As high pressure dominates across central Europe, extreme heat has already been building in paces including Spain, Portugal and France. The French city of Nimes recorded its highest ever August temperature on Sunday of 41.8C (107F). Red extreme heat warnings in south-west France remain in place through Monday and Tuesday.
Some of that hot and humid air to our south will gradually spread north across the UK over the coming days.
On Monday, many parts of England and Wales will see temperatures in the mid to high 20s. The London area is forecast to be around 30C whilst Scotland and Northern Ireland will remain a little cooler with highs in the low 20s.
By Tuesday, the warmth will become more intense and widespread as the heatwave reaches its peak.
Most of the UK will record temperatures between 24 and 30C, with the hottest conditions again focused on London and the Midlands which could reach 34C (93F). It’s not currently expected to beat the UK’s hottest day of 2025, which so far stands at 35.8C (96F) recorded on 1st July in Faversham, Kent.
Wednesday will be another hot day for many, but probably not quite as hot as Tuesday, due to a small shift in wind direction. Heatwave criteria is likely to hold on across central and eastern parts of England, east Wales and eastern Scotland.
Yellow heat health alerts will be in place for the whole of England from Tuesday morning until Wednesday evening, with amber alerts in place for London, the South East, East of England, East Midlands and West Midlands
As well as heat by day, the nights will also feel hot and humid for the first half of the week. There is a chance of a tropical night or two in southern England, where temperatures don’t fall below 20C all night.
By Thursday and Friday, whilst most places will see temperatures in the low to mid 20s, we could record further heatwave days in southern England.
