Heavy rain is due to return on Sunday after a month's worth of rain fell in a single day on Friday, forecasters say.
Saturday will see a brief return to sunnier conditions, before thundery showers set in, the Met Office said.
Travellers and holidaymakers faced delays on wet roads in areas on Friday, and downpours brought services at several London Tube stations to a halt.
A Met Office warning for wind and rain remains in place for south-east England until late morning.
Cloud is then expected to break providing drier, brighter conditions.
Tourists were prepared for the deluge on Westminster Bridge in London
Summer on hold: Stalls selling souvenirs pulled down the covers on Friday as a month's rain fell in a day
Temperatures could reach 21C (70F) in London, the high teens in the Midlands, and around 15C (59F) in Scotland and Northern Ireland.
Forecaster Alex Burkill said: "Most places should be dry by lunchtime today.
"It should be a much drier, brighter and much more pleasant day."
Thundery showers
Sunday will see conditions take a turn for the worse, although it is not expected to be as wet as Friday, Mr Burkill added.
"By the time most people wake up on Sunday morning it is going to be a rather cloudy day."
Most areas of the UK are expected to see between five and 10mm of rainfall, except for Northern Ireland, which is predicted to see as much as 30mm.
On one of the busiest "summer getaway" days of the year, travellers faced slippery driving conditions
Events were briefly suspended due to rain at the Diamond League athletics meeting at London's Olympic Stadium
Rain is expected to move eastwards throughout the day, with blustery and wet conditions set to last into early next week.
"Monday is looking pretty blustery with some heavy, thundery showers expected, but those should ease by the middle of the week," Mr Burkill said.
- Published6 July 2015
- Published1 July 2015
