Sea Area Forecast
Forecast valid from: 12:00, Thursday 18 December 2025 until 12:00, Friday 19 December 2025
Small Craft Warning
South to southwest winds, veering southwest to west, will reach force 6 at times on all Irish coasts through the period.
Gale Warning
1. Southwest winds will occasionally reach gale force 8 today (Thursday) on Irish coastal waters from Mizen to Slyne Head to Malin Head. 2. Southwest winds will occasionally reach gale force 8 from Malin Head to Howth Head to Carnsore Point, and on the Irish sea on Friday.
Atlantic Swell
Yes
Meteorological Situation at 09:00 UTC
A depression of 959hPa centered to the south of Iceland extends a moderate to strong south to southwest airflow over Ireland. Active troughs are embedded in the flow, and associated weather fronts will move over the country today.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Mizen Head to Erris Head to Fair Head
Wind: West to southwest force 4 to 6, increasing force 5 or 6, and occasionally force 7 imminent. Soon increasing west to southwest force 6 or 7, and occasionally gale force 8. Later becoming westerly force 5 to 7.
Weather: Cloudy with rain, heavy at time with thunderstorms possible. Becoming fair later with scattered showers, some heavy at times.
Visibility: Good, reducing moderate or poor in precipitation.
Forecast for Irish coastal waters from Fair Head to Carnsore Point to Mizen Head and for the Irish Sea
Wind: Southerly force 5 to 7, veering west to southwest imminent. Soon increasing southwest force 6 or 7, and occasionally gale force 8.
Weather: Cloudy with patchy rain and drizzle, with persistent rain soon. Heavy at times. Becoming cloudy to fair later with scattered showers, some heavy at times.
Visibility: Good, reducing moderate or poor in precipitation.
Outlook for a further 24 hours until 12:00, Saturday 20 December 2025
Fresh to strong and gusty west to southwest winds, will back southerly Friday night and occasionally reaching gale force strength. Cloudy to fair with scattered showers, some heavy at times with the chance of hail or thunder possible.
Forecast issued at: 12:00, Thursday 18 December 2025
All times are local unless specified
