Temperatures on Saturday will begin to climb above average again, reaching the mid- to high 20s Celsius in most of England and Wales.
It will be cooler in Scotland and Northern Ireland at 17 to 21C with more cloud, a bit of rain and a blustery wind.
By Sunday and into next week temperatures will rise even further with many parts of the UK exceeding their heatwave threshold temperature of 25 to 28C, depending on location.
With this hotter weather expected to last well into the week, many locations will have the three consecutive days needed to declare the fifth widespread heatwave of the year.
It has already been a remarkable summer in the United Kingdom with multiple records broken.
July has been the sunniest month on record for the UK, as well as the driest July on record for England and Wales.
There have so far been 33 days this year when temperatures have exceeded 30C in the UK. Next week, it is likely the record of 34 days, set in 1995, will be broken.
For the first time ever, a temperature of 35C has also been recorded somewhere in the UK on the three consecutive months of May, June and July.
It is possible August will join that list by the end of next week as some forecast models suggest 35C in central and south-east England.
