Flood Risk in Lower Mangrove, NSW: 2026 Assessment

Lower Mangrove, 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 Hawkesbury River is prone to significant flooding during heavy rainfall events. Historical flood data indicates that Lower Mangrove has been impacted by major floods in the past.

Lower Mangrove is at high risk of flooding due to its location near the Hawkesbury River and surrounding waterways. Heavy rainfall events can lead to significant riverine and flash flooding.

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.

Lower Mangrove sits within ClimateNest's suburb-level hazard model for flood risk. 10.6% of the suburb's land area is mapped in high-risk flood zones and 78.5% 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 Lower Mangrove.

Lower Mangrove (postcode 2250) 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 (13% of land in high-risk zones), surface flood (12.5% of land in high-risk zones), riverine flood (10.6% of land in high-risk zones). Exposure is not uniform across Lower Mangrove — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.