Thursday
Showery rain moves into northern England and southern Scotland in the early hours. A few spots of rain further south in the east of England as well. Largely dry elsewhere, plenty of sunshine across Britain, particularly central England and Scotland. From noon and into afternoon, a veil of broken high cloud spreads across Ireland, Wales, and the south of England, gradually pushing north into Scotland through later afternoon. Some patchy rain will draw into Wales. Later, some heavy showers in northwest Scotland. Highs at 30C in southeast England, 23C in Scotland and Ireland.

Thursday Night
The wind turns southwesterly and strengthens for most; with this Atlantic flow, more cloud around in general, particularly western coasts of Scotland and Wales. Cloud breaks always best in the east. Some drizzly rain affecting western parts of Cumbria and Scotland as well, the rain at times patchier and heavier in the west Highlands. For England and Ireland, largely dry with a mix of cloud and clear sky. Lows of 12 to 13C for many, nearer 15C central England, as high as 18C southeast.

Friday
A ridge of high pressure gradually builds back across the country on Friday. Probably more cloud around in the morning, although this breaks with sunny spells, more widely sunny in the later afternoon. A risk of a few showers in northwest Scotland where the cloud will be thicker and unlikely clear; also a notable westerly breeze here. Temperatures starting to cool, towards 18 to 20C Ireland and east Scotland (locally 16C west Scotland), 23C central England, and still up towards 29C southeast England.

Saturday
Saturday starts sunny in England and Wales under a ridge of high pressure from overnight. In Ireland, pressure begins dropping from overnight, increasingly rainy from the west through the morning. Showery rain fairly widely across Ireland by the afternoon, some showers approaching west Scotland too. Some scattered showers reach Wales and northern England later too. Highs at 28C southeast England, 20C in Ireland, 18C eastern Scotland, to 16C west Scotland.