The Met Office weather forecast for the UK on Wednesday advises the day is likely to be largely unsettled.
Most areas across Britain will see a mixture of few sunny spells and showers or longer spells of rain.
The heaviest showers will tend to be over western Scotland, Wales and parts of the Midlands.
On Wednesday night, some torrential downpours will hit parts of Wales, Devon and Cornwall.
Some showers will impact other parts of England whilst Scotland and Northern Ireland become drier.
On Thursday, the weather is expected to be largely dry for Scotland, Northern Ireland and northwest England.
The best sunshine is expected over western parts in these regions.
Elsewhere, more unsettled with some showers again, especially over southern UK and windy weather is to be expected.
Most areas will continue to see rain and showers towards the weekend, which could turn thundery.
A brisk easterly wind easing later, generally warm away from the North Sea coast.
The Met Office long-range forecast for June 14 to June 23 forecasts the mixed weather to continue.
The forecast reads: “Dry on Sunday for many with sunny spells after any patchy fog clears.
“Northeastern parts, however, may see some rain or drizzle with scattered, perhaps heavy, showers in the west and southwest.
“The weather becomes rather mixed through the rest of the period with all parts seeing some drier and sunnier spells but with but the chance of showers developing.
“The showers may be heavy and merge into longer spells of rain at times with a risk of thunder also, although thunder mainly in southern or southwestern parts of the UK.
“Northwestern areas will likely see the best of any drier and sunnier conditions.
“Eastern coasts will often be cooler with mist here at the start of the period.
“Elsewhere though temperatures will be warm or very warm at times.”