National Forecast
Issued at: 17 March 2026 21:30
TONIGHT
Tonight will be mostly cloudy in Munster, Leinster and east Ulster with patchy light rain, drizzle, mist and fog. Clear intervals for a time in Connacht and west Ulster, but becoming mostly cloudy by morning. Lowest temperatures of 1 to 5 degrees in the northwestern half of the country, 5 to 9 degrees elsewhere, with mostly light southerly or variable breezes.
TOMORROW - Wednesday 18th March
Wednesday morning will be mostly cloudy with patchy rain, drizzle and mist. It will become drier and brighter in Leinster and Munster in the afternoon, but will continue dull in Connacht and Ulster with some further patchy light rain or drizzle. Highest temperatures of 10 to 15 degrees, mildest for Leinster and Munster, with light, occasionally moderate easterly or variable winds.
National Outlook
Outlook: Becoming settled from Thursday with mostly dry and fairly calm weather. Mild in any sunshine too.
Wednesday night: Generally dry and clear at first with the odd spot of drizzle. Widespread mist and fog patches will develop towards morning. Lowest temperatures of 3 to 7 degrees, in light or variable northeasterly breezes.
Thursday: A pleasant day with widespread spring sunshine. Mild with highest temperatures of 12 to 18 degrees in no more than moderate easterly winds, feeling cool though along exposed coasts. Cold after dark with lows of 1 to 4 degrees.
Thursday night: Dry and clear at first with widespread mist and fog developing towards morning. Overnight lows of 0 to 4 degrees in light or variable easterly.
Friday: A dull but dry start with mist and fog patches. Spells of hazy sunshine will develop early on in just light easterly breezes. Highest temperatures of 12 to 17 degrees, warmest further west.
Saturday: A similar start with widespread mist and fog lingering for a time through the morning at first. Bright and sunny spells will develop early on and stay for the day with cloud increasing again from the northwest come the evening. Feeling slightly cooler with highest temperatures of 10 to 14 degrees in light to moderate northerly breezes.
Sunday: Cloudy on Sunday but remaining dry during daylight hours. Outbreaks of rain and drizzle will start to feed in over parts of the northwest come the evening in light to moderate westerly winds.
Further outlook: From Monday onwards, high pressure will move eastwards with conditions becoming more unsettled. Low pressure systems will feed in from the Atlantic bringing outbreaks of rain and drizzle across the country. However, towards the end of next week there is a slight signal for more settled weather with high pressure returning.
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.