Sea Area Forecast
Forecast valid from: 12:00, Sunday 21 December 2025 until 12:00, Monday 22 December 2025
Small Craft Warning
1. Easterly winds will reach force 6 at times tonight (Sunday night) and tomorrow morning on Irish coasts from Fair Head to Strangford Lough to Howth Head. 2. Easterly winds will reach force 6 Monday evening on Irish coasts from Carnsore Point to Hook Head to Dungarvan.
Gale Warning
Nil
Atlantic Swell
On Atlantic coasts today and tonight.
Meteorological Situation at 09:00 UTC
Ireland lies in a mostly moderate southeasterly airflow, fresh in the northeast, with an elongated complex area of low pressure of 1000hPa centred to the west and south of Ireland. An associated frontal trough lies over northeastern areas, while another frontal trough approaches from the south.
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Bloody Foreland to Carlingford Lough to Carnsore Point and for the Irish Sea
Wind: Decreasing easterly force 4 or 5 imminent. Soon increasing force 6 at times in the east. Later increasing east to southeast force 4 to 6.
Weather: Cloudy to fair with rain and drizzle, mainly in the northeast. Soon cloudy with rain and drizzle. Mist patches likely.
Visibility: Moderate or poor in precipitation and mist.
Forecast for Irish coastal waters from Carnsore Point to Roches Point to Valentia
Wind: Increasing east to northeasterly force 4 or 5 imminent. Soon increasing northeasterly force 4 or 5, occasionally force 6. Becoming southeasterly east of Roches Point towards the end of the period.
Weather: Cloudy to fair with rain and drizzle or showers at times. Mist patches possible.
Visibility: Moderate or poor in precipitation and mist.
Forecast for Irish coastal waters from Valentia to Loop Head to Bloody Foreland
Wind: Increasing easterly mainly force 4 imminent. Soon east to northeast force 4 or 5. Later north to northeast or variable force 3 or 4, occasionally force 5 south of Loop Head.
Weather: Cloudy to fair with isolated showers and with rain and drizzle south of Slyne Head imminent. Scattered outbreaks of rain and drizzle soon and later. Occasional mist patches.
Visibility: Moderate or poor in precipitation and mist.
Outlook for a further 24 hours until 12:00, Tuesday 23 December 2025
Mostly light to moderate northerly or variable winds in the west, becoming easterly or variable Monday night. Mostly moderate to fresh east to southeasterly winds elsewhere, strong at times in the south, but easing light to moderate elsewhere and becoming east to northeasterly towards the end of the period. Weather: Cloudy to fair with rain and drizzle at times. Mist and isolated fog patches.
Forecast issued at: 12:00, Sunday 21 December 2025
All times are local unless specified
