A heatwave is poised to hit Britain this weekend with warm temperatures expected throughout June and July.

Temperatures are expected to hit the mid to high 20s on Saturday in the south and west of England and Wales.

A Met Office spokesman told the Daily Mail: “All parts should be fine and dry on Saturday with sunny spells, however it is expected to become rather cloudy in the north for the afternoon and evening.

“Temperatures in the south and west of England and Wales on Saturday are expected to reach the mid to high 20s Celsius, and in the north up to 20 Celsius.”

He added: “On Sunday we expect many parts to remain dry but to see rather cloudy skies, some sunshine in the south and west. The chance of some light drizzle here and there. Temperatures in the south are expected to reach 18 or 19 Celsius, and in the north around 15 to 17 Celsius.”

Rain is expected to be below average for the whole of June, particularly in the south, good news for Glastonbury, the Isle of Wight festival and Wimbledon.

The spokesman said: “Throughout the second half of June, rainfall amounts look likely to continue to be below average across many parts of the UK, especially in the south.

“However, the northwest may see closer to average rainfall. Sunshine amounts will be normal or slightly above, with temperatures for much of the country near normal, however possibly above average at times in southern and central parts of the UK.”