National Forecast
Issued at: 11 September 2026 19:30
TONIGHT
It will become wet and rather windy across the north and west tonight. The rain will be heavy and thunderstorms are also possible, which may cause localised flooding. It will be drier in the south and east with patchy light rain or drizzle. Lowest temperatures of 11 to 15 degrees with fresh to strong and gusty south to southwest winds and gales on the west and northwest coast for a time.
TOMORROW - Saturday 12th September
The rain will move southwards tomorrow morning and will linger over southern areas for much of the day, while a clearance to scattered showers develops further to the north. The rain in the south and southwest will be heavy at times, particularly in the morning and again in the evening, and may cause localised flooding. Breezy and blustery during the morning and early afternoon with moderate to fresh and gusty south to southwest winds, but winds will ease through the rest of the day. Highest temperatures of 16 to 21 degrees.
National Outlook
Overview: Mixed conditions for the remainder of the weekend and into next week. Dry and bright periods will be interspersed with wet or showery ones. Breezy at times too. Turning cooler from Tuesday onwards.
Saturday night: Any lingering rain in the south should clear early in the night, leaving a mostly dry night with a mix of cloud and clear spells and just the odd light shower about. Some mist and fog patches will develop as winds ease light and variable overnight. Lowest temperatures of 9 to 13 degrees.
Sunday: Staying dry for many with just a few light showers about. While it will be quite cloudy, some sunny spells will break through at times. Highest temperatures of 16 to 21 degrees, coolest in Ulster, with a light to moderate south to southwest breeze.
Sunday night: Starting off mostly dry with a mix of cloud and clear spells and just a few showers about. Outbreaks of rain will arrive into Atlantic coastal areas towards morning. A mild night with lowest temperatures of 12 to 14 degrees, with a light to moderate south to southwest breeze.
Monday: Current indications are for a wet and breezy start to the day with widespread rain, turning heavy and persistent at times. The rain will clear eastwards through the afternoon, with sunny spells and scattered showers following. Highest temperatures of 17 to 21 degrees, with moderate to fresh southwesterly winds, veering westerly with the clearance of the rain.
Tuesday: Fresh and breezy with sunny spells and scattered showers. The showers will mainly affect the west and north of the country. Cooler than previous days with highest temperatures of 14 to 18 degrees, with a moderate to fresh northwesterly breeze.
Further outlook: Staying mixed for the remainder of the working week with showers or spells of rain forecast for each day, but also some drier and brighter spells. Turning breezy at times too, with maximum temperatures in the mid-teens generally.
Temperature circle (°C): maximum and minimum temperature forecast for each day. Wind symbol (km/h): arrow points in the direction the wind is blowing. The weather and wind icons: for the time of maximum temperature and minimum temperature.