National Forecast
Issued at: 22 September 2026 20:45
TONIGHT
Tonight will be cloudy at first with rain and drizzle spreading from the northwest. The rain will be heavy in places with a slight chance of spot flooding. The rain will slowly clear eastwards with clear spells and isolated showers following behind. Some mist and fog patches developing too. Lowest temperatures of 8 to 13 degrees, coolest in the northwest and mildest in the southeast. Light southerly winds will veer northwesterly behind the rain.
TOMORROW - Wednesday 23rd September
Tomorrow morning, lingering rain and cloud in the east will clear early on, leaving a mostly dry and bright day with sunny spells and just the odd shower, most likely in the west or north. Highest temperatures of 14 to 19 degrees in a light northwesterly or variable breeze.
National Outlook
Overview: Mixed for the rest of the week, with rain or showers at times. Daytime temperatures in the mid to high teens.
Wednesday night: Dry with clear spells at first, but cloud will increase overnight and patches of light rain or drizzle will develop in the west and northwest. Lowest temperatures of 7 to 11 degrees with a moderate southerly breeze developing.
Thursday: Thursday will be a breezy day with a fresh and gusty southerly wind. Most areas will be dry at first with occasional sunshine, but there'll be patchy rain and drizzle in the west and northwest and also some drizzle towards the south coast. The rain will slowly move eastwards across parts of Ulster, Connacht and Munster during the afternoon and evening. Highest temperatures of 15 to 19 degrees.
Thursday night: Winds will ease on Thursday night and it'll be mostly cloudy with patchy light rain or drizzle. Mild and humid with lowest temperatures of 11 to 14 degrees.
Friday: Friday morning will be cloudy with patchy light rain or drizzle. This will gradually clear eastwards through the afternoon and evening, giving way to sunshine and showers, mainly in the west and north. Highest temperatures of 13 to 16 degrees with light to moderate southwesterly winds.
Friday night: A few showers in the north and west on Friday night, otherwise dry with long clear spells. Lowest temperatures of 7 to 11 degrees with light to moderate southerly winds.
The Weekend: A bright and breezy start to Saturday with sunny spells and scattered blustery showers. Rain is expected to move into the west later on Saturday, moving eastwards across the country on Saturday night, followed by sunny spells and scattered showers on Sunday. Daytime temperatures over the weekend will reach the mid to high teens.
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.