Friday
Cloudier start on Friday across southeast England and in the north of Scotland, while elsewhere sees sunny spells. A few spots of rain expected across northwestern parts of Ireland, drizzly over the west Scottish mountains. With time, spots of rain will turn into more persistent rain across northern parts of Scotland, with patches spreading further across Scotland and into Ireland as evening turns to night. Cloud becomes fairly extensive across northern areas too, fair weather cloud building in southern England. Highs at 15C to 20C across Scotland, mildest east; 18 to 24C across northern England and Ireland, approaching 30C in southern England and east Wales.

Friday Night
Rain sets in rather persistently across northwest Scotland overnight as a westerly breeze strengthens. A few showers breaking out across parts of Ireland and Scotland, but very local in nature. In the later overnight hours, wind becomes quite strong in north Scotland with a risk of gales and heavy rain onto the coast, patchy rain increasingly widespread across Scotland and Ireland. England and Wales stay dry with mostly clear skies. Lows of 11 to 14C.

Saturday
On Saturday, an Atlantic front will sweep south and east through the country. Patchy rain in the morning across most of Ireland and Scotland, some heavier persistent falls in coastal areas. Patchy rain and cloud will sweep into Wales and England as well, most rain again in northwestern areas; becoming widely windy as well. Southeast England stays driest with some sunny spells. With time, some sunny spells may break out in Scotland and Ireland after the passing of the front, but always with a risk of showers returning. Highs of 17 to 22C Scotland and Ireland, to 29C southeast England.

Sunday
Sunday sees showers across most regions throughout the day. Sunny spells here and there between showers. With time, pressure will rise over Ireland, pushing the showers into just northern areas and into Britain. There could be some heavy showery outbreaks in eastern Britain in the afternoon as some sea breezes form here. Showers ease into evening, clear skies breaking out for many around sunset, but northwestern coastal areas of Wales, Ireland, and Scotland will hold onto some cloud and light drizzle. Highs 17 to 27C.