The mercury has reached 30C in Prestwick beating previous heatwaves earlier in the year.
The Met Office has issued a yellow warning from 1.30pm on Tuesday until 6am on Wednesday.
The heatwave comes as lockdown restrictions ease allowing people to go outdoors and enjoy the sunshine.
The central belt, Moray coast and the north Highlands will be hit with 25 -27C weather on Friday and Saturday.
