Sea Area Forecast
Forecast valid from: 00:00, Sunday 21 December 2025 until 00:00, Monday 22 December 2025
Small Craft Warning
Southeasterly winds will reach force 6 or higher tonight (Saturday) and tomorrow morning (Sunday) on Irish coasts from Rossan Point to Belfast Lough to Carnsore Point.
Gale Warning
Nil
Atlantic Swell
On Atlantic coasts.
Meteorological Situation at 21:00 UTC
A broad, complex area of low pressure lies to the northwest with a secondary depression of 990hPa, centred approximately 65 nautical miles west of Erris Head, generates a mostly fresh to near gale force southeasterly airflow over Ireland, but light variable in the southwest. Associated frontal troughs are tracking northeastwards over the country.
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Irish coastal waters from Erris Head to Fair Head to Carnsore Point and for the Irish Sea
Wind: Southeasterly force 5 to 7. Soon decreasing east or southeast force 4 to 6. Later becoming easterly force 4 or 5, occasionally force 6.
Weather: Rain or showers at times. Mist patches possible.
Visibility: Moderate or poor in precipitation and mist.
Forecast for Irish coastal waters from Carnsore Point to Roches Point to Valentia
Wind: Southeasterly or variable force 2 to 4 imminent. Soon increasing easterly force 3 or 4, occasionally force 5. Later increasing northeasterly force 4 or 5, occasionally force 6.
Weather: Rain or showers at times. Mist patches possible.
Visibility: Moderate or poor in precipitation and mist.
Forecast for Irish coastal waters from Valentia to Slyne Head to Erris Head
Wind: Southerly or variable force 2 to 4 imminent. Later increasing northeasterly force 3 or 4.
Weather: Showers. Mist and coastal fog patches.
Visibility: Moderate or poor in precipitation and mist, otherwise good.
Outlook for a further 24 hours until 00:00, Tuesday 23 December 2025
Mostly light to moderate northeasterly or variable winds in the west, gradually becoming northerly or variable. Mostly moderate to fresh easterly winds elsewhere, reaching strong at times, becoming southeasterly later before becoming cyclonic variable in the south later Monday. Weather: Rain and drizzle, mainly in the north and east, clearing to showers through Monday. Mist and fog patches.
Forecast issued at: 00:00, Sunday 21 December 2025
All times are local unless specified
