Flood Risk in Marys Mount, NSW: 2026 Assessment

Marys Mount, New South Wales· UNKNOWN
Flooding may occur due to heavy rainfall and proximity to waterways. Climate change is expected to increase the intensity of rainfall events.Updated 9 May 2026

Flood Risk Score

4.0/10

Flooding may occur due to heavy rainfall and proximity to waterways. Climate change is expected to increase the intensity of rainfall events.

Key Facts

Flood Risk
Flooding may occur due to heavy rainfall and proximity to waterways. Climate change is expected to increase the intensity of rainfall events.
Trend
increasing
Suburb
Marys Mount, NSW
Overall Risk
Medium
Postcode
2380
Highest high-risk exposure
12.2% of land (surface flood)

Flood Risk Analysis

Marys Mount, 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.

Historical flood data indicates potential for inundation in low-lying areas.

Flooding may occur due to heavy rainfall and proximity to waterways. Climate change is expected to increase the intensity of rainfall events.

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.

Marys Mount sits within ClimateNest's suburb-level hazard model for flood risk. 4.3% of the suburb's land area is mapped in high-risk flood zones and 69.7% 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 Marys Mount.

Marys Mount (postcode 2380) 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 (12.2% of land in high-risk zones), bushfire (9.7% of land in high-risk zones), riverine flood (4.3% of land in high-risk zones). Exposure is not uniform across Marys Mount — 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 WaterwayNepean River
Elevation Range300-350m
Flood Zone ClassificationPotentially affected areas near the Nepean River

Historical Events

2011
Moderate

Heavy rainfall caused flooding along the Nepean River, affecting low-lying areas.

Adaptation & Mitigation Actions

Develop a Bushfire Survival Plan

Immediate

Create a detailed plan for evacuating your property in the event of a bushfire, including designated escape routes and emergency supplies.

Est. cost: Low

Improve Home Cooling

Near-term

Install air conditioning or fans to help keep your home cool during heatwaves. Consider energy-efficient options to reduce electricity consumption.

Est. cost: Medium

Upgrade Home Insulation

Near-term

Improve insulation in your roof and walls to reduce heat gain during summer and heat loss during winter.

Est. cost: Medium

Install Rainwater Tanks

Long-term

Collect rainwater for use in gardens and toilets to reduce reliance on mains water and mitigate flood risk.

Est. cost: Medium

Council & Emergency Services

Penrith City Council
Emergency Services

Data last updated: 9 May 2026

Explore Marys Mount Risk Reports

Frequently Asked Questions

Is Marys Mount at risk of flooding?

Based on available data, Marys Mount 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 Marys Mount?

Insurance costs for flood cover in Marys Mount 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 Marys Mount?

Yes, flood risk can affect property values in Marys Mount. 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 Marys Mount?

Elevation is a critical factor in flood risk. Properties at higher elevations within Marys Mount 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 Marys Mount is exposed to high surface flood risk?

ClimateNest's hazard overlay maps 12.2% of Marys Mount in high-risk zones for surface flood, with a further 65.4% 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 Marys Mount Safe from Climate Risk?

Enter your address below for an instant climate risk assessment for Marys Mount, New South Wales, 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