Sea Area Forecast
Forecast valid from: 12:00, Thursday 21 May 2026 until 12:00, Friday 22 May 2026
Small Craft Warning
Southerly winds will reach force 6 at times today on Irish coasts from Belfast Lough to Roche's Point to Rossan Point.
South to south-east winds will occasionally reach force 6 tonight on coasts from Fair Head to Belfast Lough to Howth Head.
Southerly winds will also occasionally reach force 6 tonight and tomorrow morning on coasts from Loop Head to Erris Head to Rossan Point
Gale Warning
nil
Meteorological Situation at 09:00 UTC
A large and complex depression in the nearby Atlantic steers up its associated fronts with warm sector conditions in a moderate to strong southwest flow.
Small Craft Warning: In effect
Heavy Swell (>4m) : No
Forecast for Belfast Lough to Carnsore Point to Erris Head and for the Irish Sea
Wind: South to southeast force 5 or 6. Becoming force 4 to 6 imminent, and later veering south to southwest.
Weather: Cloudy with occasional rain and drizzle. Mist and fog at times also. Fair spells developing too. Some fog banks.
Visibility: Moderate or poor in any precipitation, mist or fog.
Forecast for Erris Head to Malin Head to Belfast Lough
Wind: South to southeasterly mainly force 4 or 5, occasionally force 6. Later force 3 to 5.
Weather: Cloudy with occasional rain and drizzle. Mist and fog at times also. Some fair spells later.
Visibility: Moderate or poor in any precipitation, mist or fog.
Outlook for a further 24 hours until 12:00, Saturday 23 May 2026
Ireland will lie between low pressure to the west and high pressure to the east. Embedded weather fronts will feed up on a moderate to fresh southwest airflow, after which high pressure will move in. Cloudy with patchy outbreaks of rain and drizzle. Cloudy to fair later. Possible fog banks for southern and eastern areas. South to southwest winds will be mostly moderate to fresh, occasionally strong at times in the west.
Forecast issued at: 12:00, Thursday 21 May 2026
All times are local unless specified
