
The weather agency has predicted sweltering temperatures approaching 30C in some parts of the country this weekend, but forecasts also suggest some parts of the country will see unsettled conditions.
Maps show rain hitting across most of Scotland on Sunday, while parts of northern England also get a drenching.
Every county in Scotland, with the exception of Moray and Aberdeenshire, is forecast to see rain, the maps suggest.
As for England, the downpour looks set to hit all of northern England from the border with Scotland down to Lancashire, and just missing Greater Manchester.
Northern Ireland could see some light rain while southern England and Wales are spared.
You can see the Met Office's rain forecast on the map below.
The Met Office has also forecast potential heatwave conditions in the South-east of England this weekend.
Forecasters are predicting highs above 30C for London heading into next week.
Temperatures are expected to hit 28C in London on Saturday before rising to 32C on Monday.
This comes after a record-breaking June heatwave, which saw the mercury soar to 37.7 °C in Norfolk - the hottest June day on record.
Professor Stephen Belcher, Met Office chief scientist, said: “Human-induced climate change has made events like this more likely and more intense.
“To see temperatures like this in the UK in June is sobering.
“Events like this bring home the implications of climate change, with very high temperatures and humidity bringing significant health implications from heat stress, as well as impacts to a range of sectors such as transport, energy and water supply.”