The short version
- Long-range forecasts indicate a higher-than-normal probability of heatwaves during the first half of the autumn season.
- Persistent drought conditions across England and Wales remain severe, with soil moisture levels insufficient to mitigate rapid temperature rises.
- Elevated sea surface temperatures around the UK are expected to contribute to warmer land conditions through early September.
The United Kingdom is confronting a complex meteorological transition as the official summer season concludes. While recent days have brought unsettled conditions and rainfall after a prolonged dry spell, long-range projections point toward a return of extreme heat in September. This potential shift raises concerns about a sixth heatwave of the year, adding to an already exceptional period that the Met Office identifies as likely the hottest on record.
Current weather patterns show a temporary cooling trend, with temperatures expected to drop two to four degrees Celsius below the mid-August average for the remainder of the week. However, this brief respite does not guarantee a return to typical autumn norms. Meteorologists note that unless average temperatures fall significantly below normal levels in the final fortnight of August, the year 2026 will surpass the previous record set just twelve months ago.
The likelihood of further heat spikes stems from several compounding factors identified by weather data providers including MeteoGroup and the Met Office. Seasonal forecasts issued in June predicted a hotter-than-average summer driven by human-induced climate change and specific atmospheric patterns. These predictions have largely materialized, with July emerging as the driest month on record for England and Wales.
Drought conditions remain widespread and severe. More than two-thirds of England and all of Wales are currently classified as being in drought. The Environment Agency has stated that weeks of above-average rainfall are required to alleviate these conditions. The recent precipitation, while welcome, is insufficient to fully saturate the soil or resolve the underlying water deficit.
Dry soil plays a critical role in amplifying heat intensity. When ground moisture is depleted, solar energy is not consumed by evaporation but instead directly heats the air. This mechanism allows temperatures to rise more rapidly than they would under wetter conditions. Consequently, even modest increases in solar radiation can lead to significant temperature spikes if the ground remains parched.
Marine influences are also contributing to the risk of elevated temperatures. Sea surface temperatures around the UK are currently approximately three degrees Celsius above average for this time of year. This marine heat anomaly acts as a thermal reservoir, helping to maintain higher air temperatures on land. As high-pressure systems potentially establish themselves south of the UK in early September, they may draw additional warmth from continental Europe.
High pressure typically brings dry and sunny weather, which further inhibits cooling. The combination of dry soil, warm seas, and potential continental heat advection creates a favorable environment for another hot spell. The Met Office’s long-range forecast for the autumn months of September, October, and November indicates that the chance of a warm three-month period is higher than normal.
The agency specifically highlights an increased risk of heatwaves and related impacts during the first half of this autumn period. While precise timing remains uncertain due to the inherent difficulty in forecasting transitional seasons, the structural conditions for extreme heat are present. Residents and infrastructure managers must prepare for the possibility that summer-like extremes could persist well into September.
The broader implications extend beyond immediate comfort. The persistence of drought affects water resources, agriculture, and emergency services. With no sign of major improvement in soil moisture levels in the immediate future, the vulnerability of the region to heat-related stress remains high. Monitoring will continue as the season shifts, but the baseline risk for extreme weather events has been significantly elevated.
As meteorological summer ends on August 31, attention turns to the autumn outlook. The convergence of historical drought data, current sea temperatures, and atmospheric pressure models suggests that the UK cannot yet declare the heat crisis over. The coming weeks will be critical in determining whether the record-breaking trends of 2026 continue or begin to moderate.
Sources behind this briefing
Go to the original reporting
- BBC News↗Is another UK heatwave on the way in September?
