Sea Area Forecast
Forecast valid from: 06:00, Monday 08 December 2025 until 06:00, Tuesday 09 December 2025
Small Craft Warning
1. Southwest winds will reach force 6 on all Irish coasts this morning, afternoon and evening (Monday) 2. East to southeast winds will reach force 6 on all Irish coasts tonight (Monday night).
Gale Warning
Southerly winds will reach gale force 8 from early Tuesday on Irish coastal waters from Howth Head to Roches Point to Loop Head and on the south Irish Sea.
Atlantic Swell
On southwestern, western and northwestern coasts.
Meteorological Situation at 03:00 UTC
A broad and complex area of low pressure over the mid-Atlantic with multiple centres, including one of 973hPa located approximately 300 nautical miles northwest of Erris Head, generates a fresh to strong or near gale force south to southwest airflow over the country. An occlusion clears the northeast of the country.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Slyne Head to Malin Head to Howth Head and for the north Irish Sea
Wind: Imminent decreasing southwesterly force 5 or 6. Soon backing southerly and decreasing force 4 or 5. Later backing east to southeast and increasing force 5 to 7 by the end of the period.
Weather: Fair with scattered showers. Persistent and widespread rain, heavy at times, later.
Visibility: Decreasing moderate or poor in precipitation, otherwise good.
Forecast for Irish coastal waters from Howth Head to Mizen Head to Slyne Head and for the south Irish Sea
Wind: Southwesterly force 5 or 6, reaching near gale force 7 at times. Soon backing southerly and decreasing force 4 to 6. Increasing near gale force 7 or gale force 8 by the end of the period.
Weather: Fair with scattered showers. Persistent and widespread rain, heavy at times, later.
Visibility: Decreasing moderate or poor in precipitation, otherwise good.
Outlook for a further 24 hours until 06:00, Wednesday 10 December 2025
Southeasterly winds, veering southwesterly, will strengthen to gale force or higher on all Irish coastal waters through Tuesday, before mostly weakening to strong or near gale force later on Tuesday and into Wednesday morning. Weather: Widespread and persistent rain, heavy at times, clearing northwards and followed by scattered showers.
Forecast issued at: 06:00, Monday 08 December 2025
All times are local unless specified
