National Forecast
Issued at: 16 September 2026 08:30
TODAY - Wednesday 16th September
Apart from a few isolated showers, it'll be dry in many areas for much of the day, with some bright or sunny spells for a time. However, it'll become increasingly cloudy from the west through the afternoon, with rain and drizzle moving into the northwest, west and southwest this evening and becoming breezy there too. Highest temperatures of 13 to 18 degrees, coolest in the northwest. Winds will be mostly light to moderate west to southwesterly for a time, becoming moderate southwesterly in the afternoon, freshening in the west and northwest, and increasing strong in some coastal parts there.
TONIGHT
Outbreaks of rain will continue to spread southeastwards early tonight, with clear spells and scattered showers following on from the west overnight. Lowest temperatures of 9 to 12 degrees in mostly moderate to fresh and occasionally gusty southwesterly winds, veering westerly and generally moderating, but remaining strong along some Atlantic coasts.
TOMORROW - Thursday 17th September
Tomorrow, Thursday, will be a fresh, blustery day with sunny spells and scattered showers, most frequent in the morning and early afternoon. The showers will become isolated in the evening. Highest temperatures of 13 to 17 degrees, in moderate to fresh and gusty westerly winds, strong in some coastal parts.
National Outlook
Thursday night: Starting off clear with very isolated showers. Cloud will increase in the southwest early on and continue to spread across the country overnight. Highest temperatures of 9 to 12 degrees in moderate to fresh west to southwest winds, strong on coasts.
Friday: Rather wet and breezy during the morning with widespread rain, heavy at times across west and southwest counties. The rain will ease and clear to the east through the afternoon with showers developing behind. It will remain cloudy and dull for the day. Highest temperatures of 15 to 19 degrees, in a moderate, occasionally fresh, southwesterly wind.
Friday night: A mix of cloud and clear spells overnight, cloudier to the southwest, with scattered showers spreading from the west. Lowest temperatures of 11 to 15 degrees, warmest in the south in moderate to fresh southwest winds, strong and gusty along coasts.
Saturday: Breezy on Saturday with sunny spells and passing showers, mainly across the northern half of the country. Highest temperatures of 14 to 18 degrees, coolest in the north, in moderate to fresh westerly winds, strong on Atlantic coasts.
Sunday: Sunday is looking to be drier but generally cloudy across the country. Patchy outbreaks of rain and drizzle will feed in over west coastal counties towards the evening. Highest temperatures of 15 to 18 degrees, mildest in the southwest. Light to moderate westerly winds, backing southerly later.
Monday: Another cloudy start on Monday with patchy rain and drizzle. Through the early afternoon, conditions are expected to improve with more in the way of bright spells developing. Light to moderate southwest winds.
Further outlook: Current indications suggest that high pressure will move in over Ireland for the coming days bringing more settled weather. While there will be spells of rain and drizzle at times, there will also be occasional sunny breaks. Temperatures will be mild, ranging in the mid to high teens.
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.