Flood Risk in Nannup, WA: 2026 Assessment

Nannup, 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 data indicates that the Blackwood River has a history of flooding in Nannup, particularly after heavy rainfall events.

Nannup faces a moderate risk of flooding due to its proximity to the Blackwood River and other waterways. Heavy rainfall events can lead to riverine flooding, impacting low-lying areas and infrastructure.

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.

Nannup sits within ClimateNest's suburb-level hazard model for flood risk. 4.1% of the suburb's land area is mapped in high-risk flood zones and 88.1% 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 Nannup.

Nannup (postcode 6275) 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 (17.6% of land in high-risk zones), surface flood (7.7% of land in high-risk zones), tropical cyclone (5.9% of land in high-risk zones). Exposure is not uniform across Nannup — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.