Flood Risk in Dumaresq Island, NSW: 2026 Assessment

Dumaresq Island, 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 island is largely within a designated flood zone, with some areas being particularly vulnerable to inundation during heavy rainfall events.

Dumaresq Island is susceptible to flooding due to its low-lying geography and proximity to the Manning River. Increased rainfall intensity and rising sea levels are expected to exacerbate flood 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.

Dumaresq Island sits within ClimateNest's suburb-level hazard model for flood risk. 4.7% of the suburb's land area is mapped in high-risk flood zones and 72.2% 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 Dumaresq Island.

On ClimateNest's 0–10 suburb hazard index, Dumaresq Island scores 4 for flood risk — a moderate exposure relative to the Australian suburb range. For comparison, properties in Dumaresq Island can still sit well above or below this suburb average depending on elevation, distance to waterways or vegetation, and local drainage.

Dumaresq Island located in Coastal NSW (postcode 2430), is a New South Wales suburb tracked by ClimateNest. The suburb's median property value is $925,000, and understanding climate exposure is becoming a standard part of due diligence for buyers, lenders and insurers pricing property in Dumaresq Island.

Across the six hazard axes ClimateNest models, the dominant climate risk in Dumaresq Island is extreme heat (score 5/10), with moderate exposure. Insurance signals for the suburb point to premiums rising moderately (+30% by 2030). These suburb-level signals help prioritise which properties need the closest look — the actual risk of any single home can only be confirmed with an address-level report.

Whether you are buying, selling or renovating in Dumaresq Island, extreme heat is the hazard to weigh first. Local council planning controls, state hazard mapping and lender climate policies each reference this kind of suburb-level signal, and property decisions in Dumaresq Island are increasingly made with an address-level climate report in hand.