Sea Area Forecast
Forecast valid from: 05:30, Thursday 24 September 2026 until 06:00, Friday 25 September 2026
Small Craft Warning
South to southwest winds will reach force 6 or higher on Thursday and Thursday night on Irish coasts from Valentia to Rossan Point to Strangford Lough.
Gale Warning
Nil
Atlantic Swell
Developing on Atlantic coasts on Thursday night.
Meteorological Situation at 03:00 UTC
Ireland lies in a moderate to strong southerly airflow between an anticyclone of 1027hPa centred over Britain and a depression of 960hPa centred southwest of Iceland. The associated cold front will track eastwards across Ireland today.
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Valentia to Rossan Point to Belfast Lough
Wind: Southerly force 5 to 7, soon decreasing west to southwest force 4 to 6.
Weather: Cloudy with rain and drizzle. Later becoming cloudy to fair with isolated showers.
Visibility: Moderate or poor in precipitation, otherwise good.
Forecast for Belfast Lough to Wicklow Head to Valentia and for the Irish Sea
Wind: Southerly force 4 or 5, soon increasing force 4 to 6. Later gradually veering west to northwest force 3 or 4.
Weather: Cloudy to fair with isolated showers. Later cloudy with rain and drizzle.
Visibility: Mostly good, decreasing moderate or poor in precipitation later.
Outlook for a further 24 hours until 06:00, Saturday 26 September 2026
Moderate to strong southwest winds in the west and north, light to moderate northwest winds in the east and south. Winds becoming moderate to strong southwest in all areas on Friday evening. Weather: Cloudy to fair with drizzle in the south and east and showers elsewhere. Becoming fair with scattered showers by Friday evening.
Forecast issued at: 05:30, Thursday 24 September 2026
All times are local unless specified
