Friday
An active front will bring cloud and outbreaks of rain to Ireland, Northern Ireland, Scotland and parts of northern England on Friday. Elsewhere, it will be largely dry with sunny spells and very warm, humid conditions, although a few showers are possible across far southern England during the morning. Rain will gradually spread southwards into Wales and northern England, with some heavy bursts possible across the Borders and southern Scotland. Brighter conditions with sunny spells will develop across northwest Scotland and western Ireland, while much of England remains dry and sunny. Temperatures will reach 31°C in southeast England, with highs of 20â�'27°C more widely, but a cooler 17â�'20°C in western areas.

Friday Night
Overnight, outbreaks of rain will continue to affect parts of Scotland, northern England, Wales and Northern Ireland. Staying largely dry across Ireland as well as central and southern England. Humid across central and southern England and Wales with lows here at 14 to 18C, relatively fresher further north and west with lows around 8 to 12C.
 

Saturday
Any patchy rain and drizzle across northern and western areas on Saturday morning will gradually clear. As high pressure builds, most places will enjoy a dry and pleasant afternoon with sunny spells, although southern areas may remain cloudier at times. It will be another hot day in the southeast, with temperatures reaching 28C. Elsewhere, highs of 19 to 25C are expected across much of the country.

Sunday
High pressure sits over the country on Sunday allowing for a largely dry and fine day. Possible cloudier skies across England and Wales through the morning but sunshine is expected to develop widely as the day progresses. A weak front could bring thicker cloud and patchy rain into far western counties of Ireland into Northern Ireland later. Highs to 29C in the southern English counties, 22 to 27C more widely, 17C across western Scotland.