Flood Risk in Port Augusta, SA: 2026 Assessment

Port Augusta, located in South 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 South Australia.

Low-lying areas near the coast are particularly vulnerable to tidal and storm surge flooding.

Port Augusta faces a moderate risk of flooding due to its location near Spencer Gulf and the occasional heavy rainfall events. The risk is exacerbated by low-lying areas within the suburb.

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.

Port Augusta sits within ClimateNest's suburb-level hazard model for flood risk. 2.3% of the suburb's land area is mapped in high-risk flood zones and 71% 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 Port Augusta.

Port Augusta (postcode 5700) 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 (7.6% of land in high-risk zones), surface flood (6.9% of land in high-risk zones), extreme wind (3.7% of land in high-risk zones). Exposure is not uniform across Port Augusta — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.