Ireland: water temperature

At sea, 13.5 °C on average across 8 stations, from 10.8 °C (Bouée de Lehanagh Pool (Connemara)) to 15.3 °C (K1 Buoy).

See on the map

Sea and ocean

Where to swim, month by month

The normal sea temperature each month along the coast: pick a month to see where the water is warmest and whether you can swim.

• January 9.9 °C · up to 10.4 °C
• February 9.4 °C · up to 10.2 °C
• March 9.4 °C · up to 10.2 °C
• April 10.0 °C · up to 10.6 °C
• May 11.5 °C · up to 12.1 °C
• June 13.6 °C · up to 14.5 °C
• July 15.2 °C · up to 16.4 °C
• August 15.8 °C · up to 16.5 °C
• September 15.0 °C · up to 15.7 °C
• October 13.7 °C · up to 14.3 °C
• November 12.2 °C · up to 12.8 °C
• December 10.8 °C · up to 11.2 °C

Warmest water today

Where these numbers come from

Every value is a real reading from an instrument, at its position: a buoy, a wharf, a river or lake station. It keeps the time it was measured. A reading too far from those of nearby stations is marked with a “?”. Between stations, the map gives a satellite or model estimate, always labelled as such.

Sources: Bouées d'Irlande, NOAA NDBC. Sources and credits

Nearby

• United Kingdom 111 stations · sea 13.8 °C · fresh water 10.4 °C
• Netherlands 90 stations · sea 13.2 °C · fresh water 12.2 °C
• France 18 stations · sea 17.6 °C
• Denmark 29 stations · sea 11.4 °C
• Germany 132 stations · sea 11.2 °C · fresh water 11.0 °C
• Switzerland 91 stations · fresh water 10.5 °C