London Weather Forecast: 30°C Heatwave Set to Return After Two Days of Rain

London is often associated with its warm weather, but this summer has surpassed expectations. Recent weeks have been characterised by relentless temperatures exceeding 30°C, leading to uncomfortable commutes and a general feeling of swelter. Although temperatures have dipped slightly in recent days, forecasts suggest that the heatwave we’ve become accustomed to may return at the beginning of next month.

Upcoming Warm Weather Forecast

Weather predictions indicate a high of 31°C on Saturday, August 1, accompanied by some sunny intervals and light cloud cover—ideal conditions for a barbecue. This particularly warm day will follow nearly two weeks of temperatures consistently in the mid to high 20s, although not every day will be bathed in sunshine. A band of rain is expected to sweep across the capital early on Sunday, July 26, bringing light showers and breezy conditions that are likely to persist until Monday evening.

The wet weather is forecasted to linger, potentially causing disruptions through to August 1, before clearer skies are expected to return around 4pm. Notably, Netweather anticipates an even hotter day, with its projections indicating a peak of 31°C. The Met Office’s long-range forecast, covering the period from July 24 to August 2, supports these predictions of above-average temperatures along with intermittent rain. It states, “Northern and northwestern areas will be cloudier with occasional patchy rain or drizzle.”

Weather Variability Ahead

As we approach the weekend and possibly into the start of the following week, more unsettled weather is anticipated, particularly across northern regions of the UK. Rain may also extend to southern areas, though it is expected to be lighter and more sporadic here. Confidence in the weather patterns decreases as we near the start of August, but indications suggest that high pressure could make a return, leading to drier conditions, especially in the south. Winds are predicted to remain mostly light to moderate, with occasional fresh breezes along northern coasts.

Temperatures are expected to hover around or above normal, with the warmest conditions likely in the south, potentially leading to a resurgence of heat by early August. The Met Office has indicated that higher pressure systems are more likely than lower ones throughout August, suggesting the possibility of further hot spells, particularly in southern regions. Nonetheless, they have also cautioned about the likelihood of sporadic thunderstorms.

Thunderstorms and Their Aftermath

In late June, parts of London experienced severe thunderstorms accompanied by thunder and lightning, following a spike in temperatures. This extreme weather led to flash flooding in various streets and Tube stations, and was believed to have caused a house fire in Tooting. Thunderstorms often emerge following a heatwave, as the atmospheric conditions become unstable. This instability is typically due to a layer of very warm air near the surface being trapped beneath much cooler air at higher altitudes.

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