Key Takeaways
- Temperatures across England and Wales are expected to rise into the mid‑ to high‑20 °C on Saturday, while Scotland and Northern Ireland stay cooler with cloud, rain and brisk winds.
- From Sunday onward, much of the UK is forecast to surpass the heat‑wave threshold of 25‑28 °C, potentially producing three consecutive days of excessive heat and triggering the fifth widespread heatwave of the year.
- The summer of 2024 has already been extraordinary: July was the UK’s sunniest month on record and the driest July ever recorded for England and Wales.
- To date, 33 days have seen temperatures above 30 °C; the 1995 record of 34 such days is likely to be broken next week.
- For the first time, a temperature of 35 °C has been recorded in the UK during May, June and July; forecast models suggest August could join this streak if 35 °C is reached in central and south‑east England.
- Prolonged heat raises health risks (heat exhaustion, dehydration), strains water supplies, and increases fire danger; the public is advised to stay hydrated, limit outdoor exertion during peak hours, and check on vulnerable neighbours.
Introduction
The United Kingdom is bracing for another spell of unusually warm weather as a high‑pressure system settles over the British Isles. Meteorologists predict that temperatures will climb above seasonal averages starting this weekend, setting the stage for a potential heatwave that could persist well into the coming week. This summary expands on the brief forecast provided, placing it within the broader context of a record‑breaking summer and outlining what the public can expect.
Forecast for Saturday
On Saturday, temperatures across most of England and Wales are anticipated to rise into the mid‑ to high‑20 °C range (approximately 24‑28 °C). The warming trend will be driven by southerly airflow bringing warm continental air northward. In contrast, Scotland and Northern Ireland will experience comparatively cooler conditions, with highs hovering between 17 °C and 21 °C. These northern regions will also see increased cloud cover, intermittent rain showers, and a blustery wind, which will help temper the heat but also bring damp and breezy conditions.
Forecast for Sunday and Into Next Week
From Sunday onward, the high‑pressure system is expected to strengthen, allowing temperatures to climb even further. Many parts of the UK are forecast to exceed the heat‑wave threshold of 25‑28 °C, with some locales in the south and east possibly reaching the low‑30 °C range. Because the forecast calls for sustained warmth over several days, numerous locations could achieve the three consecutive days of excessive heat required to officially declare a heatwave. If this occurs, it would mark the fifth widespread heatwave of the year, underscoring the persistence of unusually warm conditions across the nation.
Heatwave Declaration Criteria
The UK Met Office defines a heatwave as a period of at least three consecutive days where daily maximum temperatures meet or exceed location‑specific thresholds, which generally range from 25 °C to 28 °C depending on the region. The forthcoming warm spell satisfies both the duration and intensity criteria for many areas, prompting forecasters to anticipate an official heatwave declaration. Such declarations trigger public health advisories, increased monitoring of vulnerable populations, and guidance for businesses and transport operators to mitigate heat‑related risks.
Record‑Breaking Summer Context
The summer of 2024 has already distinguished itself as one of the most extreme in recent memory. July alone set two notable records: it was the sunniest month ever recorded for the United Kingdom as a whole, and it was the driest July on record for England and Wales. These conditions have contributed to a cumulative buildup of heat, with sunshine durations far exceeding climatological norms and precipitation deficits limiting natural cooling mechanisms such as evaporation and cloud cover.
July Records and Their Implications
The unprecedented sunshine in July not only elevated daytime temperatures but also reduced nighttime cooling, leading to higher average temperatures over the month. The lack of rainfall exacerbated soil dryness, increasing the likelihood of surface heating and raising the risk of wildfires in rural areas. These factors have created a feedback loop where dry, sunny conditions foster higher temperatures, which in turn sustain the dryness—a pattern that has persisted throughout the summer and continues to influence the forecast for the coming week.
Days Exceeding 30 °C
To date, the UK has recorded 33 days where the maximum temperature surpassed 30 °C. This figure already places the summer among the hottest on record, nearing the benchmark set in 1995 when 34 days breached the 30 °C mark. Forecast models indicate that the upcoming warm spell will likely add at least one more day above 30 °C, thereby surpassing the 1995 total. Achieving this milestone would highlight the exceptional nature of the 2024 summer and reinforce concerns about the increasing frequency of extreme heat events in a changing climate.
Consecutive Months with 35 °C
Another striking milestone this year has been the recording of a temperature of 35 °C or higher in the UK during May, June, and July—the first time such a threshold has been reached in three consecutive months. This occurrence underscores the shifting baseline of what constitutes extreme heat in the UK climate. Forecasts for early August suggest that central and south‑east England could again approach or exceed 35 °C, which would extend the streak to four consecutive months and further emphasize the abnormal warmth gripping the nation.
August Prospects
Looking ahead to the end of next week, several forecast models indicate a plausible scenario where temperatures in central and south‑east England reach the mid‑30 °C range, potentially touching 35 °C. If realized, this would not only add to the tally of 30 °C‑plus days but also secure August as a fourth month with a 35 °C reading. Such a development would be unprecedented in the UK’s observational record and would likely prompt heightened alerts from public health agencies regarding heat‑related illness, dehydration, and the need for cooling centres.
Impacts and Public Health Advice
Prolonged exposure to high temperatures poses significant health risks, including heat exhaustion, heat stroke, and exacerbation of cardiovascular and respiratory conditions. Vulnerable groups—such as the elderly, young children, individuals with chronic illnesses, and those engaged in outdoor labour—are especially at risk. The Met Office and NHS advise the public to stay hydrated, avoid excessive alcohol and caffeine, wear lightweight clothing, seek shade or air‑conditioned environments during peak heat (typically 11 am–3 pm), and check on neighbours or relatives who may need assistance. Additionally, heightened fire danger in dry landscapes warrants caution with open flames, barbecues, and the proper disposal of cigarettes.
Conclusion
The UK is poised to experience another notable warm spell, with temperatures set to climb above average this weekend and potentially exceed heat‑wave thresholds for several days thereafter. This forecast fits within a broader pattern of an exceptionally hot and dry summer, marked by record sunshine, scarce rainfall, and numerous days above 30 °C. With the prospect of breaking the 1995 record for 30 °C‑plus days and possibly extending the streak of months with 35 °C readings, the current conditions highlight the increasing frequency of extreme heat events in the region. Continued vigilance, adherence to heat‑safety guidance, and proactive measures to protect vulnerable populations will be essential as the nation navigates this challenging weather pattern.