Thursday
Another roaster, with sunshine widely, some thin high level cloud, mainly in the west. Thicker cloud for Scotland, areas of rain for the Highlands, some thundery. Low risk a thundery shower western England and Wales. A few showers bubble up later in the north of Ireland too. A strengthening and gusty east to southeasterly wind. Fog may linger along North Sea coast, keeping the immediate coast considerably cooler than inland, only near 18C. Meanwhile, inland will rise widely above 30C, topping 36C in central-southern counties, and some peak values may also occur to the west of hills in Wales, the Midlands and Cheshire. Around 30C in Ireland and southern Scotland, 22 to 25C northern Scotland.

Thursday Night
Rain continues in north and west Scotland, torrential falls probable with some thunderstorms developing too. This band of rain likely stretches into northern parts of Ireland, where thunder may occur too. Further south, the night starts dry with clear skies, but the later hours bring a risk of thundery showers more widely across Scotland, and later in the south of Wales and England too. The southern showers likely stay well-scattered until the later hours, and many areas of England and Wales stay entirely dry. A tropical night with lows in southern England locally to 24, some areas nearer 20C; 13 to 15C in Scotland.

Friday
Scattered thunderstorms from before dawn in some parts of Wales and central-western England. Also some areas of rain for western Scotland and the west of Ireland, some heavy and possibly thundery. As the day goes on, a greater risk of torrential thunderstorms for northern England, central and western Scotland, and north Ireland. Localised thundery showers further south, but much of southern England and Wales sees a dry and sunnier afternoon, remaining very hot and humid in the east. Highs 32 to 36C in central and eastern England, 25 to 28C further north and west across Britain and Ireland, whilst central-northeastern Scotland will be nearer 17 to 20C.

Saturday
Low pressure to the west brings showery rain and some thundery bursts to Ireland from before dawn, frequent areas of heavy rain moving into Northern Ireland and Scotland in the morning. Some patchy rain affects western coasts of England and Wales for much of the day, then isolated thundery showers forming over England and Wales later afternoon. Variable cloud and sunny spells here. Southwesterly breezes strongest in northern areas. Less humid, but still rising to 31C in southeastern England. 26 to 28C for the Midlands, 19 to 22C for west and northwestern Britain and much of Ireland, nearer 15C western Scotland.