The shorts and T-shirt weather is here to stay with forecasters predicting the mercury will hit 30C in some places this weekend.
Andy Murray became Wimbledon champion on the hottest day of the year so far, and the temperatures look like they will climbing again next Saturday.
Temperatures reached 29C at Heathrow and Kew Gardens in London on Sunday, with much of the rest of the country also enjoying warm sunshine.
Beaches up and down the country were also packed, leading to more than 250 call-outs to the coastguard.
Sky News weather forecaster Isobel Lang said cloud would move in mid-week, lowering temperatures to the mid to low-20s.
But a "high will build again through this coming weekend and temperatures will rise up again, probably to 30 or 31C", she added.
Lang said it would be a fine, very warm week, but cloud might affect northern and western parts at times.
The dry, sunny weather will be welcomed by cricket fans with England's first Ashes test against Australia getting under way at Trent Bridge on Wednesday.
The T In The Park music festival also begins in Kinross-shire in Scotland on Friday.
Forecasters have previously said this July is set to be one of the warmest since 2006 when a fortnight-long heatwave brought temperatures of over 30C.
But police have also warned of the dangers of the hot weather after a teenage boy died while swimming in a lake at an old quarry at the weekend.
Russell O'Neill, from Worcester, had been swimming at Gullet Quarry near Malvern in Worcestershire when he failed to resurface on Saturday afternoon.
The 17-year-old's body was recovered by a dive team from South Wales Police at around 4.50pm.
Speaking after the incident, Detective Inspector Richard Reese, of West Mercia Police, said: "This appears to have been a tragic accident and our thoughts are with the boy's family and friends at this sad time.
"While it is too early to give a cause of death, we would like to take this opportunity to remind people about the dangers of open water.
"With the warm weather upon us and the school holidays approaching, we would advise people to think twice about going into local rivers, lakes and canals in order to cool off."
See the latest weather forecast here