Sea Area Forecast
Forecast valid from: 12:00, Monday 08 December 2025 until 12:00, 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 gales, later veering westerly, will reach gale force 8 or strong gale force 9 during Tuesday for all Irish coastal waters and the Irish Sea, with storm force winds for some west and northwest areas.
Atlantic Swell
On southwestern, western and northwestern coasts.
Meteorological Situation at 09:00 UTC
A broad and complex area of low pressure over the mid-Atlantic with multiple centres, generates a fresh to strong southerly airflow across Ireland. A low to the south of the low pressure region will intensify and track towards Ireland later tonight and during Tuesday, evolving into Storm Bram.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Erris Head to Malin Head to Howth Head and for the north Irish Sea
Wind: South to southwest force 5 or 6. Soon decreasing southerly force 4 to 6. Later backing east to southeast and increasing force 6 to gale force 8 towards the end of the period.
Weather: Fair with scattered showers, mainly for northwest areas. Widespread thundery rain later tonight and early Tuesday. Showers later, mainly in the west and northwest.
Visibility: Decreasing moderate or poor in precipitation, otherwise good.
Forecast for Irish coastal waters from Howth Head to Mizen Head to Erris Head and for the south Irish Sea
Wind: South to southeast force 4 to 6. Later increasing southerly gale force 8 to gale force 9, possibly reaching storm force 10 for western areas by the end of the period.
Weather: Fair with scattered showers, mainly for northwest areas. Widespread thundery rain later tonight and early Tuesday. Showers later, mainly in the west and northwest.
Visibility: Decreasing moderate or poor in precipitation, otherwise good.
Outlook for a further 24 hours until 12:00, Wednesday 10 December 2025
Gale to possible storm southerly force winds will veer westerly and gradually abate during Tuesday night, as Storm Bram tracks northwards, between Iceland and Scotland. Heavy thundery showers with lightning will affect Atlantic counties.
Forecast issued at: 12:00, Monday 08 December 2025
All times are local unless specified
