Ulster
Issued at: 18 September 2026 16:00
TODAY - Friday 18th September
Remaining cloudy and breezy this evening, with rain becoming more patchy. Winds will generally be moderate to fresh and gusty southwesterly, stronger in exposed coastal areas.
TONIGHT
Mainly cloudy tonight, with scattered showers and a few clear spells in between. Lowest temperatures of 11 to 13 degrees, with moderate to fresh and occasionally gusty southwesterly winds, stronger in exposed coastal areas.
Pollen Forecast
Low on Saturday and Sunday.
Solar UV Index
Low, but moderate in any sunny spells on Saturday and Sunday.
TOMORROW - Saturday 19th September
A mix of cloud and occasional bright spells to start tomorrow, with scattered showers possible in places, some heavy at times. Showers will become more isolated through the day, giving rise to more sunny spells in the evening. Highest temperatures of 14 to 17 degrees, with moderate to fresh and occasionally gusty southwesterly to westerly winds, stronger at times, especially in exposed coastal areas.
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.
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.