Sea Area Forecast
Forecast valid from: 12:00, Thursday 18 September 2025 until 12:00, Friday 19 September 2025
Small Craft Warning
South to southwest winds will reach force 6 at times for the rest of today (Thursday) and tonight on Irish coasts from Belfast Lough to Mizen Head to Malin Head, becoming confined to coasts from Howth Head to Carnsore Point to Roches Point overnight
Gale Warning
Nil
Meteorological Situation at 09:00 UTC
A slow moving depression of 998 hPa about 440 nautical miles west of Belmullet, maintains a moderate to fresh southerly airflow over Ireland. An associated warm front moves northwards over Ireland.
Small Craft Warning: In effect
Heavy Swell (>4m) : Nil
Forecast for Irish coastal waters from Roches Pt to Loop Head to Erris Head
Wind: Southerly force 5 to 7, decreasing force 5 or 6 imminent, soon decreasing south to southwest force 4 to 6, later decreasing force 3 or 4, becoming west to southwest force 2 to 4.
Weather: Outbreaks of rain and drizzle with mist and fog patches
Visibility: Moderate to good, decreasing moderate to poor in rain, drizzle, mist and fog.
Forecast for Irish coastal waters from Erris Head to Rossan Pt to Malin Head
Wind: South to southeast force 2 to 4, soon increasing southerly force 5 or 6, later becoming southwesterly and decreasing force 4 or 5 on Friday morning
Weather: Outbreaks of rain and drizzle with mist and fog patches
Visibility: Moderate to good, decreasing moderate to poor in rain, drizzle, mist and fog.
Forecast for Irish coastal waters from Malin Head to Fair Head to Belfast Lough
Wind: South to southwest force 3 or 4, backing southeasterly imminent, soon becoming southerly, later becoming southwesterly
Weather: Outbreaks of rain and drizzle with mist and fog patches
Visibility: Moderate to good, decreasing moderate to poor in rain, drizzle, mist and fog.
Forecast for Irish coastal waters from Belfast Lough to Wicklow Head to Roches Pt and for the Irish Sea
Wind: South to southwest force 5 to 7 south of Howth Head extending to all of the region imminent, strongest on the Irish Sea, later gradually decreasing force 3 to 5
Weather: Outbreaks of rain and drizzle with mist and fog patches. Rain becoming heavier at times overnight
Visibility: Moderate to good, decreasing moderate to poor in rain, drizzle, mist and fog.
Outlook for a further 24 hours until 12:00, Saturday 20 September 2025
Light to moderate south to southwest or variable winds, becoming north to northeast on Friday night and gradually increasing fresh to strong. Fair on west and north coasts apart from a few showers. Rain on east and south coasts, becoming heavy through Friday night and Saturday morning.
Forecast issued at: 12:00, Thursday 18 September 2025
All times are local unless specified
