But the warm weather will not be limited to the south of the UK, with the mercury predicted to reach the high teens in northern areas.
Edinburgh will enjoy clearer skies and more sunshine, with temperatures of around 15 degrees today, and 16 degrees over the Easter weekend.
The south of Scotland can expect some showers.
“It’s looking like Friday will be the warmest day of the year with highs of 22 to 23C, probably most likely in London,” Steven Keates said.
“The current highest temperature is 20.8C which was recorded in two places – St James Park in London on 23 March and Treknow in Cornwall on 25 March – so we should beat that tomorrow. Widely, it will be quite a warm day.”
Mr Keates said although there may not be uninterrupted blue skies, most areas of the UK would enjoy sunny spells and high temperatures.
He urged beach-goers to “stick on the sunscreen” and drink plenty of water to protect against higher-than-average UV levels.
The strength of UV rays could hit 6, which is considered “high” on the Met Office’s index but some coastal areas may experience “misty and murky” conditions caused by cloud earlier in the day.