Sunny weather and soaring temperatures are set to continue as the mercury is expected to hit sweltering highs of 29C today.
The heat will remain until the middle of the week across the UK, with the south likely seeing the hottest temperatures of the year so far on Tuesday.
But the unseasonably warm period will give way to more changeable weather from Wednesday, just days after the relaxation of coronavirus lockdown measures.
It comes after forecasters confirmed May was the sunniest calendar month on record, and spring was the sunniest spring.
Met Office meteorologist Marco Petagna said: "From Tuesday we are starting to see some more unsettled weather across Scotland and the gradual trend will be turning cooler across the UK from Wednesday.”
He said northerly winds will bring cooler air and some areas in the south of England could experience thundery showers.
The warm end to the month confirmed a significant milestone for the UK with the nation recording its sunniest spring since records began in 1929.
The Met Office recorded more than 573 hours of sunshine between March 1 and May 27, beating the previous record of 555.3 hours which was set in 1948.
It is also expected to be the driest May for 124 years, with official figures on rainfall to be published.
People across England took advantage of the hot weather over the weekend to visit beaches and beauty spots, despite some authorities urging the public to stay away.
Nancy Platts, leader of Brighton and Hove City Council, asked people not to visit the area on Sunday and called on the Government for more powers to implement a local lockdown.
As revellers enjoyed temperatures of up to 28C (82.4F), emergency services attended incidents involving water, fires and littering, despite warnings being issued to the public.