Sea Area Forecast
Forecast valid from: 06:00, Sunday 21 December 2025 until 06:00, Monday 22 December 2025
Small Craft Warning
1. Southeasterly winds will reach force 6 or higher this morning (Sunday) on Irish coasts from Bloody Foreland to Fair Head to Carlingford Lough. 2. Easterly winds will reach force 6 at times tonight (Sunday night) on Irish coasts from Fair Head to Belfast Lough to Strangford Lough.
Gale Warning
Nil
Atlantic Swell
On Atlantic coasts.
Meteorological Situation at 03:00 UTC
An elongated depression of 993hPa, centred approximately 170 nautical miles northwest 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 Rossan Point to Belfast Lough to Carnsore Point and for the Irish Sea
Wind: Decreasing east or southeast force 4 to 6 imminent. Soon becoming easterly force 4 or 5, occasionally force 6. Later becoming mainly force 4 to 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: Easterly or variable force 3 or 4 imminent, occasionally force 5. Soon increasing northeasterly force 4 or 5. Later increasing force 6 at times.
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 Rossan Point
Wind: Southerly or variable force 2 to 4. Soon increasing easterly force 3 or 4. Later backing northerly.
Weather: Showers. Mist and fog patches possible.
Visibility: Moderate or poor in showers, mist and fog, otherwise good.
Outlook for a further 24 hours until 06:00, Tuesday 23 December 2025
Mostly light to moderate northerly or variable winds in the west, increasing fresh at times Monday night. Mostly moderate to fresh easterly winds elsewhere, reaching strong at times, veering southeasterly through Monday and becoming cyclonic variable in the south . Weather: Rain and drizzle, mainly in the north and east, clearing to showers through Monday. Mist and fog patches.
Forecast issued at: 06:00, Sunday 21 December 2025
All times are local unless specified
