Irish Sea water temperature

Irish Sea, St.bees at St.beescopeland Mbc · Sea/Coast

The current water temperature at Irish Sea is 16.1 °C (as of September 10, 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.

16.1 °C

Measured: September 10, 2026 · continuously updated

💧 Water 16.1° · ☀️ Air 13.4° · high today 14.4°

Temperature trend of recent weeks

Irish Sea — Photo: John Gibson · CC BY-SA 2.0 · Wikimedia Commons

Measurement series & statistics

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

Lowest recorded value: 16.1 °C on September 10, 2026 · highest value: 19.8 °C on August 3, 2026.

In September, temperatures have ranged between 16.1 °C and 17.5 °C.

Nearby waters

Ehen, Oxbow · 11.9 km away14.4 °C Ehen, Bleach Green · 13.0 km away14.5 °C Irish Sea, Seascale at Seascale Northcopeland Mbc · 13.0 km away15.4 °C Derwentwater, Keswick · 32.3 km away17.6 °C Irish Sea, Allonby at West Windsallerdale Mbc · 32.9 km away15.5 °C

More measuring points: Irish Sea

Cleveleys at Cleveleyswyre Mbc18.6 °C Formby at Formbysefton Mbc17.8 °C Walney Biggar Bank at Biggar Bankbarrow-In-Furness Mbc17.8 °C Walney Sandy Gap at Sandy Gapbarrow-In-Furness Mbc17.7 °C Southport at Southportsefton Mbc17.2 °C Blackpool Central at St Chad'S Road17.0 °C

Frequently asked questions

Can you swim at Irish Sea right now?
The current water temperature is 16.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Irish Sea?
Currently 16.1 °C (updated continuously).

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