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UK Braces for Surprise Indian Summer Heatwave in September
10 Sep
Summary
- UK to experience temperatures up to 23°C on September 20
- Warm weather expected across southern, central, and northern regions
- Met Office forecasts "generally unsettled" conditions in mid-September

As of September 10, 2025, the UK is bracing for an unexpected Indian Summer heatwave later this month. According to weather maps, the country is predicted to experience temperatures above 20°C, with highs of 23°C expected on September 20.
The warm spell is set to cover a wide area, including the south-east, East Anglia, the Midlands, the Welsh borders, and parts of northern England. The counties expected to see temperatures of at least 20°C include Norfolk, Suffolk, Kent, Essex, and many others across the southern and central regions.
However, the Met Office forecasts that the overall weather pattern in the UK will be "generally unsettled with low pressure dominating much of the period" between September 14 and 23. This suggests that while the country will enjoy a brief respite from the typical autumn chill, the warm conditions may be interspersed with more unsettled weather in the coming weeks.