Nick Finnis Says UK Temperatures Will Reach 30C by Friday — Weather In London
Weather in london is set for a sharp warm-up this week, with temperatures across the UK forecast to rise from 26C to 29-30C by Friday. Nick Finnis, a Netweather forecaster, said the south of the UK could tap into heat moving across mainland Europe, while thunderstorms could also develop.
The incoming warmth is being driven by a 1200 mile continental heat bubble moving across Europe toward the British Isles. The UK is expected to be hotter than 28C Terrasini in Sicily, Italy, with the south largely dry until the weekend and the north facing spells of rain.
Nick Finnis on the south
Finnis said: "The south of the UK has potential to tap into the heat dome over mainland Europe, which is rising to the mid-30s in France. But there is also the potential for thunderstorms in Britain."
A Met Office forecaster gave a similar view, saying: "It will potentially turn very warm, if not rather hot and humid, from midweek – especially in the South-East. There is the chance of thunderstorms developing. “The North and West will have rain at times, although hot conditions in the South could return north later, with a thunderstorm risk.”"
Midweek weather in England
The Met Office also posted on X that generally warm weather is expected this week, with parts of England, especially the southeast, turning very warm, if not rather hot and humid, from midweek. Tuesday is the point at which temperatures are expected to start rising before the stronger heat builds toward Friday.
Temperatures in the north are expected to stay in the low to mid 20s while the south stays warmer and drier for longer. That split leaves different parts of the country dealing with different conditions at the same time, rather than one uniform spell of heat.
Weekend thunderstorms
Thunderstorms could threaten flood risks in the South on Saturday and Sunday, with heavy rain possibly appearing further north too. The Met Office long-range outlook says a hotter-than-usual summer is much more likely than cooler-than-average, and the source says weathermen backed a three-month bake until September.
For readers in the South-East, the practical shift comes by midweek: the hotter air arrives first, then the weekend brings the risk of storms. Those in the North and West are set to see more rain at times, while the north of the UK remains in the low to mid 20s as the heat builds farther south.
