Flood Risk in Cornwallis, TAS: 2026 Assessment

Cornwallis, located in Tasmania, 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 Tasmania.

The Hawkesbury-Nepean Valley is one of the largest concentrated floodplains in NSW.

Cornwallis is highly susceptible to flooding due to its location on the Hawkesbury River floodplain. The risk is projected to increase with climate change.

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.

Cornwallis sits within ClimateNest's suburb-level hazard model for flood risk. 7.4% of the suburb's land area is mapped in high-risk flood zones and 66.3% 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 Cornwallis.

Cornwallis (postcode 7215) 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 extreme wind (10.5% of land in high-risk zones), riverine flood (7.4% of land in high-risk zones), bushfire (4.7% of land in high-risk zones). Exposure is not uniform across Cornwallis — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.