Sea Area Forecast
Forecast valid from: 12:00, Tuesday 16 December 2025 until 12:00, Wednesday 17 December 2025
Small Craft Warning
See gale warning.
Gale Warning
Southerly winds will reach gale force 8 or strong gale force 9 at times tonight and tomorrow on all Irish coastal waters and on the Irish Sea.
Atlantic Swell
On Atlantic coasts.
Meteorological Situation at 09:00 UTC
A weak ridge of high pressure extends a moderate to fresh west to southwest airflow over Ireland. A depression of 942hPa south of Greenland will steer fronts across Ireland tonight.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Valentia to Slyne Head to Fair Head
Wind: South to southwest force 4 or 5, reaching force 6 at times. Soon increasing force 7 or gale force 8, touching strong gale force 9 at times. Later decreasing southwest force 5 or 6, occasionally reaching force 7.
Weather: Fair with isolated showers. Rain soon, heavy at times later. Scattered showers by the end of the period.
Visibility: Good, decreasing moderate or poor in precipitation.
Forecast for Irish coastal waters from Fair Head to Howth Head to Valentia and for the Irish Sea
Wind: Southwest force 3 or 4 imminent, soon increasing force 5 or 6. Later increasing force 7 or gale force 8, becoming force 6 to gale force 8.
Weather: Fair with isolated showers. Cloudy to fair soon. Rain later, heavy at times.
Visibility: Good, decreasing moderate or poor in precipitation.
Outlook for a further 24 hours until 12:00, Thursday 18 December 2025
Fresh to near gale force and gusty southwest winds, decreasing moderate to strong on Thursday afternoon and becoming westerly in the southwest and west. Weather: Rain in the southeast, showers elsewhere. Rain clearing to showers on Wednesday night. Heavy rain possible on Thursday.
Forecast issued at: 12:00, Tuesday 16 December 2025
All times are local unless specified
