Irish Sea water temperature

Irish Sea, Cleveleys at Cleveleyswyre Mbc · Sea/Coast

The current water temperature at Irish Sea is 18.9 °C (as of August 21, 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.

18.9 °C

Measured: August 21, 2026 · continuously updated

💧 Water 18.9° · ☀️ Air 17.3°

Temperature trend of recent weeks

Irish Sea — Photo: Sue Adair · CC BY-SA 2.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 11 data points since July 5, 2026.

Lowest recorded value: 18.0 °C on August 5, 2026 · highest value: 21.6 °C on July 20, 2026.

Nearby waters

Irish Sea, Bispham at Bisphamblackpool Mbc · 3.6 km away18.0 °C Irish Sea, Fleetwood Beach · 5.4 km away21.7 °C Irish Sea, Blackpool · 7.1 km away18.7 °C Irish Sea, Blackpool Central at St Chad'S Road · 8.8 km away17.5 °C Irish Sea, Blackpool South at Pleasure Beach · 10.1 km away17.1 °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 18.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Irish Sea?
Currently 18.9 °C (updated continuously).

← All waters