Wales could see highs of 26°C as temperatures rise into the weekend, but it will be short lived as the front will also bring an increasing chance of thundery downpours of rain on Saturday.
On Friday, low-pressure will be positioned to the west of Scotland, continuing a theme of unsettled weather to much of Scotland as well Northern Ireland. However, further south, temperatures will start building on Friday, and could reach 30°C in some isolated spots in the east and southeast.
Wales weather forecaster Derek Brockway says that temperatures could reach highs of 26°C saying: "Friday the hottest and sunniest day of the week in Wales and feeling more humid with a south to southeasterly breeze."