Weather in central London
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The Met Office has issued a forecast for thunderstorms and heavy rain across London on Friday afternoon, after a sunny start to the day. The warning follows a summer that saw temperatures reach 38.1 °C, the highest on record for the capital.
Londoners can expect warm spells in the latter half of September, according to the Met Office. Following an exceptionally hot summer, temperatures are predicted to reach up to 25°C mid-week, with drier conditions anticipated for the capital.
The BBC forecasts thunderstorms lasting around nine hours across London this bank holiday weekend, with temperatures between 15°C and the early twenties. Notting Hill Carnival’s family day on Sunday may be wet, while Monday is expected to be dry and clear.
Londoners are being warned of potential travel disruption and flooding as intense thunderstorms are forecast for Wednesday and Thursday. The Met Office has issued yellow warnings, advising of heavy rain, lightning, and hail, with drivers cautioned about increased skidding risks on roads.
A partial lunar eclipse, expected to obscure 93 percent of the Moon, may be obscured by cloud and rain in London. The Met Office has warned of heavy showers and thunderstorms from Wednesday, with a 50 percent chance of rain during the eclipse.
The Notting Hill Carnival, expected to draw two million attendees, faces a forecast of rain and thunder over the bank holiday weekend from August 29-31. Forecasters warn of potential washouts, particularly on Sunday and Monday.
Barnet residents will experience warm weather until 16 August, but the Met Office confirms it will not meet the heatwave threshold. Temperatures will peak at 28°C but fail to sustain the required three-day streak, according to BBC and Met Office forecasts.
July 2024 marked the first month without recorded rainfall at Kew Gardens since 1871, confirmed by Met Office data. Surbiton’s Hogsmill gauge also registered zero precipitation. The dry spell highlights London’s unpreparedness for prolonged droughts, with implications for water management and urban planning.
Barnet residents face an amber health alert from 3 to 5 August 2026 as temperatures reach 33°C. The UK Health Security Agency warns of higher mortality among older adults and pressure on care services. Cooling measures are advised, with fresher weather expected by midweek.
The London Fire Brigade recorded its busiest 24 hours of 2026 on Wednesday, responding to 63 grass fires as temperatures topped 30C. Significant blazes in Hornchurch and Rainham required specialist equipment to control, while Natural England maintains a very high fire severity index.
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