Flood Risk in Mount Tomah, NSW: 2026 Assessment

Mount Tomah, located in New South Wales, 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 New South Wales.

The area is subject to flash flooding during heavy rainfall events.

Mount Tomah faces a moderate risk of flooding, primarily from heavy rainfall events and potential overflow from local creeks and waterways. 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.

Mount Tomah sits within ClimateNest's suburb-level hazard model for flood risk. 12.9% of the suburb's land area is mapped in high-risk flood zones and 68.7% 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 Mount Tomah.

Mount Tomah (postcode 2758) 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 riverine flood (12.9% of land in high-risk zones), surface flood (10.5% of land in high-risk zones), bushfire (6.6% of land in high-risk zones). Exposure is not uniform across Mount Tomah — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.