Heat Risk in South Granville, NSW: 2026 Assessment
Heat Risk Score
7.0/10South Granville experiences a high risk of heatwaves, particularly during the summer months. Urban density and limited green spaces contribute to the urban heat island effect.
Key Facts
- Heat Risk
- South Granville experiences a high risk of heatwaves, particularly during the summer months. Urban density and limited green spaces contribute to the urban heat island effect.
- Trend
- increasing
- Suburb
- South Granville, NSW
- Overall Risk
- Medium
- Postcode
- 2142
- Highest high-risk exposure
- 13.9% of land (bushfire)
Heat Risk Analysis
South Granville in New South Wales faces elevated extreme heat risk. The Bureau of Meteorology (BOM) reports that Australia's average temperature has increased by approximately 1.5 °C since 1910, with the frequency of extreme heat days rising across most regions.
The urban heat island (UHI) effect can make built-up areas of South Granville warmer than surrounding rural areas, particularly on summer nights. Dark roof materials, limited tree canopy cover, and heat-absorbing surfaces contribute to localised heat stress that varies by property.
The Bureau of Meteorology data shows an increasing trend in the number of days exceeding 35 degrees Celsius. The urban heat island effect exacerbates these conditions.
Get an address-level heat risk assessment from ClimateNest for South Granville including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.
South Granville (postcode 2142) 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 (13.9% of land in high-risk zones), riverine flood (13% of land in high-risk zones), surface flood (8.8% of land in high-risk zones). Exposure is not uniform across South Granville — 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
Prolonged heatwave conditions affected Sydney, with temperatures exceeding 40 degrees Celsius for several consecutive days.
Adaptation & Mitigation Actions
Improve Drainage Infrastructure
ImmediateUpgrade and expand drainage systems to manage increased rainfall and reduce flood risk.
Est. cost: High
Increase Green Spaces
Near-termPlant more trees and create green spaces to reduce the urban heat island effect and provide shade.
Est. cost: Medium
Implement Heat Mitigation Measures
Near-termPromote cool roofs, reflective pavements, and other measures to reduce surface temperatures.
Est. cost: Medium
Develop Flood Early Warning Systems
ImmediateEstablish a comprehensive flood early warning system to alert residents and businesses of impending flood events.
Est. cost: Medium
Community Education Programs
Long-termEducate residents about climate risks and adaptation strategies through workshops and outreach programs.
Est. cost: Low
Council & Emergency Services
Explore South Granville Risk Reports
View other climate risk assessments for South Granville:
Frequently Asked Questions
How hot does South Granville get in summer?
South Granville in New South Wales experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near South Granville. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.
Is extreme heat increasing in South Granville?
Australia-wide, extreme heat events have become more frequent since the mid-20th century, and this trend is consistent with CSIRO climate projections for New South Wales. Continued warming is likely through 2050 under all emissions scenarios.
How does heat affect energy costs for South Granville properties?
Higher temperatures increase cooling demand, which raises electricity costs. ClimateNest provides energy cost projections based on your property's specific exposure to extreme heat days in South Granville and the performance of your building envelope.
What heat mitigation measures work best in South Granville?
Effective heat mitigation includes light-coloured roofing (cool roofs), ceiling and wall insulation, double-glazed windows, external shading, cross-ventilation design, and increasing tree canopy around the property. These measures reduce indoor temperatures and cooling costs.
What share of South Granville is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 13.9% of South Granville in high-risk zones for bushfire, with a further 69.1% 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 South Granville Safe from Climate Risk?
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