Sea Area Forecast
Forecast valid from: 11:00, Saturday 21 March 2026 until 12:00, Sunday 22 March 2026
Small Craft Warning
Southwest winds will reach force 6 at times on Irish coasts from Slyne Head to Rossan Point to Malin Head on Saturday night and early Sunday morning.
Gale Warning
Nil
Atlantic Swell
Developing on northwestern coasts today.
Meteorological Situation at 09:00 UTC
Ireland lies in a mostly light variable airflow, centered between two anticyclones centred over Eastern Europe and in the mid-Atlantic. A weak cold front slow-moving to the north-west of Ireland will move down over the country later tonight and tomorrow.
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Valentia to Slyne Head to Malin Head
Wind: South to southwest or variable force 2 to 4. Increasing south to southwest force 3 to 5 imminent. Soon increasing south-west force 4 to 6, strongest in the northwest. Veering west to northwest force 4 later.
Weather: Cloudy to fair with mist and fog patches. Isolated patches of light rain or drizzle possible. Rain and drizzle for a time soon. Becoming fair in the north-west later.
Visibility: Moderate or poor in precipitation, mist and fog. Otherwise good.
Forecast for Malin Head to Carlingford Lough to Howth Head and for the Irish Sea North of Anglesey
Wind: Variable or southeast force 3 or less. Soon becoming south to south-west force 3 or 4. Veering west to north-west later.
Weather: Cloudy to fair with some mist, fog and drizzle patches. Cloudy later with patchy rain.
Visibility: Moderate or poor in precipitation, mist and fog. Otherwise good.
Forecast for Howth Head to Hook Head to Valentia and for the Irish Sea South of Anglesey
Wind: Variable force 3 or less. Soon becoming west to south-west force 3 or 4. Becoming north-west or variable force 3 or less later.
Weather: Fair, apart from some mist and fog patches. Cloudy with patchy rain and drizzle later.
Visibility: Moderate or poor in precipitation, mist and fog. Otherwise good.
Outlook for a further 24 hours until 12:00, Monday 23 March 2026
Light to moderate west to northwesterly winds increasing fresh at times. Decreasing anticyclonic variable by Sunday night. Moderate to strong southerly winds developing later, strongest in the northwest. Patchy rain clearing south-east followed by fair weather for a time. Cloudy in the west later.
Forecast issued at: 11:00, Saturday 21 March 2026
All times are local unless specified
