While it said it is unlikely the country will have its hottest April or Easter, there could be record temperatures on Good Friday, Easter Sunday and Easter Monday.
In 2011, Britain saw the hottest-ever Easter Sunday and Monday.
In London, retailers were forced to shut their blinds to prevent window displays stuffed with chocolate from melting, while social media lamented the baking conditions which softened their eggs on trains and in cars.
Although there may be some cloud cover, temperatures today will reach 19C, before peaking at 20C tomorrow, according to Met Éireann.
The UK is enjoying a sunny Easter Monday, with the dry, bright and warm conditions which have marked a glorious bank holiday weekend continuing.
Saturday was the hottest day of the year so far with 25.5C (77.9F) recorded in Gosport, Hampshire.
Andrew Cawley DCT Media Kenny MacIver twelve buried in the sand with his 4 month old puppy German Shepherd Rocky
The Met Office says the nation is well on the way to having record-breaking Easter Sunday temperatures.
Southern England and South Wales are set to wake up to some mist and fog, but that will burn away pretty quickly in the morning with the strong sunshine.
"With temperatures usually around 10 to 13 Celsius at this time of year, it's certainly going to be significantly warmer than average this Easter weekend and quite a contrast to the colder weather we have seen so far this month".
He said: 'We have got high pressure moving at the moment giving most of the United Kingdom a lot of fine weather, this combined with the fact that the high pressure has dominated for the past few days is allowing the temperatures to heat and build'.
Temperatures hit 24.2C (75.6F) in Kinlochewe in the Highlands, 23.6C (74.4F) in Cardiff and 21.4C (70.5F) in Armagh.
Forecasts predict more mixed weather next week, but temperatures will remain higher than normal.