Flood Risk in South Perth, WA: 2026 Assessment

South Perth, located in Western Australia, has a notable flood risk profile based on available data including proximity to waterways, elevation, and historical flood events. The Bureau of Meteorology (BOM) maintains river height and flood warning data for catchments across Western Australia.

Historical flood events have impacted properties along the riverfront. Improved drainage infrastructure is needed to mitigate future risks.

South Perth faces a moderate risk of flooding, primarily from riverine sources and intense rainfall events. The Swan River poses a constant threat, and localized flooding can occur due to inadequate drainage.

For a comprehensive property-specific flood assessment including address-level elevation data, flood overlay mapping, and insurance cost estimates, use the ClimateNest full analysis tool. General suburb data cannot replace a site-specific evaluation.

South Perth sits within ClimateNest's suburb-level hazard model for flood risk. 6.9% of the suburb's land area is mapped in high-risk flood zones and 64.5% in moderate-risk zones, based on the national hazard overlay. Exposure at this scale varies street by street, which is why an address-level check matters before you buy or insure a specific property in South Perth.

South Perth (postcode 6151) is tracked in ClimateNest's suburb hazard model, which maps the share of the suburb's land exposed to each hazard at high and moderate levels. The suburb's highest high-risk exposures are bushfire (12% of land in high-risk zones), riverine flood (6.9% of land in high-risk zones), surface flood (6.4% of land in high-risk zones). Exposure is not uniform across South Perth — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.