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Live forecasts update automatically; written guidance last reviewed 15 June 2026 by the National Report weather desk. Data from national met services via Open-Meteo.
If you’re in London, prepare for temperatures climbing into the low 30s this week. A heatwave is forecast from Thursday, so stay hydrated, keep curtains drawn, and check on older neighbours. Here’s what the next few days look like.
How hot will it get and when will it peak?
Temperatures in central London are expected to reach 33°C on Friday, with the hottest part of the day between 1pm and 4pm. The heatwave forecast for the UK suggests this will be the most intense spell so far in 2025, though a breakdown is likely by Sunday evening as cooler Atlantic air moves in. Overnight lows may stay above 18°C, making sleeping difficult without a fan.
What health and safety steps should you take?
With UV levels peaking at 8 (very high), the main risks are dehydration, heat exhaustion and sunburn. The NHS advises drinking plenty of water, avoiding alcohol, and never leaving children or pets in parked cars. If you’re heading outdoors, wear a hat, apply SPF 50, and take breaks in the shade. For the latest warnings, check the 10-day UK forecast regularly.
Will this heatwave be as bad as the London heatwave of 2022?
No – the record 40.3°C in July 2022 was extreme. This week’s peak looks closer to 33°C, which is more typical of a summer warm spell. Still, it’s wise to follow precautions as humidity can make it feel hotter.
Is there any risk of thunderstorms after the heat?
Yes – the UK Met Office has issued a moderate rainfall warning for Sunday evening as a cold front arrives. Brief, heavy downpours and localised flooding are possible, especially across southern counties.
What’s the outlook for the London heatwave 2026?
Long-range models suggest a higher chance of above-average temperatures next summer due to a developing El Niño pattern, but specific heatwave dates won’t be reliable until closer to the time. Keep an eye on our UK weather hub for updates.