Irish Sea water temperature

Irish Sea, Walney Biggar Bank at Biggar Bankbarrow-In-Furness Mbc · Sea/Coast

The current water temperature at Irish Sea is 17.8 °C (as of September 11, 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.

17.8 °C

Measured: September 11, 2026 · continuously updated

💧 Water 17.8° · ☀️ Air 14.8° · high today 16.2°

Temperature trend of recent weeks

Irish Sea — Photo: Jonathan Thacker · CC BY-SA 2.0 · Wikimedia Commons

Measurement series & statistics

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

Lowest recorded value: 16.4 °C on September 8, 2026 · highest value: 22.6 °C on August 13, 2026.

In September, temperatures have ranged between 16.4 °C and 17.8 °C.

Nearby waters

Irish Sea, Walney Sandy Gap at Sandy Gapbarrow-In-Furness Mbc · 0.9 km away17.7 °C Irish Sea, Walney West Shore at West Shorebarrow-In-Furness Mbc · 3.0 km away16.4 °C Irish Sea, Haverigg at Haveriggcopeland Mbc · 10.6 km away16.2 °C Irish Sea, Silecroft at Silecroftcopeland Mbc · 15.0 km away16.1 °C Irish Sea, Morecambe Bay · 17.2 km away16.4 °C

More measuring points: Irish Sea

Cleveleys at Cleveleyswyre Mbc18.6 °C Formby at Formbysefton 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 Liverpool Bay16.9 °C

Frequently asked questions

Can you swim at Irish Sea right now?
The current water temperature is 17.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Irish Sea?
Currently 17.8 °C (updated continuously).

← All waters · Warmest beaches & coasts today · Water temperature in United Kingdom