Irish Sea water temperature

Irish Sea, Llandudno · Sea/Coast

The current water temperature at Irish Sea is 18.7 °C (as of September 1, 2026, source: Open-Meteo marine model).

The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.

18.7 °C

Measured: September 1, 2026 · continuously updated

💧 Water 18.7° · ☀️ Air 12.0° · high today 18.6°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 595 data points since July 3, 2026.

Lowest recorded value: 17.9 °C on July 3, 2026 · highest value: 21.1 °C on August 13, 2026.

Nearby waters

Irish Sea, West Kirby @ Dee Lane · 42.2 km away19.8 °C Irish Sea, Meols at Dove Point Wirral Mbc · 45.5 km away19.6 °C Irish Sea, Moreton at Pasture Roadwirral Mbc · 47.9 km away19.3 °C Irish Sea, Wallasey at Harrison Drive, Wirral Mbc · 51.1 km away19.1 °C Irish Sea, Mersey- New Brighton Beach East · 53.7 km away19.4 °C

More measuring points: Irish Sea

Southport at Southportsefton Mbc26.0 °C Walney Sandy Gap at Sandy Gapbarrow-In-Furness Mbc22.7 °C Walney Biggar Bank at Biggar Bankbarrow-In-Furness Mbc22.6 °C Ainsdale at Ainsdalesefton Mbc22.2 °C St.annes at St.annes Pierfylde Mbc21.9 °C St Annes North at Starr Hills21.9 °C

Frequently asked questions

Can you swim at Irish Sea right now?
The current water temperature is 18.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Irish Sea?
Currently 18.7 °C (updated continuously).

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