Sea Area Forecast
Forecast valid from: 23:00, Wednesday 12 August 2026 until 00:00, Friday 14 August 2026
Small Craft Warning
Nil.
Gale Warning
Nil.
Meteorological Situation at 21:00 UTC
Ireland lies in a light to moderate southerly airflow, with an anticyclone of 1030hPa centred over Poland and a depression of 1000hPa centred over Iceland. Associated frontal troughs lie close to the west coast of Ireland.
Heavy Swell (>4m) : No
Forecast for Mizen Head to Slyne Head to Malin Head
Wind: Mainly southerly force 3 or 4, force 2 to 4 in the northwest. Soon increasing force 4 or 5. Later veering westerly.
Weather: Mostly cloudy with isolated rain and drizzle. Soon showery outbreaks of rain, some heavy, with the chance of isolated thunderstorms. Occasional mist and fog. Becoming cloudy to fair towards the end of the period, with isolated showers.
Visibility: Moderate to poor in precipitation, mist and fog, otherwise good.
Forecast for Malin Head to Belfast Lough to Howth Head and for the North Irish Sea
Wind: Variable or southerly force 2 to 4. Later variable force 3 or 4, occasionally force 5.
Weather: Cloudy to fair with isolated showers. Scattered showers later, especially further north, with the chance of isolated thunderstorms. Isolated mist and fog.
Visibility: Mostly good. Decreasing moderate to poor in precipitation, mist and fog.
Forecast for Howth Head to Hook Head to Mizen Head and for the South Irish Sea
Wind: South to southwest or variable force 2 to 4. Soon increasing southwesterly force 3 or 4. Later increasing force 4 or 5 and veering westerly west of Roches Point.
Weather: Cloudy to fair. Occasional mist and fog. Isolated showers.
Visibility: Decreasing moderate to poor in mist, fog and any precipitation. Otherwise good.
Outlook for a further 24 hours until 00:00, Saturday 15 August 2026
Wind: Becoming mostly moderate, occasionally fresh west to northwesterly through Thursday night. DecreasIng light to moderate northerly or variable in the east on Friday. Weather: Cloud, rain, mist and fog clearing eastwards on Thursday night, with cloudy to fair weather and well scattered light showers to follow.
Forecast issued at: 23:00, Wednesday 12 August 2026
All times are local unless specified
