National Forecast

Issued at: 19 September 2026 05:30

TODAY - Saturday 19th September

Any lingering rain further south will clear early on, leaving a bright and breezy day with sunny spells. Scattered showers will mainly affect the northern half of the country with plenty of dry weather further south. Highest temperatures of 14 to 19 degrees, coolest in the northwest and warmest in the south and southeast, with moderate to fresh southwest to west winds, stronger in the northwest.

TONIGHT

Dry for most with clear spells, as showers become mainly confined to the northwest and north. Cloud will thicken in the southwest and parts of the south though, with the odd spot of drizzle possible here too. Lowest temperatures of 7 to 12 degrees, with light to moderate southwest to west winds, fresher at times in the west and northwest, easing through the night.

TOMORROW - Sunday 20th September

Plenty of dry and bright weather with sunny spells away from the southwest. However, cloud in the southwest will gradually spread northeastwards to most areas through the day, together with the odd patch of drizzle or mist. Highest temperatures of 14 to 20 degrees, coolest in Ulster, with light variable breezes becoming southerly.

National Outlook

While there will be some rain and drizzle at times in places, there'll be a lot of dry weather for the early days of next week, as high pressure builds. Becoming warm and humid too.

Saturday night: There'll be a few scattered showers in northern parts and rather cloudy in southwestern coastal parts with few spots of drizzle, otherwise it'll be a dry night with clear spells. Lowest temperatures of 8 to 13 degrees with westerly winds generally easing light to moderate, continuing fresh though in parts of the north and northwest.

Sunday: Apart from a few isolated light showers in Ulster and cloudy conditions in the far southwest, with a few spots of drizzle and mist there, it'll be dry for most for much of Sunday with some bright or sunny spells. Cloud will continue to build further from the southwest through the day, with a little patchy light rain and drizzle in other parts of the southwest and west later, mainly in the evening. Highest temperatures of 14 to 19 degrees in mostly light to moderate westerly breezes, a little fresher at first in coastal parts of the north and northwest, backing southerly later.

Sunday night: Mostly cloudy on Sunday night with some rain and drizzle spreading northeastwards, along with some hill and coastal mist and fog. Winds will be mostly moderate southerly and will be dragging up very mild and humid air over the country, with temperatures not falling below 11 to 16 degrees.

Monday: A cloudy start on Monday with a little patchy light rain, drizzle, mist and fog for a time. However, it'll become mostly dry later in the morning, with just the odd patch of drizzle or light shower for the afternoon and evening. While it'll gradually brighten up too through the afternoon, with some sunny spells developing, it'll likely stay mostly cloudy and possibly misty along some windward coasts of the south and west. Very mild or warm and humid with highest temperatures of 18 to 24 degrees in mostly moderate south to southwest winds, warmest away from southern and western coasts.

Monday night: A very mild and humid night with a lot of dry weather and some clear spells, though with a little drizzle, mist and fog. Lowest temperatures of 13 to 16 degrees in light to moderate southerly winds.

Tuesday will bring a good lot of dry weather with some bright or sunny spells, the best of these across the south and east. It'll probably be cloudier in the west and north, with the likelihood that a weather front will bring some rain and drizzle there. Very mild or warm with highest temperatures of 17 to 22 degrees in mostly moderate south to southwesterly winds, warmest across the midlands, south and east.

Wednesday: There's more uncertainty by Wednesday, with the chance that the weather front will track eastwards across the country, bringing outbreaks of rain. However, there's also the chance that high pressure may hold on for a little longer.