Flood Risk in Port MacDonnell, SA: 2026 Assessment

Port MacDonnell, 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 coastal areas are most vulnerable to flooding.

Port MacDonnell faces a moderate risk of flooding, primarily from heavy rainfall and coastal inundation. The flat coastal terrain and proximity to the ocean increase vulnerability.

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 MacDonnell sits within ClimateNest's suburb-level hazard model for flood risk. 1.9% of the suburb's land area is mapped in high-risk flood zones and 72.7% 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 MacDonnell.

Port MacDonnell (postcode 5291) 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 surface flood (8.3% of land in high-risk zones), bushfire (8.1% of land in high-risk zones), extreme wind (3.9% of land in high-risk zones). Exposure is not uniform across Port MacDonnell — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.