Storm pounds Perth and southern WA amid warnings of more wet weather to come

Rottnest Island recorded winds gusts of 98 kilometres per hour, while the strongest winds tore through the South West, blowing at 104 kph at Cape Naturalist and 100 kph at Busselton Jetty.

Bureau of Meteorology (BOM) forecaster Mark Paul said the gusts were sustained.

"They have been blowing pretty much all night, but they will ease off as we head behind the [weather] band," he said.

The South West region also copped a drenching, with Margaret River recording 85.6 millimetres of rainfall between 9:00am yesterday and 4:00am this morning.

"With this storm event if you can do the best that you can to be self-sufficient that would be fantastic for us because our responders may be stretched as we go forward," he said.

"If you don't need to be outside or driving in a car, please stay inside and be in a secure place.

"There may be some localised flooding … if you don't need to be out at the height of the storm it just makes it a lot easier for emergency responders to deal with one less issue."