Sea Area Forecast
Forecast valid from: 00:00, Tuesday 09 December 2025 until 00:00, Wednesday 10 December 2025
Small Craft Warning
East to southeast winds, gradually veering southwesterly, will reach force 6 on all Irish coasts through the period.
Gale Warning
Southerly winds, later veering southwesterly, will reach gale force 8 or strong gale force 9 through the period on all Irish coastal waters and on the Irish Sea, increasing to storm force 10 or violent storm force 11 on Irish coastal waters from Mizen Head to Slyne Head to Malin Head.
Atlantic Swell
On southern, western and northwestern coats.
Meteorological Situation at 21:00 UTC
A broad and complex area of low pressure over the mid-Atlantic, with multiple centres, generates a moderate to fresh south to southeast airflow across Ireland. A centre to the south of the low pressure region will intensify and track to the west of Ireland through the period, evolving into Storm Bram.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Slyne Head to Malin Head to Strangford Lough
Wind: Imminent increasing east to southeast force 6 or near gale force 7. Soon veering southeasterly and reaching gale force 8 at times. Later increasing south to southwest strong gale force 9 or storm force 10, possibly touching violent storm force 11 at times. Decreasing mostly southwesterly near gale force 7 or gale force 8 by the of the period.
Weather: Widespread rain imminent, with a chance of thunderstorms. Rain soon becoming patchier before clearing to showers with a continuing chance of thunderstorms by the end of the period. Mist patches too.
Visibility: Decreasing moderate or poor in precipitation or mist, otherwise good.
Forecast for Irish coastal waters from Strangford Lough to Roches Point Slyne Head and for the Irish Sea
Wind: Imminent increasing southerly near gale force 7 or gale force 8. Soon increasing south to southwest gale force 8 or strong gale force 9, but reaching storm force 10 and possibly violent storm force 11 west of Mizen Head. Later decreasing southwesterly force 6 or 7, but still reaching gale force 8 in the north Irish Sea.
Weather: Widespread rain imminent, with a chance of thunderstorms. Rain soon becoming patchier before later clearing to showers with a continuing chance of thunderstorms. Mist patches too.
Visibility: Decreasing moderate or poor in precipitation or mist, otherwise good.
Outlook for a further 24 hours until 00:00, Thursday 11 December 2025
Mostly strong to near gale force southwesterly winds, but reaching gale force at times. Weather: Cloudy to fair with scattered showers, some heavy with a chance of hail and thunderstorms.
Forecast issued at: 00:00, Tuesday 09 December 2025
All times are local unless specified
