Sea Area Forecast
Forecast valid from: 00:00, Thursday 04 December 2025 until 00:00, Friday 05 December 2025
Small Craft Warning
Southerly winds veering westerly will reach force 6 or higher at times tonight on all Irish coasts, becoming confined to coasts from Mizen Head to Slyne Head to Malin Head tomorrow morning.
Gale Warning
Southerly winds veering westerly will reach gale force 8 at times tonight on Irish coastal waters from Strangford Lough to Carnsore Point to Valentia and on the Irish Sea.
Atlantic Swell
On Atlantic coasts on Thursday.
Meteorological Situation at 21:00 UTC
Ireland lies in a fresh to strong south to southwest airflow generated by a broad depression of 974hPa centred south of Iceland. The associated occlusion will track across Ireland tonight.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Malin Head to Howth Head to Roche's Point and for the Irish Sea
Wind: Southerly force 6 or 7, occasionally reaching gale force 8. Decreasing westerly force 4 or 5 imminent but becoming cyclonic variable force 6 or 7 on the north Irish Sea. Soon becoming west to northwest force 3 or 4, occasionally reaching force 5. Later becoming westerly.
Weather: Widespread rain, occasionally turning heavy. Becoming cloudy to fair with isolated showers later.
Visibility: Moderate or poor in precipitation, otherwise good.
Forecast for Irish coastal waters from Roche's Point to Slyne Head to Malin Head
Wind: Westerly force 5 or 6, occasionally reaching force 7. Soon becoming west to southwest.
Weather: Becoming cloudy to fair with scattered showers imminent, some heavy with a chance of hail and isolated showers.
Visibility: Moderate or poor in precipitation, otherwise good.
Outlook for a further 24 hours until 00:00, Saturday 06 December 2025
Fresh to near gale force westerly winds, backing southerly and increasing strong to gale force on Friday morning. Reaching strong gale force at times Friday afternoon. Weather: Cloudy to fair with showers. Rain on Friday morning and afternoon, heavy at times with isolated thunderstorms possible. Showers on Friday night.
Forecast issued at: 00:00, Thursday 04 December 2025
All times are local unless specified
