National Forecast

Issued at: 20 August 2026 19:30

TONIGHT

Generally dry overnight with clear spells. However, lingering showers will affect southern counties early on, with scattered showers affecting west and northwest counties for the rest of the night. Cooler than recent nights with lowest temperatures of 6 to 10 degrees, in light to moderate northwest breezes.

TOMORROW - Friday 21st August

Friday will bring a mix of sunshine and passing showers. Showers will mainly affect the North and West early on, gradually feeding into other areas during the afternoon and evening, some turning heavy. Showers will be mainly confined to the East and Southeast by evening. Highest temperatures of 14 to 19 degrees, best values further south, all in light to moderate northerly winds.

National Outlook

Overview: Becoming largely dry for the weekend and start of next week with mainly light winds and some overnight mist and fog.

Friday night: A few isolated showers in the north and west but otherwise dry with long clear spells. Lowest temperatures of 7 to 11 degrees in light northwest or variable winds.

Saturday: Most places will be dry with sunny spells on Saturday. There's just the chance of a stray light shower in the northwest. Highest temperatures of 15 to 19 degrees in light northwesterly winds.

Saturday night: Largely dry with long clear spells. Mist and fog will develop in near calm conditions. Lowest temperatures of 7 to 11 degrees.

Sunday: Mist and fog will gradually clear on Sunday morning and it'll be a largely dry and bright day apart from isolated showers. Highest temperatures of 15 to 19 degrees in light and variable winds.

Sunday night: Another dry and clear night with mist and fog patches forming towards morning. Lowest temperatures of 7 to 12 degrees in light southeast to east winds.

Monday: Mainly dry and bright Monday, cloudier conditions with some showers may move up from the south later in the day. Highest temperatures of 17 to 21 degrees in moderate southeasterly winds.