Batten down the hatches.
Perth is set to cop up to 75mm of rain and damaging winds over the next three days.
The bureau is forecasting a very high chance of showers on Monday with the chance of a thunderstorm.
Damaging winds are also possible, the bureau has warned, with up to 25mm of rain predicted.
Tuesday does not sound much better. The bureau says more damaging winds and a thunderstorm are possible.
Winds could reach up to 60km/h.
On Wednesday up to 30mm of rain is forecast with heavy falls possible about the northern suburbs.
The good news is from Thursday onwards the rain and wind should ease somewhat but temperatures will still hover in the mid to high teens.
In a statement issued on Sunday the weather bureau said a severe weather warning had been issued with damaging winds and heavy rainfall potentially impacting Perth, Albany, Bunbury, Busselton, Katanning, Mandurah, Manjimup, Margaret River, Merredin, Moora, Mount Barker, Narrogin and Northam.
“The first front will cross the WA coast on Monday morning and the severe weather is expected to continue through to Wednesday night,” the statement said.
“This weather system is expected to be windier and longer lasting than a typical front and is likely to produce the kind of weather usually seen once a year.”
THE SIX DAY OUTLOOK
Monday-Showers. Becoming windy – Max 20C
Tuesday – Showers. Becoming windy – Max 17C
Wednesday-Showers. Becoming windy – Max 16C
Thursday – Showers easing – Max 17C
Friday – Shower or two – Max 16C
Saturday – Shower or two – Max 18C