THE Met Office have revealed the weather forecast for the London Marathon with temperatures set to reach 20C.

Saturday’s weather was another sunny affair as Brits packed out beaches and parks across the country.

Seasonal Weather, Wimbledon Common, London, UK - 25 Apr 2026People enjoying the sunshine and warm conditions on Wimbledon Common, London, on Saturday Credit: Shutterstock Editorial A person in a house costume during a marathon, surrounded by other runners.Participants in the London Marathon 2025 Lyme Regis, Dorset, UK. 25th April 2026. UK Weather: Visitors and locals soak up the hot sunshine on the beach at the seaside resort of Lyme Regis. Credit: Celia McMahon/Alamy Live News.Lyme Regis, Dorset, yesterday as locals make the most of the higher temperatures Credit: Alamy

Sunglasses and ice creams were out in force as the mercury soared to 22C and today’s weather could see more of the same balmy conditions.

London is forecast to have sunny spells with temperatures of around 20C on the cards later in the afternoon.

The Met Office has urged those running in the marathon to “stay hydrated” as the conditions would be “on the warm side”.

Light winds are predicted, ideal for any racegoers, but runners should watch out for high UV and make sure to keep hydrated.

The Met Office predicts a dry, bright day perfect for spectating.

The forecaster said: “There will be some hazy spells of sunshine, the best of these across southern England and Wales.

“The risk of some showers, mainly across Scotland. Highs reaching 21C or 22C.”

Runners should prepare for rising temperatures in the late morning and early afternoon as they take on the 26.1-mile route.

Sunday morning will bring a chilly, misty start particularly in lower-lying areas.

Forecasters said: “Sunday’s London Marathon is likely to take place under largely dry and settled conditions.

“After a cool, potentially misty start, brighter spells should develop and temperatures will rise to feel warm for many by the afternoon.

“Light winds and dry weather point towards pleasant, spring-like day overall, well-suited to one of the capital’s biggest sporting events.”

The added that in more rural areas there might even be patches of frost despite highs of 19C.

Eastern should brace for overnight fog but it is expected to clear throughout the morning and bring in a clear day.

Across the country, inland areas are expected to be warmer as they are further from the cooler sea breeze.

But the weather may soon take a turn for the worse on Monday.

Heavy downpours could be on the cards in the north and east of the UK tomorrow.

UK weather forecast

Sunday

Early low cloud and any fog lifting in the east, then warm hazy sunshine England and Wales.

However, cloudier with showers Scotland and Northern Ireland.

Isolated showers elsewhere later.

Outlook for Monday to Wednesday

Showers in the north and east on Monday, some perhaps heavy. Otherwise some warm sunshine.

Mostly fine on Tuesday and Wednesday, though a strengthening easterly wind in the south.

Alamy Live News. 3EB9XGR Bournemouth, Dorset UK. 25th April 2026. UK weather: hot and sunny at Bournemouth beaches as visitors head to the seaside to make the most of the sunshine. Credit: Carolyn ...Bournemouth, Dorset, where Brits are out on the beach ahead of next week’s rain Credit: Alamy Bournemouth, Dorset, England, UK, 25th April 2026, Weather: Warm sunshine on the south coast with above average temperatures for mid spring. Credit: Paul Biggins/Alamy Live NewsDespite fog and frost in some of the country today and tomorrow are expected to be sunny Credit: Alamy