Parts of southern, eastern and central England are also forecast to see maximum temperatures above 20C, according to the chart.
Some areas of Wales could see temperatures as high as 20C on this date, with maximum temperatures in Wales generally hovering around 16 to 19C.
Scotland could also see maximum temperatures of 18 to 19C, with a similar picture forecast for Northern Ireland.
WXCHARTS maximum temperature maps for Wednesday, August 11, suggest the warm weather will continue later next week, especially in England.