UK 35C Heatwave Forecast: August Temperature Surge to Affect 11 Counties
The UK is bracing for a fifth official heatwave of 2026, with weather models indicating that temperatures could climb back to 35C in the coming days. According to the latest GFS weather model data, maximum possible temperatures are expected to reach 35C on August 12, with the Midlands and south-east of England likely to experience the most intense heat.
The forecast shows that as many as 11 English counties could potentially see temperatures hit 35C or more later this month. These include Warwickshire, Lincolnshire, Northamptonshire, Hertfordshire, Buckinghamshire, Oxfordshire, Gloucestershire, Worcestershire, Herefordshire, Surrey, and Cambridgeshire. The highest readings are expected on August 12, with 33C possible as far north as Yorkshire, and 34C predicted for East Anglia on August 13.
While the mercury is expected to dip slightly this weekend, the reprieve may be short-lived. Temperature anomaly maps for August 11-13 show much of the UK shaded in dark red, indicating readings significantly above the seasonal average. This comes after the country has already experienced four heatwaves this year, with the latest one peaking at 35C this week, according to Yourweather.co.uk reports.
Met Office Outlook: Hot Weather Returns With Thundery Risk
The Met Office has indicated that temperatures could turn "very warm or hot" as August progresses, though there is also a chance of "thundery plumes" in some areas. The long-range forecast for August 5-14 suggests a "generally rather changeable period," with many places likely to see some much-needed rain or showers at times.
Mark Sidaway, deputy chief forecaster for the Met Office, noted that while some rain is possible, amounts "for many will be fairly modest, and won't balance out the shortfall that we have recorded this summer." This follows a period of exceptional dryness, with July set to be England’s driest month on record.
When Will Temperatures Peak?
According to the GFS model:
- August 11: Highs of 31C possible across much of eastern, central, and southern England, plus parts of Wales close to the border.
- August 12: Maximum possible temperatures of 35C in the Midlands and south-east, with 33C as far north as Yorkshire.
- August 13: 34C possible in East Anglia, with 31-33C across central, southern, and eastern England, and South Wales.
These temperatures would be sufficient to trigger a fifth official heatwave. An official UK heatwave is declared when temperatures meet or exceed a regional threshold for three consecutive days. The threshold is 28C in the south-east and drops to 25C in areas further from the south-east.
Context: A Summer of Repeated Heatwaves and Drought Conditions
The imminent fifth heatwave is the latest chapter in an exceptionally hot and dry summer for the UK. The country has already witnessed four heatwaves this year, with June breaking records when a sweltering 37.7C was recorded in Lingwood, Strumpshaw Hill. The third heatwave of 2026 ended in most areas last weekend, but persisted in some locations, such as Usk, Monmouthshire, and Exeter Airport, Devon, where temperatures exceeded heatwave thresholds for 19 consecutive days.
This relentless heat has had significant consequences. The Environment Agency has described the conditions as a "flash drought," affecting up to 28 million people across more than half of England, which has officially declared drought in many regions. Water companies have imposed hosepipe bans covering over 20 million Britons as the prolonged dry weather strains water resources.
The Human and Environmental Impact
The UK Health Security Agency issued Amber Heat Health Alerts across parts of eastern England, warning of increased risks to vulnerable people due to the combination of extreme heat and prolonged dry weather. The ongoing hot conditions also raise concerns about wildfire risks, as seen elsewhere in Europe, with massive wildfires currently raging in southwestern France and central Spain, forcing over 200,000 people to evacuate.
Despite the upcoming heat, the Met Office has pointed to a temporary change this weekend, with weather fronts moving south-east across the UK. While some areas, particularly in the north and west, will see rain and showers, many places, especially in southern England, are likely to receive little or no rainfall.
Perspective: A New Normal for UK Summers?
The repeated heatwaves of 2026 are part of a broader trend suggesting that such extreme summer temperatures are becoming more frequent in the UK. With five heatwaves potentially occurring in a single year, the pattern is pushing the country’s infrastructure and environment to its limits.
The "flash drought" conditions are particularly worrying, as they have developed much faster than traditional droughts. The Environment Agency's declaration affects just over half of England, a situation that would have been considered exceptional just a few years ago, but is now becoming disturbingly common. As the summer progresses, the focus will not only be on the immediate discomfort of high temperatures but also on the long-term implications for water security, agriculture, and public health.
The forecast for more "thundery plumes" adds another layer of complexity, potentially bringing sudden, intense downpours that may not be enough to alleviate drought conditions but could cause flash flooding in dried-out ground. This pattern of extremes — from scorching heat to sudden violent storms — is a characteristic of a changing climate.
For now, residents in the 11 counties expected to see 35C are advised to take precautions, stay hydrated, and check on vulnerable neighbors. While the heatwave will bring challenges, it is also a clear signal that the UK must adapt to a hotter, drier, and more volatile summer climate. The remainder of August is forecast to remain warmer than average, suggesting that this may not be the last heatwave of the year. In related news, the extreme weather patterns are being observed globally, with recent reports of Northern Lights Forecast: 9 States May See Aurora Tonight as CMEs Hit showing atmospheric disturbances, and Logan Fire Rages in Utah and BC: Evacuations, Crews Battle Blazes highlighting the wildfire crisis in North America.
Comments