Weather in central London
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BBC forecasters say London will not see a heatwave in September, with Met Office temperatures forecast between 24 °C and 19 °C. Thames Water’s hosepipe ban, issued on 23 July, remains active for Barnet, and the Environment Agency warns the drought will persist until nationwide rainfall resumes.
The BBC gives a 47% likelihood of thunder and lightning at about 10 am on Sunday 13 September, and the Met Office expects rain between 5 am and 11 am. Temperatures will reach 23 °C, dropping to 16 °C overnight, prompting residents to carry umbrellas.
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.
A 19-hour yellow weather warning for thunderstorms has been issued for Greater London, with predictions of up to 50mm of rainfall in a few hours, increasing the risk of flash floods and disruption.
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.
Residents in Barnet and across London can expect thunderstorms and a week of rain from 18 August, following record-breaking temperatures of 38.1°C on 13 August. The Met Office and BBC Weather forecast cooler conditions, with showers lasting until 27 August, though the bank holiday weekend may stay dry.
A yellow heat alert is active across London until next week, with temperatures reaching 32C on Sunday. The UK Health Security Agency warns of increased strain on health and social care services, particularly for older residents and those with health conditions.
Barnet residents face continued heatwaves into September and an ongoing hosepipe ban after Thames Water reported a 15% drop in water storage. The UK Health Security Agency has extended its amber heat alert, while Affinity Water and Essex and Suffolk Water have also imposed restrictions.
Residents in Barnet and across London are warned of prolonged dry conditions after July became the driest on record. Supermarkets have withdrawn disposable barbecues due to wildfire risks, while forecasters predict little rainfall for weeks.
Barnet remains under an amber heat health alert until 9 am on 14 August, with temperatures expected to reach 28 °C on Tuesday. The Met Office warns of increased health risks, particularly for residents aged 65 and over, as the capital faces prolonged dry conditions and water restrictions.
England and Wales experienced their driest July on record in 2026, according to provisional Met Office statistics. Nineteen counties recorded 1mm or less rainfall, while southern England saw its hottest July, with the UK and England marking their second hottest.
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.
Barnet has recorded 38 consecutive dry days since 23 June, matching the capital’s drought. The Met Office confirms England and Wales had their driest July on record. Light rain is forecast for 10 August, but experts say prolonged rainfall is needed to ease restrictions.
London recorded its first rainfall in weeks on 30 July 2026, with light showers in Croydon and Richmond delivering less than 0.5mm per hour. The capital remains under a Thames Water hosepipe ban amid prolonged drought conditions.
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