National Forecast
Issued at: 20 January 2026 12:00
TODAY - Tuesday 20th January
Rain and blustery conditions will become increasingly confined to Ulster this afternoon eventually clearing northeastwards through the evening. Sunny spells and isolated showers will follow the clearance before further outbreaks of rain push into the southwest later. Fresh to strong and gusty southeasterly winds will decrease moderate to fresh behind the rain. Highest temperatures of 6 to 9 degrees. A combination of spring tides and onshore winds may result in coastal flooding particularly at high tide along the south and east coasts.
TONIGHT
Generally cloudy at first tonight with outbreaks of rain spreading from the southwest. The rain will become lighter and patchier as the night goes on with clear spells developing. More persistent rain will develop in the southwest towards morning. Lowest temperatures of 2 to 6 degrees in moderate to fresh south to southeast winds.
TOMORROW - Wednesday 21st January
Tomorrow morning, rain in the southwest will spread across Munster, south Leinster and south Connacht but it will be a dry start further north with sunny spells. Outbreaks of rain will extend nationwide through the afternoon. Turning breezy with the rain with moderate to fresh east to southeast winds, occasionally increasing strong. Highest temperatures of 6 to 10 degrees.
National Outlook
Overview: Unsettled for the rest of the week with frequent spells of rain.
Wednesday night: A cloudy and damp night with widespread outbreaks of rain, some isolated heavy downpours possible. Lowest temperatures of 2 to 7 degrees. Coldest in the west and southwest in light to moderate southeasterly or variable winds.
Thursday: Another generally cloudy day with scattered outbreaks of rain. Some sunny spells are possible in the southwest. Highest temperatures of 6 to 9 degrees in light to moderate southeast or variable winds, fresher in the northeast.
Thursday night: Most areas will remain cloudy with continued rain and drizzle. However, some dry and clear spells are possible in the south and midlands. Lowest temperatures generally of 2 to 6 degrees, but falling to between -1 and +1 degrees under any clear spells, in moderate to fresh easterly winds.
Friday: Dull, damp and quite breezy with further rain and drizzle spreading from the south. Highest temperatures of 6 to 9 degrees in moderate to fresh easterly winds.
Saturday: Current indications suggest that Saturday will be blustery with scattered patches of rain. More persistent rain is possible in the south. Highest temperatures of 5 to 8 degrees in fresh to strong easterly winds.
Further outlook: While the details are uncertain, low pressure will remain in charge of our weather with further spells of rain likely. Potentially turning cooler early next week.
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.