Irish Sea water temperature

Irish Sea, Ainsdale at Ainsdalesefton Mbc · Sea/Coast

The current water temperature at Irish Sea is 15.7 °C (as of September 8, 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.

15.7 °C

Measured: September 8, 2026 · continuously updated

💧 Water 15.7° · ☀️ Air 14.6°

Temperature trend of recent weeks

Irish Sea — Photo: Mike Pennington · CC BY-SA 2.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 8 data points since July 26, 2026.

Lowest recorded value: 15.7 °C on September 8, 2026 · highest value: 22.2 °C on August 13, 2026.

Nearby waters

Irish Sea, Southport at Southportsefton Mbc · 5.6 km away14.8 °C Irish Sea, Formby at Formbysefton Mbc · 7.2 km away17.8 °C Irish Sea, St.annes at St.annes Pierfylde Mbc · 15.8 km away16.4 °C Irish Sea, St Annes North at Starr Hills · 16.9 km away16.5 °C Irish Sea, Mersey- New Brighton Beach East · 18.6 km away15.3 °C

More measuring points: Irish Sea

Cleveleys at Cleveleyswyre Mbc18.6 °C Formby at Formbysefton Mbc17.8 °C Liverpool Bay17.1 °C Blackpool Central at St Chad'S Road17.0 °C St Annes North at Starr Hills16.5 °C Bispham at Bisphamblackpool Mbc16.4 °C

Frequently asked questions

Can you swim at Irish 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 Irish Sea?
Currently 15.7 °C (updated continuously).

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