Flood Risk in Henley Beach, SA: 2026 Assessment

Henley Beach, 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.

The Patawalonga River is prone to flooding during heavy rainfall events. The council has implemented some flood mitigation measures, but further investment is needed.

Henley Beach faces a moderate risk of flooding due to its low-lying coastal location and proximity to the Patawalonga River. Increased rainfall intensity could exacerbate this risk.

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.

Henley Beach 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 69.1% 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 Henley Beach.

Henley Beach (postcode 5022) 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 (15.5% of land in high-risk zones), surface flood (6% of land in high-risk zones), riverine flood (4.1% of land in high-risk zones). Exposure is not uniform across Henley Beach — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.