Flood Risk in Wonnangatta, VIC: 2026 Assessment

Wonnangatta, Victoria· Alpine
Wonnangatta faces a moderate risk of flooding due to its location near waterways and potential for heavy rainfall. Climate change is expected to increase the frequency and intensity of extreme rainfall events, exacerbating flood risk.Updated 31 May 2026

Flood Risk Score

6.5/10

Wonnangatta faces a moderate risk of flooding due to its location near waterways and potential for heavy rainfall. Climate change is expected to increase the frequency and intensity of extreme rainfall events, exacerbating flood risk.

Key Facts

Flood Risk
Wonnangatta faces a moderate risk of flooding due to its location near waterways and potential for heavy rainfall. Climate change is expected to increase the frequency and intensity of extreme rainfall events, exacerbating flood risk.
Trend
increasing
Suburb
Wonnangatta, VIC
Overall Risk
High
Postcode
3737
Highest high-risk exposure
8% of land (surface flood)

Flood Risk Analysis

Wonnangatta, located in Victoria, 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 Victoria.

Historical records indicate several major flood events in the Wonnangatta Valley.

Wonnangatta faces a moderate risk of flooding due to its location near waterways and potential for heavy rainfall. Climate change is expected to increase the frequency and intensity of extreme rainfall events, exacerbating 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.

Wonnangatta sits within ClimateNest's suburb-level hazard model for flood risk. 3% of the suburb's land area is mapped in high-risk flood zones and 87% 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 Wonnangatta.

Wonnangatta (postcode 3737) 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 (8% of land in high-risk zones), bushfire (7.9% of land in high-risk zones), extreme wind (3.3% of land in high-risk zones). Exposure is not uniform across Wonnangatta — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.

Local Hazard Evidence

Nearest WaterwayWonnangatta River
Elevation Range600-1800m
Flood Zone ClassificationAreas adjacent to the Wonnangatta River are susceptible to flooding.

Historical Events

2007
Moderate

Heavy rainfall caused significant flooding in the Wonnangatta Valley, damaging roads and infrastructure.

Adaptation & Mitigation Actions

Improve Bushfire Preparedness

Immediate

Develop and implement comprehensive bushfire management plans, including fuel reduction, community education, and evacuation strategies.

Est. cost: High

Strengthen Flood Defenses

Near-term

Invest in flood mitigation infrastructure, such as levees and drainage systems, to protect properties and infrastructure from flooding.

Est. cost: High

Enhance Heatwave Response

Near-term

Develop and implement heatwave early warning systems and public health campaigns to protect vulnerable populations from heat stress.

Est. cost: Medium

Promote Water Conservation

Long-term

Implement water conservation measures to reduce demand for water resources during periods of drought and heat.

Est. cost: Low

Council & Emergency Services

Alpine Shire Council
Emergency Services

Data last updated: 31 May 2026

Explore Wonnangatta Risk Reports

Frequently Asked Questions

Is Wonnangatta at risk of flooding?

Based on available data, Wonnangatta has a notable flood risk profile. Flood risk varies by address — check your specific property for precise flood zone mapping and elevation data with ClimateNest.

What flood insurance costs can I expect in Wonnangatta?

Insurance costs for flood cover in Wonnangatta depend on the property's flood zone classification, elevation, and proximity to waterways. ClimateNest provides address-level insurance cost estimates based on your property's specific hazard exposure.

Does flood risk affect property values in Wonnangatta?

Yes, flood risk can affect property values in Wonnangatta. Properties in mapped flood zones may experience lower buyer demand, reduced valuations, and higher insurance costs. Lenders increasingly assess flood exposure as part of mortgage risk evaluation.

How does elevation affect flood risk in Wonnangatta?

Elevation is a critical factor in flood risk. Properties at higher elevations within Wonnangatta typically have lower flood exposure than those near waterways or in low-lying areas. Address-level elevation data combined with BOM flood mapping provides the most accurate picture.

What share of Wonnangatta is exposed to high surface flood risk?

ClimateNest's hazard overlay maps 8% of Wonnangatta in high-risk zones for surface flood, with a further 71.2% in moderate-risk zones. Suburb-level exposure is not uniform — individual properties can differ from these averages, so an address-level check is recommended.

Is Wonnangatta Safe from Climate Risk?

Enter your address below for an instant climate risk assessment for Wonnangatta, Victoria, covering flood, bushfire, sea level rise and more.

Free instant previewCSIRO-powered data

What A$69 could save you from

$7.2B
2022 insured disaster losses*
$300B+
climate risk to property by 2050*
30-120%
insurance premium increases in high-risk areas*

*Industry sources: ICA, APRA, RBA

Full report from A$69 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections