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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.
Live data from Open-Meteo · updates automatically ·
If you’re checking the weather forecast for a heatwave in the UK, expect a possible warm spell later next week, though it’s not yet certain. The Met Office suggests temperatures could rise, but official heatwave thresholds may not be met.
When could the heatwave arrive?
Current model runs point to a build of high pressure from mid-week onwards, particularly affecting southern and central England. The uk weather forecast heatwave met office outlook for the end of next week shows a 40–50% chance of reaching 28°C in parts of the South East. However, a heatwave uk next week is not confirmed — the definition requires three consecutive days above a regional threshold, and that remains borderline.
For the latest updates, see our 10 Day Weather Forecast UK page, which includes the 14 day weather forecast heatwave uk outlook.
What does the Met Office say?
The bbc weather and Met Office long-range forecasts agree on a trend toward drier, warmer conditions from around Thursday. Yet the uk spring weather forecast still contains variability, with a chance of showers early in the week. A 7 day weather forecast heatwave uk currently shows highs of 25–27°C in the south by Friday, but cooler air may arrive by the following Sunday.
If you’re in London, check our dedicated Heatwave London page for localised advice.
What is a heatwave in the UK?
A heatwave is defined by the Met Office as three consecutive days where the daily maximum temperature meets or exceeds a regional threshold, which ranges from 25°C in northern areas to 28°C in London.
Will it be a heatwave next week?
It’s too early to say. Current forecasts show a warm spell, but the three-day threshold may not be reached everywhere. The weather heatwave status will be clearer by Wednesday.
How should I prepare for possible hot weather?
Stay hydrated, keep curtains closed during the day, and check on vulnerable neighbours. The NHS advises avoiding alcohol and strenuous activity in peak heat. See our UK weather hub for more.