Sea Area Forecast
Forecast valid from: 06:00, Tuesday 16 September 2025 until 06:00, Wednesday 17 September 2025
Small Craft Warning
1. Westerly winds will reach force 6 for a time this morning (Tuesday) on Irish coasts from Rossan Point to Belfast Lough to Wicklow Head. 2. From Tuesday evening, see gale warning.
Gale Warning
Southeasterly winds, veering southwesterly will reach gale force 8 from this evening (Tuesday) on all Irish coastal waters and on the Irish Sea.
Meteorological Situation at 03:00 UTC
A depression of 989hPa, centred over the North Sea and an anticyclone of 1027hPa, centred to the west of Portugal, generate a mostly fresh to strong westerly airflow over Ireland.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : Nil
Forecast for Irish coastal waters from Carnsore Point to Valentia to Rossan Point
Wind: Decreasing westerly force 3 or 4 imminent. Soon backing southerly and increasing force 4 to 6. Later increasing southeasterly force 6 to gale force 8 before veering southwesterly.
Weather: Becoming cloudy imminent with outbreaks of rain spreading from the southwest, heavy at times later. Some fog patches too.
Visibility: Decreasing moderate or poor in precipitation and fog.
Forecast for Irish coastal waters from Rossan Point to Malin Head to Belfast Lough
Wind: Decreasing westerly force 4 or 5 imminent, occasionally force 6. Soon decreasing force 3 or 4. Later increasing southeasterly force 6 to gale force 8.
Weather: Cloudy to fair with isolated showers imminent. Cloudy later with outbreaks of rain spreading from the southwest.
Visibility: Decreasing moderate or poor in precipitation.
Forecast for Irish coastal waters from Belfast Lough to Howth Head to Carnsore Point and for the Irish Sea
Wind: Decreasing westerly force 4 to 6 imminent, strongest on the north Irish Sea. Soon decreasing force 4 or 5. Later increasing southerly force 6 to gale force 8.
Weather: Cloudy to fair imminent with isolated showers. Cloudy later with outbreaks of rain spreading from the southwest, heavy at times.
Visibility: Decreasing moderate or poor in precipitation.
Outlook for a further 24 hours until 06:00, Thursday 18 September 2025
Strong to gale force southeasterly winds, veering southwesterly. Winds will ease mostly moderate to strong through Tuesday night before increasing strong to near gale force in southern sea areas by the end of the period. Weather: Outbreaks of rain, clearing northeastwards Wednesday morning, with fog patches possible in the south at first. Showery outbreaks of rain will move up from the south Wednesday night.
Forecast issued at: 06:00, Tuesday 16 September 2025
All times are local unless specified
