Sea Area Forecast
Forecast valid from: 06:00, Thursday 18 September 2025 until 06:00, Friday 19 September 2025
Small Craft Warning
South to southwest winds will increase force 6 at times today (Thursday) and tonight on Irish coasts from Belfast Lough to Mizen Head to Fair Head, becoming confined to Irish coasts from Howth Head to Carnsore Point to Roches Point by the end of the period.
Gale Warning
Nil
Meteorological Situation at 03:00 UTC
A depression of 992hPA is centred approximately 280 nautical miles northwest of Malin Head, extends a mostly fresh to near gale southwesterly airflow over Ireland. A frontal trough in the south will move northwards across Ireland today.
Small Craft Warning: In effect
Heavy Swell (>4m) : Nil
Forecast for Irish coastal waters from Rossan Point to Malin Head to Belfast Lough
Wind: Decreasing south to southwest force 4 or 5, imminent. Soon backing southeasterly. Later veering southwesterly force 4 to 6.
Weather: Cloudy to fair. Soon becoming cloudy with widespread outbreaks of rain and drizzle. Mist and fog patches too. Later becoming cloudy to fair with occasional outbreaks of rain and drizzle.
Visibility: Decreasing moderate or poor in precipitation or mist and fog. Otherwise good.
Forecast for Irish coastal waters from Belfast Lough to Carnsore Point to Mizen Head and for the Irish Sea
Wind: Increasing south to southwest force 4 to 6, imminent. Soon increasing force 5 to 7. Later decreasing force 4 to 6, but still reaching force 7 between Howth Head and Carnsore Point and in the Irish Sea.
Weather: Cloudy with outbreaks of rain and drizzle, imminent. Mist and fog patches too.
Visibility: Decreasing moderate or poor in precipitation or mist and fog. Otherwise good.
Forecast for Irish coastal waters from Mizen Head to Loop Head to Rossan Point
Wind: Increasing southerly mainly force 5 or 6, but southeasterly force 4 or 5 between Slyne Head and Rossan Point, imminent. Soon veering southwesterly force 5 to 7. Later veering westerly and decreasing force 4 or 5.
Weather: Becoming cloudy with outbreaks of rain and drizzle, imminent. Mist and fog patches too. Later becoming cloudy to fair, except for in the southwest.
Visibility: Decreasing moderate or poor in precipitation or mist and fog. Otherwise good.
Outlook for a further 24 hours until 06:00, Saturday 20 September 2025
Mostly moderate to strong southwest to west winds. Decreasing mostly light to moderate variable through Friday before increasing mostly moderate to strong northeasterly on Friday night. Weather: Cloudy to fair with rain and drizzle, mainly in the east and south, heavy at times later. Some mist and fog patches too.
Forecast issued at: 06:00, Thursday 18 September 2025
All times are local unless specified
