Wet weekend: Heavy rain and a possible thunderstorm for Perth

Get your gumboots and umbrellas ready for a workout.

Up to 25mm of rain is forecast for Saturday as the weekend shapes up to be wet and wintry in Perth.

The Bureau of Meterology predicts heavy falls during the day and into the early evening, with winds up to 40km/h and a maximum of 20C.

Sunday, which will see a maximum temperature of 19C, will also see rainfall, most likely in the afternoon and evening with the southern suburbs possibly encountering a thunderstorm in the afternoon. Winds could hit 50km/h.

The bureau predicts the rest of the week will see showers for Perth, with maximum temperatures of about 20C.

So far this year 354.6mm has fallen, which is about average rainfall.

You've got a 50:50 chance of getting wet on the way home on Friday, with a medium chance of showers this evening.