Sea Area Forecast
Forecast valid from: 05:25, Wednesday 19 August 2026 until 06:00, Thursday 20 August 2026
Small Craft Warning
1. Southwest to west winds, veering west to northwest, will reach force 6 at times today (Wednesday) on Irish coasts from Carnsore Point to Valentia to Bloody Foreland. 2. Northwest to north winds will reach force 6 at times tonight (Wednesday night) on Irish coasts from Carnsore Point to Slyne Head to Belfast Lough.
Gale Warning
Nil
Meteorological Situation at 03:00 UTC
A depression of 997hPa, centred approximately 210 nautical miles northwest of Malin Head, generates a fresh to strong and unstable westerly airflow over Ireland. Showery troughs are embedded in the flow.
Small Craft Warning: In effect
Heavy Swell (>4m) : No
Forecast for Roches Point to Slyne Head to Bloody Foreland
Wind: Southwest to west force 4 to 6. Soon veering west to northwest. Later veering northwest to north force 5 or 6.
Weather: Cloudy or fair with scattered showers, heavy at times.
Visibility: Mostly good. Decreasing moderate or poor in showers.
Forecast for Bloody Foreland to Belfast Lough to Howth Head and for the North Irish Sea
Wind: Southwest to west force 4 to 6. Imminently decreasing force 3 to 5. Soon becoming cyclonic variable. Later increasing northwest to north force 4 to 6.
Weather: Cloudy or fair with scattered showers, heavy at times with a chance of isolated thunderstorms.
Visibility: Mostly good. Decreasing moderate or poor in showers.
Forecast for Howth Head to Carnsore Point to Roches Point and for the South Irish Sea
Wind: Southwest to west force 4 or 5. Soon increasing force 4 to 6. Later veering northwest force 5 or 6.
Weather: Cloudy or fair with scattered showers, heavy at times with a chance of isolated thunderstorms.
Visibility: Mostly good. Decreasing moderate or poor in showers.
Outlook for a further 24 hours until 06:00, Friday 21 August 2026
Moderate to strong and gusty northwest to north winds. Cloudy or fair with scattered showers, heavy at times with a chance of isolated thunderstorms.
Forecast issued at: 05:25, Wednesday 19 August 2026
All times are local unless specified
