Sea Area Forecast
Forecast valid from: 18:00, Thursday 18 September 2025 until 18:00, 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 15:00 UTC
A slow moving depression of 994hPa located 460 nautical miles west of Belmullet advects a moderate to fresh southerly airflow over Ireland.
Small Craft Warning: In effect
Heavy Swell (>4m) : Nil
Forecast for Irish coastal waters from Belfast Lough to Carnsore Point to Roche's Point and for the Irish Sea
Wind: Southwest force 5 or 6, reaching force 7 at times in the Irish sea. Soon decreasing force 4 to 6. Later becoming southwest or variable force 3 to 5, reaching force 6 a times in the Irish sea. Easing southwest or variable force 2 to 4 by end of period.
Weather: Rain and drizzle, heavy at times. Patches of mist and fog soon. Rain easing later.
Visibility: Mostly good, reducing moderate to poor in all precipitation, mist and fog.
Forecast for Irish coastal waters from Roche's Point to Loop Head to Rossan Point
Wind: Southwest force 5 or 6, easing force 4 or 5 imminent between Roches Point and Loop Head. Soon veering westerly force 3 or 4, reaching force 5 at times between Erris Head and Rossan Point. Later easing westerly force 2 to 4.
Weather: Rain and drizzle, heavy at times with patches of mist and fog. Rain easing later.
Visibility: Mostly good, reducing moderate to poor in all precipitation, mist and fog.
Forecast for Irish coastal waters from Rossan Point to Malin Head to Belfast Lough
Wind: Southeast force 3 or 4, veering southwesterly force 5 or 6 imminent. Soon becoming southwesterly force 4 or 5, reaching force 6 at times between Rossan Point and Malin Head. Later becoming southwesterly force 3 to 4, reaching force 5 between Rossan Point and Fair Head.
Weather: Rain and drizzle, heavy at times. Patches of mist and fog possible.
Visibility: Mostly good, reducing moderate to poor in all precipitation, mist and fog.
Outlook for a further 24 hours until 18:00, Saturday 20 September 2025
Light to moderate southwesterly or variable winds, becoming mostly northeasterly and strengthening fresh to strong Friday night. Moderate to fresh northeasterly winds, will be reaching strong at times Saturday morning. Further strengthening to near gale and gale force strength at times on Saturday evening on north, east and south coasts. Weather: Rain on east and south coasts, becoming heavy Friday night and into Saturday morning, and gradually easing by Saturday evening.
Forecast issued at: 18:00, Thursday 18 September 2025
All times are local unless specified
