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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the MarketUK weather desk. Data from national met services via Open-Meteo.
Meteorological summer ended on 31 August, but for most of the UK the feel of summer lingers into mid-September, with daytime highs still reaching 18–22°C in southern England. The practical answer: summer is effectively over for heatwaves, though mild spells can still occur.
What do the numbers say about summer ending?
The Met Office defines summer as June, July and August. By that measure, summer is over. However, the 90-day weather forecast UK models suggest a transition to cooler, wetter conditions through September, with average temperatures dropping 3–5°C from August peaks. The chance of a heatwave (three consecutive days above 25–28°C, depending on region) falls below 10% after mid-September. For those asking “when is the next heatwave in the UK”, the most likely window for any late warmth is the first week of September, after which Atlantic systems dominate.
Will summer 2026 be hot in the UK?
Long-range outlooks for “will summer 2026 be hot UK” remain uncertain this far out, but the trend over the past decade shows a higher frequency of 30°C+ days in southern England. For now, the immediate answer to “is summer over in UK” is yes for sustained heat, though occasional warm days can occur into October. Check our 10 Day Weather Forecast UK for the latest outlook, or see Birmingham Weather for regional details.
Is summer over yet, like the Zara Larsson song?
The phrase “is summer over yet” from Zara Larsson’s song is a cultural reference, not a weather term. Meteorologically, summer ended on 31 August, but the feeling of summer can persist into September with mild days.
When is the next heatwave in the UK 2026?
No heatwave is forecast for the remainder of 2025. For 2026, the first potential heatwave window is typically late May to June, but reliable predictions are only possible 5–10 days ahead. Check our UK weather hub for updates.
Is summer over in the UK for good this year?
For practical purposes, yes—the chance of a heatwave drops sharply after mid-September. However, brief warm spells (20–24°C) can occur in early autumn, especially in southern England. The sun is lower, so UV and heat intensity are reduced.