Sea Area Forecast
Forecast valid from: 18:00, Monday 15 September 2025 until 18:00, Tuesday 16 September 2025
Small Craft Warning
Westerly winds will reach force 6 or higher on all Irish coasts this evening, tonight and tomorrow morning.
Gale Warning
Westerly winds will reach gale force this evening and for a time tonight on the north Irish Sea.
Atlantic Swell
On southwestern coasts this evening.
Meteorological Situation at 15:00 UTC
A depression of 984hPa, centred to the northeast of Scotland, will continue to move eastwards, and the strong to gale force west to northwest airflow over Ireland will gradually ease, as a weak ridge builds over the country tonight.
Gale Warning: In effect
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Carnsore Point to Mizen Head to Erris Head
Wind: West to northwest force 6 or 7, decreasing force 5 or 6 imminent. Later further decreasing force 3 or 4 later and backing southwesterly. Increasing southerly force 4 to 6 by the end of the period.
Weather: Mainly fair with isolated showers. Becoming cloudy later with rain spreading from the southwest.
Visibility: Decreasing moderate or poor in precipitation.
Forecast for Irish coastal waters from Erris Head to Malin Head to Belfast Lough
Wind: Northwesterly force 6 or 7 and gusty. Soon decreasing force 5 or 6. Later backing southwesterly and decreasing force 3 or 4.
Weather: Cloudy to fair with showers or longer spells of rain, heavy at times with a chance of isolated thunderstorms. Becoming fair later with isolated showers.
Visibility: Decreasing moderate or poor in precipitation.
Forecast for Irish coastal waters from Belfast Lough to Howth Head to Carnsore Point and for the Irish Sea
Wind: Westerly force 6 to gale force 8 and gusty. Soon decreasing force 5 to 7. Later further decreasing force 4 or 5.
Weather: Cloudy to fair with showers becoming isolated soon. Rain developing in southern parts by the end of the period.
Visibility: Decreasing moderate or poor in precipitation.
Outlook for a further 24 hours until 18:00, Wednesday 17 September 2025
Southwesterly winds will increase strong to gale force, reaching strong gale force in the northwest Wednesday afternoon. Weather: Cloudy with heavy rain spreading from the southwest followed by isolated showers.
Forecast issued at: 18:00, Monday 15 September 2025
All times are local unless specified
