UK Heatwave Forecast: When Will It End and How Hot Will It Get?

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Key Takeaways

  • The Independent relies on reader donations to fund ground‑breaking, paywall‑free journalism on topics ranging from reproductive rights to climate change.
  • In 2026 the UK experienced its first ever recorded stretch of temperatures ≥35 °C in May, June and July, breaking long‑standing June records.
  • A third heatwave of the year is underway, with temperatures expected to stay in the low‑30 °C range across much of England and Wales through at least the second week of July.
  • The Met Office forecasts continued settled, dry and very warm conditions, only isolated showers possible, and warns of high UV and pollen levels.
  • Natural England has placed large parts of England at “very high” wildfire risk, while the UK Health Security Agency issues yellow heat alerts covering most of the nation.
  • Public health advice includes staying hydrated, using sun protection, checking vehicle fluids and tyre pressure, and being cautious around water to avoid cold‑water shock or drowning.
  • Although temperatures will ease slightly by the weekend, the overall pattern of fine, dry, very warm weather is likely to persist into the following week, with heatwave thresholds possibly still met in the southwest.

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Record‑Breaking UK Temperatures in 2026
The Met Office has confirmed that 2026 marks the first time the United Kingdom recorded temperatures of at least 35 °C in May, June and July of the same year. May and June each delivered sweltering heatwaves, with June’s peak reaching 37.7 °C—surpassing the previous June record set during the summer of 1976. The highest temperature logged so far in July was 35.5 °C at Wisley, Surrey, recorded last Thursday, indicating that the hot spell shows little sign of abating.

Details of the June and July Heatwaves
June’s heatwave was particularly intense, pushing temperatures into the high‑30s across much of England and Wales. July has continued the trend, with the second week of the month forecast to maintain readings above 30 °C in many areas. The Met Office predicts a sunny and very warm start on Monday, followed by more sunshine on Tuesday, with only low cloud in the North East while the rest of the country enjoys clear skies.

Forecast for the Second Week of July
From Wednesday to Friday, most regions are expected to experience “dry, sunny and very warm” conditions, with temperatures peaking around 30 °C–32 °C across parts of England and Wales. Met Office deputy chief forecaster Steven Keates noted that the overall pattern remains settled, characterized by abundant sunshine and limited rain. He added that isolated showers and thunderstorms may occur in southern England on Wednesday and Thursday, but these are likely to be sporadic, leaving many areas dry throughout the week.

Weekend Outlook and Shifting Pressure Systems
By the weekend, high pressure is anticipated to rebuild from the northwest, reducing the chance of showers and ushering in a return to more widely settled, dry and still warm weather. Temperatures will ease slightly compared with the midweek peak but will remain fine and warm for many locations. The gradual northward migration of this high‑pressure system is expected to shift the focus of the hottest conditions toward the southwest of the UK.

Wildfire Risk Elevated Across England
Natural England’s fire severity index has classified large swaths of England as being at “very high” risk of wildfires. The combination of prolonged heat, low humidity and abundant sunshine creates ideal conditions for fires to ignite and spread. Authorities urge the public to exercise caution with open flames, barbecues and discarded cigarettes, especially in rural and forested areas.

How Long Will the Heatwave Last?
Although temperatures are set to trend down marginally this week, there is no definitive end in sight for the current heatwave. Met Office deputy chief forecaster Tom Crabtree explained that while the southeast may see a slight easing through the weekend and into next week, the warm weather will not end abruptly. High pressure is expected to dominate much of the following week, gradually moving northwards, which will establish an easterly wind in the south and shift the hottest conditions toward the southwest. Consequently, some areas that have experienced the peak heat may begin to cool, but the southwest is likely to remain very warm, with heatwave thresholds possibly still being met.

Health Alerts and Potential Impacts
The UK Health Security Agency (UKHSA) has issued several yellow heat alerts that remain in effect until 9 p.m. on Friday, 17 July, covering all regions except Yorkshire and the North East. These alerts signal likely impacts on health and social care services, including a rise in mortality, particularly among those aged 65 + or with underlying health conditions. The UKHSA also warned of an increased risk of water‑related incidents, such as cold‑water shock and drowning, as more people seek relief in lakes, rivers and coastal waters.

Public Health Advice for the Heat
Met Office forecaster Steven Keates urged the public to take the usual precautions: stay hydrated, use sunscreen, wear protective clothing and seek shade during the hottest parts of the day. He emphasized that the UK is currently experiencing its third heatwave of the year, though this particular episode is not expected to break records. Nonetheless, the combination of high temperatures, elevated UV levels and high pollen counts poses multiple health risks that warrant vigilance.

Travel and Vehicle Safety Recommendations
National Rail Enquiries has advised train passengers to check for service updates, as heat can affect rail infrastructure and cause delays. Vehicle breakdown rescue companies anticipate heightened demand due to the heat’s impact on engines and tyres. Tony Rich, a spokesperson for the AA on road safety, reminded drivers to treat heat with the same seriousness as ice or heavy rain. He recommended checking tyre pressure, coolant and oil levels, and carrying ample drinking water for all occupants—including pets—before embarking on journeys.

UV and Pollen Warnings
Throughout the week, UV levels are forecast to be high or very high across many parts of the UK, prompting the Met Office to advise consistent use of sun protection, such as broad‑spectrum sunscreen, hats and sunglasses. Pollen concentrations are also expected to be high or very high in certain areas, which may exacerbate symptoms for asthma and hay‑fever sufferers. Individuals with sensitivities should monitor local pollen forecasts and consider limiting outdoor exposure during peak pollen periods.

Looking Ahead: Continued Warm, Dry Conditions
While a modest temperature dip is anticipated by Saturday, the overarching signal points to continued fine, dry and very warm weather for many parts of the UK into the following week. The Met Office suggests that there remains a chance of thunderstorms spreading into the south and southwest, but these are unlikely to bring substantial relief. As the heatwave persists, residents are encouraged to heed health advisories, stay hydrated, protect their skin, and remain alert to fire and water‑related hazards. The Independent’s ongoing coverage will keep readers informed of any developments, reinforcing the vital role of reader‑supported journalism in delivering accurate, timely information during challenging times.

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