Brits are set to bask in scorching 30C heat this weekend, with temperatures expected to be higher than in Ibiza and St Tropez.
While the end of May will be cool and damp for many, tropical air will arrive in the country by Saturday bringing a balmy start to June.
Forecasters predict London and the south-east will get the best of the weather once the mercury soars.
Met Office spokesman Grahame Madge said: "The indication is that we could see highs of 28C (82F), isolated highs of around 28C, on Saturday, and the most likely candidate places for those would be places like Norwich, north London, those sorts of areas away from the coast, but in the south-east corner of the UK.
"And on Sunday we could see highs of 29C, even possibly 30C.
"So Sunday looks very much as though it's going to be a warmer day than Saturday. So we have got that warmth coming through.
"Once this warm front, and the air behind it, starts to pull across the UK then we will see temperatures starting to rise."
However a potential frost is expected before the hot weather arrives.
Mr Madge said conditions have been quite cool and there is a possibility of sleet and even snow showers in the Scottish highlands.
Parts of England could see a frost in isolated areas on Tuesday night and the next few days.
There will be a "fundamental change" once the warm front, known as tropical maritime air, starts to draw the warmer air across the UK, the Met Office spokesman said.
"Tonight, for example, some parts of England could see a frost before this warm front starts to work its way across.
"We're expecting its arrival overnight so probably getting into the western parts of Britain by just after midnight.
"And then it will work its way across, reaching all parts of the UK by later in the week and the weekend," he said.
Bookmaker Coral makes this June 2-1 to be the hottest since records began.
