Flood Risk in Semaphore Park, SA: 2026 Assessment

Semaphore Park, 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.

Semaphore Park's low-lying topography makes it susceptible to both riverine and coastal flooding. Historical flood events have impacted residential and commercial properties.

Semaphore Park is at moderate risk of flooding due to its low elevation and proximity to the coast and waterways. Heavy rainfall events can lead to stormwater flooding, and sea level rise increases the risk of coastal inundation.

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.

Semaphore Park sits within ClimateNest's suburb-level hazard model for flood risk. 1.7% of the suburb's land area is mapped in high-risk flood zones and 75.7% 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 Semaphore Park.

Semaphore Park (postcode 5019) 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 (11.1% of land in high-risk zones), bushfire (10.8% of land in high-risk zones), extreme wind (4.2% of land in high-risk zones). Exposure is not uniform across Semaphore Park — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.