Tuesday
A warm and humid start to the day and turning into a scorcher as the temperatures rise and humidity rises, particularly for southern and central areas of England. A shower risk first thing across northern England, but mainly a dry day with strong sun and thin high cloud. Highs toward 36C in the Home Counties and London area. Nearer 24C in Cumbria, Scotland and northern Ireland, local 26C east Scotland.

Tuesday night
A mainly dry night to be expected, though cloud thickens across western Irleand where the odd spot of light rain is possible through the early hours on Wednesday. Across central and southern England it will be tropical with lows struggling to drop below 20C or 21C. Further north and west lows less warm at 12 to 18C.
 

Wednesday
Exceptionally hot and humid across central and southern England and Wales. Widespread strong sunshine for most. Low cloud and fog around the northwest of Ireland and western Scotland where it will be much cooler, some drizzle locally. Easterly breezes for the south of England, strongest along Channel coasts. Light winds further north. Top temperatures reaching 29 to 33C widely for much of England and Wales, up to 35 or 36C in southern counties. 24 to 28C for Ireland and the far north of England. 22 to 25C Scotland and Northern Ireland, but only 16C if foggy in the northwest.

Thursday
Strong southeasterly winds extend across the country, pushing a waft of hot and humid air further northwards for another exceptional day in many places. Largely sunny with some thin high cloud around. Some misty low cloud again for northwest Scotland, locally also possible coastal fog in northeast England. A risk of thundery rain developing for western Scotland and northwest Ireland. Another humid day. Top temperatures climbing above 30C for many places up to southern Scotland, 33 to 37C in central and southern England. Cooler along North Sea coasts. 25C inland for northern Scotland, cooler northwest Scotland.