UK heatwave on cards as weather forecasters reveal exact days Brits will see 27C

The UK could be on the brink of welcoming the first official of the year in the coming days as to 27C.

forecasters say with several parts of the south east set to bake in hot conditions. Wednesday and Thursday next week appear to be set to be the , with 27C expected in , Berkshire, Hampshire, and possibly Kent and East Anglia. Whether or not it is an official heatwave will depend on if there are three consecutive days of temperatures hitting the official heatwave threshold, which differs around the UK.

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The conditions are expected to bring in a new hottest day of the year, with 2025’s current record day coming earlier this month when temperatures rose to 24C for the first time. Grahame Madge, a spokesperson, said: “This would always have been a naturally warm spell.

“However, with the footprint of climate change, you can expect it to add a degree or so to the values that we would have expected. It’s likely the temperatures for this event will be slightly higher. Now, as that front moves south, it will be pulling in cooler air behind it. Not cold air, but cooler air.

“That will clip temperatures. So, there’s a lot of emphasis on when this cold front will start to move and how much progress it will make during Thursday. At the moment, it looks as though we’re probably not going to see heatwave conditions met.”

The official heatwave threshold is 25C for most of the UK, with slightly higher numbers for the south and east, and rising to 28C in London. Mr Madge said any chance of a heatwave depends on the progress of a cold front which is expected to move south.

Dry and sunny conditions are expected for the thousands taking part in the TCS London Marathon on Sunday, with highs of 22C forecast for the capital. The warmer comes after a difficult period for fire services which battled wildfires earlier in month across the country following historically low rainfall in March.

David Oliver, Met Office deputy chief meteorologist, said: “Despite media speculation, next week’s conditions are likely to fall just outside of official Met Office heatwave thresholds.

“However, this shouldn’t lead to any disappointment as many can anticipate a very fine spell of weather with temperatures reaching 27C during the middle of the week.”

The highest recorded April temperature was way back in 1949 when Camden Square in London recorded 29.4C on April 16. Met Office Chief Forecaster Matthew Lehnert said: “We are not expecting the April UK temperature record to be broken, but some locations may nudge local records.”