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Heavy rain in southwest WA

The southwestern tip of Western Australia is the latest corner of the country to see exceptionally heavy winter rainfall, with 24-hour totals topping 100mm at some locations.

Storms and heavy downpours pelted much of the South West Land Division on Wednesday as a cold front and associated low pressure system moved in from the Indian Ocean, with the most intense rainfall occurring in the late afternoon and early evening.

Skies were ablaze as the storms crossed the coastline, with more than 250,000 lightning strikes detected within 500km of Perth.

Image: Four-hour radar loop showing heavy falls and storms in southwest WA on Wednesday, July 2, 2025.

Rainfall totals were heaviest near the coast, and especially in the Margaret River region. Notable accumulations to 9am (AWST) included:

• 130mm at the Vasse Highway CB3 weather station just south of Busselton, with falls exceeding 100mm at two other nearby stations.
• 89.2mm at Busselton Airport, the heaviest rain day in any month in almost two years, and the heaviest July fall since the current site opened in 1998.
• 63mm at Bridgetown, the heaviest rain day in any month for four years in the inland town located approximately 100km southeast of Busselton.
• 40.6mm at Mandurah, the heaviest rain day to date in 2025 and the heaviest July rain day since 2019 for WA’s second most populous city.
• 18.8mm at Perth Airport.

The West Australian rain has cleared the far southwest of the state this Thursday morning, with the exception of a few very light showers, however bands of showers continue to dampen parts of the Wheatbelt, north and east of Perth.

Mostly clear skies will set in for a couple of days from this afternoon, before a classic winter pattern returns to the southwest later on Sunday as a strong cold front approaches.