Ulster
Issued at: 17 September 2026 16:30
TODAY - Thursday 17th September
It will remain fresh and blustery this evening with a mix of sunny spells and scattered showers. The showers will be mainly in the eastern half of the province and clear throughout the evening. All in moderate to fresh and gusty westerly winds.
TONIGHT
It will be mostly dry at first tonight with clear spells and isolated showers. Cloud will build from the west overnight with patchy rain and drizzle developing in western counties towards the morning. Lows of 9 to 12 degrees with mostly moderate west or southwest winds, fresher for northern and western coasts.
Pollen Forecast
Low on Friday and Saturday.
Solar UV Index
Generally low but moderate in any sunny spells on Friday and Saturday.
TOMORROW - Friday 18th September
Largely cloudy tomorrow with outbreaks of rain spreading from the west during the morning along with mist and hill fog. The rain will become patchier during the afternoon and will clear into showers later in the day. Highs of 15 to 17 degrees in moderate to fresh and gusty southwest winds, stronger for exposed coasts.
National Outlook
Overview: Becoming drier and more settled as high pressure builds.
Friday night: Mostly cloudy at first with patchy rain and drizzle, along with mist and hill fog, becoming confined to southern areas as clear spells and isolated showers follow from the northwest. Temperatures will not fall below 11 to 15 degrees in moderate to fresh west or southwest winds.
Saturday: Rain, drizzle and mist will clear from southern areas in the morning to leave a mix of sunny spells and well scattered showers, most frequent over the northern half of the country. Highest temperatures from 15 degrees in the northwest to 20 degrees in the southeast, all in moderate to fresh westerly winds, stronger in the northwest.
Saturday night: Dry for most with clear spells and just a few showers, mainly in the northwest. Lowest temperatures of 8 to 12 degrees with westerly winds decreasing light to moderate.
Sunday: Mostly dry early on with a mix of cloud and sunny spells though a few stray showers will occur, mainly in the north and west. Cloud will thicken in the southwest and west with some light rain or drizzle possible. Highest temperatures of 14 to 18 degrees in light, occasionally moderate westerly or variable breezes.
Monday: Mild and rather cloudy with just some bright or sunny spells developing. While there will be a good deal of dry weather overall, patchy rain and drizzle will occur along with some mist and hill fog. Highest temperatures of 17 to 21 degrees in light, occasionally moderate southwesterly winds.
Further Outlook: Current indications suggest that high pressure will be the main driver of our weather for midweek. While there will be some rain or showers, there will be plenty of dry weather. Highs will reach the high teens to low twenties.
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.