National Forecast
Issued at: 15 September 2025 14:15
TODAY - Monday 15th September
Windy today with widespread showers or longer spells of rain, some heavy with the chance of thunder, particularly in the north and northwest where spot flooding is possible. The showers and rain will gradually ease from the southwest through the afternoon with brighter conditions developing, along with just isolated showers. However, spells of rain will continue over Ulster. Highest temperatures of 13 to 16 degrees in fresh to strong and gusty westerly winds, along with coastal gales in the west for a time, beginning to ease later.
TONIGHT
Becoming largely dry tonight with clear spells developing, and just isolated showers mainly in the west. In Ulster, more frequent and widespread showers will continue, beginning to ease by the morning. Lowest temperatures of 8 to 12 degrees in moderate to fresh westerly winds, easing mostly light overnight.
TOMORROW - Tuesday 16th September
A dry and bright start for most tomorrow with just isolated showers. Cloud will build from the southwest through the morning with outbreaks of rain spreading northeastwards through the afternoon and evening, turning heavy at times particularly in the southwest. Highest temperatures of 14 to 17 degrees in light to moderate southerly winds, beginning to strengthen in the evening.
National Outlook
Overview: Remaining unsettled with spells of rain and showers, becoming windy at times too.
Tuesday night: Widespread outbreaks of rain, turning heavy at times particularly in the south. The rain will gradually clear northeastwards with isolated showers following from the west. Lowest temperatures of 10 to 13 degrees, with moderate to fresh southeasterly winds veering southwesterly.
Wednesday: Dry and blustery for most, with isolated showers and sunny spells. Some more frequent showers may clip the south coast for a time in the morning. Highest temperatures of 16 to 19 degrees with fresh to strong southwest winds, reaching gale force along west and northwest coasts.
Wednesday night: Largely dry with clear spells. Cloud will build in the south overnight with outbreaks of rain moving in. Staying mostly dry with clear spells and isolated showers in the northern half of the country. Lowest temperatures of 9 to 12 degrees in light to moderate southerly winds.
Thursday: Outbreaks of rain in the south are likely to persist for much of the day with drier and brighter conditions in the north. Highest temperatures of 15 to 17 degrees with light southwesterly or variable winds.
Friday: Current indications show a bright day for most with spells of showery rain at times. Highest temperatures of 15 to 17 degrees with mostly light westerly winds.
Further outlook: Unsettled weather is likely to continue into next weekend with further showers and outbreaks of rain.
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.