National Forecast
Issued at: 30 December 2025 20:15
TONIGHT
Cold and mainly dry tonight, with a mix of cloud and clear spells, coldest and clearest in the north and northwest. Lowest temperatures of -2 to +1 degrees generally, but down as low -3 or -4 degrees further north, with frost and ice developing on untreated surfaces. Light variable breezes or near calm conditions will allow some fog or freezing fog to develop, mainly across the northern half of the country. Cloudier conditions in southern parts of Munster and some southern and eastern parts of Leinster will keep temperatures slightly higher there and may bring a little drizzle.
TOMORROW - Wednesday 31st December
Variable cloud and sunny spells tomorrow with frost and any fog clearing through the morning. Generally dry for much of the day, apart from the chance of a little drizzle near the south coast and with some showers moving into northern coastal parts later in the day. Highest temperatures of 3 to 7 degrees. Winds will be mostly light and variable, gradually starting to become westerly and increasing moderate in northern parts towards evening.
National Outlook
Overview: High pressure continuing to dominate bringing plenty of dry weather though there will be some light rain or showers at times. Turning colder for the weekend with sharp to severe frosts developing.
New Year's Eve night (Wednesday): Rather cloudy early in the night with some light rain sinking southwards. Clear spells and showers will follow from the north. Lowest temperatures of -2 to +3 degrees with frost and icy stretches developing. Light to moderate westerly winds will increase fresh at times for northern and northwestern coasts.
New Year's Day (Thursday): Cloud and patchy light rain in Munster and south Leinster will slowly clear southwards through the day. Elsewhere, there will be sunshine and well scattered showers, most frequent for northern coastal areas. Highest temperatures of 5 to 8 or 9 degrees in light to moderate northwesterly winds, fresher near northern and northwestern coasts.
Thursday night: Dry for most with clear spells and just a few wintry showers. However, it will turn cloudier over Ulster through the night with more frequent showers developing. Lowest temperatures of -1 to +3 or 4 degrees in mostly light to moderate northwesterly winds.
Friday: A day of sunny spells and showers with some falls of sleet and snow possible. Highest temperatures of 2 to 6 degrees generally in light to moderate northwesterly winds, fresh near exposed coasts.
Friday night: Mostly dry and clear with just some wintry showers in the north and northwest. Lowest temperatures of -2 to +2 degrees in light northwest to moderate northwest winds.
Saturday and Sunday: Very cold and mostly dry though some wintry showers will occur, mainly in the north and northwest. Daytime highs will reach just 1 to 5 degrees in mostly light to moderate northwesterly winds. Sharp frosts and ice will develop during the nights.
Further Outlook: Continuing cold into early next week. While there will still be plenty of dry weather, there will be some wintry showers or falls of rain at times.
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.