Western parts of the UK will enjoy the best of the weather this Bank Holiday weekend, while most of the country will enjoy dry conditions on Monday.
Experts said London, the South East and East Anglia are likely to be hit with rain over Saturday and Sunday, so those looking for sunshine over the long weekend should go west.
Matt Dobson, a forecaster for MeteoGroup, the weather arm of the Press Association, said: "It's really an east-west split in the weather on Saturday, where west is definitely best.
"In England, Wales and Scotland there will be sunny spells and generally dry weather in western areas, whereas in eastern areas it will be cloudy with outbreaks of rain."
The forecaster said the warmest places will be from Devon and Cornwall, through Herefordshire, Worcestershire and Wales, and up into Cumbria and the western half of Scotland. Temperatures will reach highs of 20C (68F) or 21C (70F).
In Northern Ireland it will be a dry morning with some rain moving in over the afternoon.
"It's not looking brilliant for the South East on Sunday," Mr Dobson said.
"It's going to be wet and cloudy with a north easterly wind with further showers or heavier spells of rain."
Across to the west there will be sunshine again, with highs of 22C (72F) in some parts.
However, the expert said most of the country should be dry on Bank Holiday Monday.
"This is probably going to be the driest day for the whole weekend," he said.
"Much of the country, including the South East, is going to get away with better weather.
"The South West, Wales and Cumbria will be the best places."