The final weekend of the Australian summer looks set to be an absolute scorcher for Perth, with a hot and sunny day expected on Saturday as the mercury rises to 40 degrees.

The Bureau of Meteorology is forecasting a zero per cent chance of rain and says there will be winds easterly 15 to 25 km/h tending northeasterly in the morning then becoming light in the middle of the day.

That's perfect for boating, fishing, hitting the beach, swimming to Rotto, enjoying a picnic, catching the cricket, attending the Perth Writer's Festival or doing any of the other things we'd like to have done over the last three months but couldn't because the weather sucked.