Irish Sea water temperature

Irish Sea, South Hunter (Larne) · Sea/Coast

The current water temperature at Irish Sea is 14.7 °C (as of October 14, 2026, source: Commissioners of Irish Lights).

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

14.7 °C

Measured: October 14, 2026 · continuously updated

💧 Water 14.7° · ☀️ Air 15.5°

Temperature trend of recent weeks

Nearby waters

Irish Sea, Briggs (Belfast Lough) · 23.6 km away14.3 °C Lough Neagh, Rea's Wood, Antrim · 35.9 km away14.0 °C Lough Neagh, Toome · 47.2 km away13.8 °C Atlantic, Portrush · 67.9 km away14.0 °C Lough Neagh, Washing Bay · 70.7 km away13.3 °C

More measuring points: Irish Sea

Cleveleys at Cleveleyswyre Mbc18.6 °C Formby at Formbysefton Mbc17.8 °C Southport at Southportsefton Mbc17.2 °C Allonby at West Windsallerdale Mbc17.1 °C Ainsdale at Ainsdalesefton Mbc16.6 °C St Annes North at Starr Hills16.5 °C

Frequently asked questions

Can you swim at Irish Sea right now?
The current water temperature is 14.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Irish Sea?
Currently 14.7 °C (updated continuously).

How warm is at Irish Sea in October?
In October, the water temperature recently averaged 14.7 °C.

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