Sea Area Forecast
Forecast valid from: 18:00, Saturday 20 December 2025 until 18:00, Sunday 21 December 2025
Small Craft Warning
Mainly southeasterly winds will reach force 6 or higher tonight (Saturday) and tomorrow morning on Irish coasts from Slyne Head to Fair Head to Carnsore Point.
Gale Warning
1. Southeasterly winds will reach gale force 8 at times on Irish coastal waters this evening (Saturday) and early tonight from Carlingford Lough to Howth Head to Carnsore Point. 2. Southeasterly winds will reach gale force 8 at times overnight (early Sunday) on Irish coastal waters from Malin Head to Fair Head to Belfast Lough.
Atlantic Swell
On Atlantic coasts.
Meteorological Situation at 15:00 UTC
A complex area of low pressure in the North Atlantic, with a secondary depression of 988hPa centred approximately 220 nautical miles northwest of Erris Head, generates a strong to gale force southeasterly airflow over Ireland. Associated frontal troughs are tracking northeastwards over the country.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Slyne Head to Fair Head to Carnsore Point and for the Irish Sea
Wind: Southeast force 6 to gale force 8 and gusty. Later decreasing east to southeast force 4 to 6.
Weather: Cloudy with outbreaks of rain. Clearing to showers soon.
Visibility: Moderate or poor in precipitation, otherwise good.
Forecast for Irish coastal waters from Carnsore Point to Mizen Head to Slyne Head
Wind: West to southwest force 3 to 5. Imminent decreasing southwesterly or variable force 3 or less between Hook Head and Valentia. Soon becoming southerly or variable force 2 to 4. Later backing southeasterly or variable.
Weather: Cloudy to fair with outbreaks of rain clearing eastwards to showers imminent. Mist and fog patches also.
Visibility: Moderate or poor in precipitation, mist and fog, otherwise good.
Outlook for a further 24 hours until 18:00, Monday 22 December 2025
Light to moderate, occasionally fresh, easterly or variable winds, veering southerly in the west on Monday. Weather: Cloudy to fair with patchy rain, drizzle, mist and fog, becoming persistent in the east and north on Sunday night.
Forecast issued at: 18:00, Saturday 20 December 2025
All times are local unless specified
