Connacht
Issued at: 15 December 2025 16:00
TODAY - Monday 15th December
There will be clear spells and some scattered showers this evening, in a light to moderate southwesterly breeze. The showers will mainly affect coastal areas in the west of the province.
TONIGHT
It will be cold and mostly dry tonight with long clear spells and just isolated showers in coastal areas. A few mist and fog patches may develop in the light southerly winds. Lowest temperatures of 0 to 4 degrees, with a touch of frost possible inland.
Solar UV Index
Low
TOMORROW - Tuesday 16th December
Tomorrow, Tuesday, will be another bright and mostly dry day, with sunny spells and just isolated showers. Cloud will gradually build from the west towards nightfall. Highest temperatures of 6 to 9 degrees, with light to moderate southwesterly winds strengthening towards nightfall.
National Outlook
Overview: After a mostly dry and bright start to the week, conditions will become unsettled again from Tuesday night, with spells of wet weather forecast for the second half of the week.
Tuesday night: Starting off clear over the eastern half of the country, before cloud spreads across the country from the west, with outbreaks of rain and drizzle following. It will be coldest under clear skies early in the night, with temperatures dropping to 1 to 4 degrees. However, it will become milder through the night. Southerly winds will strengthen through the night, becoming fresh to strong and gusty, with gales possible along coasts.
Wednesday: Outbreaks of rain and drizzle will become patchier as they clear eastwards through the morning and afternoon, with a mix of sunny spells and scattered showers following from the west. Milder than the previous two days with highest afternoon temperatures of 10 to 13 degrees. While winds will ease through the morning, it will remain breezy with moderate to fresh southwesterly winds, stronger on western and northwestern coasts.
Wednesday night: Showers will become less frequent through the night, with dry conditions developing for most. Some clear spells too. Lowest temperatures of 4 to 8 degrees, with moderate to fresh southwesterly winds easing towards morning.
Thursday: While the detail is still uncertain, Thursday will bring some wet and windy weather. Persistent rain, heavy at times, will affect parts in the morning and afternoon. As this clears eastwards, showers will feed in from the Atlantic, some of which will be heavy and with a risk of hail or isolated thunderstorms. Highest afternoon temperatures of 7 to 10 degrees. Moderate to fresh southerly winds will veer southwesterly and increase fresh to strong, with gales possible on some western coasts.
Friday: Current indications are that Friday will be a drier day with sunny spells and scattered showers feeding into Atlantic coastal areas. Highest afternoon temperatures of 7 to 10 degrees, with moderate to fresh southwesterly winds.
Further outlook: While unsettled conditions are set to continue for the weekend, with further spells of rain and showers on the way, there are indications that more settled conditions will develop from 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.