Réamhaisnéis limistear na farraige
Forecast valid from: 00:00, Tuesday 19 May 2026 until 00:00, Wednesday 20 May 2026
Small Craft Warning
Southeasterly winds, gradually veering southwesterly, will reach force 6 at times on all Irish coasts through the period.
Gale Warning
nil
Atlantic Swell
Developing on southwestern coasts by the end of the period.
Meteorological Situation at 21:00 UTC
Weather fronts associated with a depression of 987hPa centred in the mid north Atlantic track northeastwards over the country, with a moderate to strong southeasterly airflow ahead of the fronts, and a moderate to strong southwesterly airflow following them.
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Loop Head to Erris Head to Malin Head
Wind: Imminent decreasing southerly force 4 or 5, occasionally reaching force 6. Soon veering southwesterly. Increasing force 4 to 6 by the end of the period.
Weather: Mostly cloudy with widespread showers or more persistent spells of rain. Some of the showers will be heavy with the chance of isolated thunderstorms. Mist and fog patches too.
Visibility: Reducing moderate or poor in precipitation, mist and fog.
Forecast for Malin Head to Belfast Lough to Howth Head and for the North Irish Sea
Wind: Imminent decreasing south to southeast force 4 to 6. Later veering southwesterly and decreasing mostly force 3 to 5, but remaining force 5 or 6 in the north Irish Sea.
Weather: Mostly cloudy with widespread showers or more persistent spells of rain. Some of the showers will be heavy with the chance of isolated thunderstorms. Mist and fog patches too.
Visibility: Reducing moderate or poor in precipitation, mist and fog.
Forecast for Howth Head to Roches Point to Loop Head and for the South Irish Sea
Wind: Imminent veering southwesterly force 4 to 6. Soon increasing force 5 or 6, occasionally reaching force 7.
Weather: Mostly cloudy with widespread showers or more persistent spells of rain. Some of the showers will be heavy with the chance of isolated thunderstorms. Mist and fog patches too.
Visibility: Reducing moderate or poor in precipitation, mist and fog.
Outlook for a further 24 hours until 00:00, Thursday 21 May 2026
Moderate to strong southwesterly winds will gradually ease moderate to fresh through Wednesday morning and afternoon, before backing southerly and increasing fresh to strong on western, southern, and eastern coasts by the end of the period. Weather: Cloudy to fair with isolated showers. Cloud increasing from the southwest with rain and drizzle following later in the period.
Forecast issued at: 00:00, Tuesday 19 May 2026
All times are local unless specified
