Sea Area Forecast
Forecast valid from: 18:00, Tuesday 17 March 2026 until 18:00, Wednesday 18 March 2026
Small Craft Warning
1. Southerly winds will reach force 6 or 7 at times this evening (Tuesday) and early tonight on Irish coasts from Slyne Head to Fair Head to Carnsore Pt
2. Northeasterly winds will increase to force 6 on Wednesday afternoon on coasts from Dungarvan to Mizen Head to Loop Head
Gale Warning
Nil
Atlantic Swell
On Atlantic coasts, this evening, tonight and on Wednesday.
Meteorological Situation at 15:00 UTC
A depression of 969 hPa south of Iceland moves eastwards and maintains a mostly strong south to southwest airflow over Ireland. A cold front moves slowly eastwards over Ireland
Small Craft Warning: In effect
Heavy Swell (>4m) : yes
Forecast for Slyne Head to Rossan Point to Fair Head
Wind: Southerly force 6 or 7, decreasing force 5 or 6 imminent, soon decreasing force 3 or 4, later decreasing force 2 or 3, becoming northerly or variable force 2 to 4 by the end of the period.
Weather: Rain in the north at first this evening, becoming mainly fair tonight. Rain, drizzle and mist returning overnight and on Wednesday.
Visibility: Moderate or poor in rain, drizzle and mist, otherwise good.
Forecast for Fair Head to Howth Head to Carnsore Point and for the Irish Sea
Wind: Southerly force 6 or 7, decreasing force 4 or 5 imminent, soon decreasing force 2 or 3, force 3 or less, then increasing north to northeast force 2 to 4.
Weather: Rain, drizzle and mist developing this evening and continuing tonight and much of Wednesday
Visibility: Moderate or poor in rain, drizzle and mist, otherwise good.
Forecast for Carnsore Point to Mizen Head to Slyne Head
Wind: South to southwest force 4 or 5, decreasing force 2 to 4 imminent, soon becoming east to northeast, later becoming northeasterly and gradually increasing force 5 to 7.
Weather: Rain, drizzle and mist spreading eastwards this evening. Further rain, drizzle and mist tonight at times on Wednesday.
Visibility: Moderate or poor in rain, drizzle and mist, otherwise good.
Outlook for a further 24 hours until 18:00, Thursday 19 March 2026
Fresh to strong northeasterly winds on Munster coasts, moderate to fresh north to northeast winds elsewhere, decreasing moderate to fresh east to northeast on all coasts on Thursday. Patchy rain and drizzle dying out early on Wednesday night. Becoming fair apart from localised mist or fog patches.
Forecast issued at: 18:00, Tuesday 17 March 2026
All times are local unless specified
