Is St Marys, NSW Climate Safe? 2026 Assessment
Climate Safety Score
5.8/10Moderate climate risk — address-specific
Key Facts
- Climate Safety
- Medium
- Flood
- St Marys has a moderate risk of flooding due to its proximity to waterways and relatively flat terrain. Several properties are potentially exposed to flood events.
- Bushfire
- The bushfire risk in St Marys is moderate, with some areas bordering bushland. Increased temperatures and drier conditions can exacerbate this risk.
- Heat
- St Marys is expected to experience more frequent and intense heatwaves. This poses a significant risk to vulnerable populations.
- Storm
- Moderate storm risk — East Coast Lows bring severe weather including hail and damaging winds
- Postcode
- 2760
- Highest high-risk exposure
- 25.1% of land (bushfire)
Climate Safety Analysis
St Marys in New South Wales has an overall climate safety rating of Medium. This multi-hazard assessment combines flood, bushfire, heat, coastal, and storm risk data with climate projections to 2050 from CSIRO and the Bureau of Meteorology.
Key factors affecting St Marys's climate safety include heat, flood. Each hazard is assessed independently and combined for an overall picture. Australia has warmed by approximately 1.5 °C since 1910, with flow-on effects to fire weather, extreme rainfall, and heatwave frequency.
Climate safety for property in St Marys is not uniform — it varies by address. Factors such as elevation, distance to waterways, proximity to bushland, and local drainage all influence actual risk at a specific property. Two nearby properties can have materially different risk profiles.
For a complete property-specific climate safety report for St Marys including address-level hazard mapping, insurance outlook, and adaptation recommendations, use the ClimateNest full analysis tool.
St Marys (postcode 2760) 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 (25.1% of land in high-risk zones), surface flood (12.9% of land in high-risk zones), riverine flood (12.7% of land in high-risk zones). Exposure is not uniform across St Marys — 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
Historical Events
Significant rainfall led to flash flooding in low-lying areas of St Marys.
A prolonged heatwave resulted in increased hospital admissions and strain on infrastructure.
Bushfires in the surrounding areas threatened St Marys, requiring residents to be prepared for evacuation.
Heavy rainfall caused flooding in parts of St Marys, affecting residential and commercial properties.
Adaptation & Mitigation Actions
Improve stormwater drainage
Near-termUpgrade stormwater infrastructure to handle increased rainfall intensity and reduce flood risk.
Est. cost: Medium
Implement a heatwave management plan
ImmediateDevelop a plan to protect vulnerable populations during heatwaves, including cooling centers and community outreach programs.
Est. cost: Low
Bushfire preparedness
Near-termUndertake controlled burns and vegetation management to reduce bushfire risk. Educate residents on bushfire safety and evacuation procedures.
Est. cost: Medium
Promote water conservation
Long-termEncourage water conservation measures to reduce demand on water resources during droughts and heatwaves.
Est. cost: Low
Council & Emergency Services
Explore St Marys Risk Reports
View other climate risk assessments for St Marys:
Frequently Asked Questions
Is St Marys safe from climate change?
No location in Australia is entirely immune to climate change impacts. St Marys has an overall Medium climate risk rating. Understanding the specific hazards at your property address — not just the suburb average — provides the most reliable risk picture.
Which climate hazard poses the biggest risk in St Marys?
The dominant hazard for St Marys depends on geography and local environment. Proximity to waterways elevates flood risk, while proximity to bushland increases bushfire risk. ClimateNest's multi-hazard analysis identifies the highest-risk hazards for any specific address.
How does St Marys compare to nearby suburbs for climate safety?
Nearby suburbs may have different climate risk profiles depending on elevation, vegetation cover, drainage patterns, and land use. ClimateNest allows comparison of climate safety scores across New South Wales suburbs.
Should I be concerned about buying property in St Marys?
Climate risk should be one factor in your decision, alongside price, location, and amenity. An informed buyer understands the specific risks at a property address and factors insurance costs and climate projections into their assessment of long-term value.
What climate projections should I know for St Marys?
Key projections for New South Wales from CSIRO include increased average temperatures, more frequent hot days, changes in rainfall seasonality, longer fire seasons, and potential increases in extreme rainfall intensity. These trends inform the long-term outlook for St Marys.
What share of St Marys is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 25.1% of St Marys in high-risk zones for bushfire, with a further 68.2% 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 St Marys Safe from Climate Risk?
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