A wild start to the week for southwest WA

After a period of calmer weather following the low pressure system that battered much of the southwest WA coast on June 1st, WA is set to experience another couple of days of strong winds, heavy rain and thunderstorms as a cold front impacts the region on Monday and Tuesday. 

A passing cold front will bring strong winds, heavy rain and thunderstorms for much of southeast WA.
Image: Synoptic chart for Tuesday, June 9, 2026, showing the low pressure system and associated cold front crossing southwest WA, along with associated precipitation. Source: Weatherzone.  

Wind gusts associated with this system are expected to be strong and may become locally damaging in exposed coastal areas. Closer to the Perth CBD, gusts are currently forecast to reach 60–80 km/h.  

Frequent showers and extensive cloud cover will accompany the front across the southwest, causing maximum temperatures to fall to around 16°C in Perth and 14°C in Bunbury - approximately 4°C below the June average. Combined with the strong gusty SW winds, wind chill will be significant on Tuesday, making conditions feel 5–7°C colder than the actual air temperature. 

 

Image: Forecast wind gusts at 2am (AWST) on Tuesday, June 9, 2026. Source: Weatherzone  

A cooler, unstable air mass accompanying the cold front is likely to trigger thunderstorms and rain (most likely heaviest north of Perth), with strong, dry winds aloft potentially supporting small-to-medium hail from tomorrow afternoon to Tuesday morning. Thunderstorms may also produce locally heavy downpours, wind gusts stronger than those forecast outside of storms, and potentially isolated cold-season tornadoes.

Residents of southwest WA are encouraged to keep up to date with the latest weather warnings here.