After a grey and drizzly start, Londoners can expect warmer and sunnier weather as the week progresses.
Tuesday, July 8, will see temperatures rise to 25°C, with a gentle southerly breeze bringing in warmer air.
Commuters can leave their umbrellas at home as the Met Office predicts no rain.
On Wednesday, July 9, the capital will experience long sunny spells, pushing temperatures to 26°C.
The city’s parks are expected to fill up by lunchtime as people take advantage of the warm weather.
With clear skies, ultraviolet levels will rise, prompting routine advice for sunscreen and hydration.
The real heat begins on Thursday, July 10, as a continental plume sends temperatures soaring to 30°C.
Public-health officials warn of heat-stress risks when temperatures peak at 30°C, particularly for the elderly and very young.
The scorching weather continues into Friday, July 11, with mostly blue skies.
The evening will offer little relief, with temperatures no cooler than 18°C.
These “tropical nights” can disrupt sleep and strain public-transport systems, so Network Rail is expected to impose speed restrictions on some lines after dark.
The sun will dominate on Saturday, July 12, with temperatures holding near 30°C.
Crowds are forecast to flock to outdoor spots from Greenwich Park to Hampstead Ponds, while retailers prepare for a surge in cold-drink sales.
With five consecutive dry days, the risk of grassland fires begins to increase.
The week will peak on Sunday, July 13, with a projected 31°C, potentially the capital’s hottest day of 2025 so far.
Although this is shy of the 40°C records set in 2022, the sustained heatwave is enough for the UK Health Security Agency to consider an amber heat-health alert.
Expect packed lidos, busy coastal trains, and a late-evening rush at riverside pubs as Londoners make the most of the hot weekend.
With the capital locked into a dry, sun-baked pattern through Sunday, authorities urge residents to check on vulnerable neighbours, carry water on public transport, and never leave pets or children in parked cars.
Relief may come early next week as Atlantic fronts look set to bring cooler, wetter air back across the UK.
