temperature at Celtic Sea is 15.7 °C (as of October 15, 2026, source: Commissioners of Irish Lights).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
Measurement series & statistics
This measurement series includes 726 data points since September 15, 2026.
Lowest recorded value: 15.5 °C on October 11, 2026 · highest value: 16.8 °C on September 20, 2026.
In October, temperatures have ranged between 15.5 °C and 16.3 °C.
The current value is 0.3 °C below the October average of this series.
Nearby waters
More measuring points: Celtic Sea
Frequently asked questions
Can you swim at Celtic Sea right now?
The current water temperature is 15.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Celtic Sea?
Currently 15.7 °C (updated continuously).
How warm is at Celtic Sea in October?
In October, the water temperature recently averaged 16.0 °C.
