Britain could soon be basking under a searing summer sun as new models hint at the arrival of a full-blown before June is out. The latest weather maps dramatically from June 26, marking the start of a that may push thermometers to a blistering 34C.

By 6pm on June 26, conditions in parts of Worcestershire and Shropshire are expected to surpass the , with the mercury soaring to around 30C. Not far behind, much of the East, Southeast, Wales, and the Midlands will see widespread warmth, with readings between 23C and 29C. Major cities including , Birmingham, , and Cardiff are forecast to swelter under the summer blaze.

But the heat won't stop there as June 27 is poised to turn up the thermostat even further. A wave of intense heat is projected to grip areas including Leicester, Wolverhampton, Wiltshire, Shropshire, parts of Surrey, and the Cotswolds, where temperatures could hit 31C and beyond. Then on June 28, forecasters predict Northampton could be engulfed in heat as high as 34C by early evening.

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Even northern parts of England and , though spared somewhat from the extreme highs, won't miss out on the summer surge. Temperatures there are expected to hover in the mid-to-high 20Cs, with certain areas reaching up to 27C on Friday.

The defines a heatwave as a period of at least three consecutive days where maximum temperatures meet or exceed specific thresholds, which vary by region but generally fall between 25C and 28C.

It comes as the UK recorded its warmest day of the year so far on Friday, as temperatures hit 29.4C, the Met Office said.

Extreme heat arrived as the forecasting body announced thunderstorms were “pushing into” the English Channel, ahead of an amber weather warning for severe thunderstorms coming into force.

Santon Downham, in West Suffolk, enjoyed the hottest weather on Friday, just breaking the previous record for 2025 which stood at 29.3C, recorded on May 1 in Kew Gardens, west London. Scotland also experienced its hottest day of the year so far as temperatures in Lossiemouth hit 25.7C.

“Today has been very warm for much of the UK, and hot in the South East where temperatures were comfortably 9C or 10C higher than the average expected for this time of year,” a spokesperson for the Met Office said.