In an unseasonal twist, the mercury is expected to climb to 35C in Perth today and into the low 30s on the weekend.
Saturday’s forecast is a maximum of 31C and on Sunday a maximum 32C.
Weather bureau duty forecaster Mervyn Blackwell said the warm spike was due to a high pressure system in the Great Australian Bight.
“We have got a high in the bight and we have east north east winds, so we have warmer conditions,” he said.
“We are going to 35 today and low 30s over next couple of days and we have a cool change on Tuesday and Wednesday.”
He said the cool change next week would come as a weak front brushed the south coast and brought cool southerly winds.
The bureau is forecasting a slight chance of rain late next week.
The national rainfall outlook for April to June is a good chance of above average rains for the South West corner.