What the mapping shows for Grantville

  • Part of Grantville is mapped as subject to coastal inundation.

    0.3% of Grantville is mapped as subject to coastal inundation at current sea level

Victorian Coastal Inundation, State of Victoria (DEECA), CC BY 4.0, retrieved 2026-10-21

This is a share of the suburb's land area from a published state dataset, not an assessment of any property. A ClimateNest report scores the individual address across eight hazards, with insurance and value projections to 2050.

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📮 Grantville postcode: 3984

Heat Risk in Grantville, VIC: 2026 Assessment

Grantville, Victoria· Bass Coast Shire Council· 3984
Medium heat risk, with increasing frequency and intensity of heatwaves predicted.Updated 28 June 2026

0.3% of Grantville is mapped as subject to coastal inundation at current sea level

That figure covers the suburb. Check whether your address is inside it - address-level, sourced, A$49.

Free instant previewCSIRO-powered data

What A$49 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$49 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections

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Heat Risk Score

Not assessed

Medium heat risk, with increasing frequency and intensity of heatwaves predicted.

Key Facts

Heat Risk
Medium heat risk, with increasing frequency and intensity of heatwaves predicted.
Trend
increasing
Suburb
Grantville, VIC
Overall Risk
Medium
Postcode
3984
Region
Coastal VIC
Median property value
$725,000
Dominant hazard
damaging wind

Heat Risk Analysis

Grantville in Victoria faces location-specific 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 Grantville 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.

Temperatures are projected to increase, leading to more frequent and intense heatwaves.

Get an address-level heat risk assessment from ClimateNest for Grantville including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.

Heat risk in Grantville is tied to the broader Coastal VIC climate, and the number of days above 35°C is expected to grow through 2050 - a factor that affects cooling costs, garden viability and property desirability.

Grantville located in Coastal VIC (postcode 3984), is a Victoria suburb tracked by ClimateNest. The suburb's median property value is $725,000, and understanding climate exposure is becoming a standard part of due diligence for buyers, lenders and insurers pricing property in Grantville.

Across the six hazard axes ClimateNest models, the dominant climate risk for Grantville in this type is damaging wind. Insurance signals for the suburb point to premiums rising moderately (+25% by 2030). The actual risk of any single home can only be confirmed with an address-level report.

Whether you are buying, selling or renovating in Grantville, damaging wind 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 Grantville are increasingly made with an address-level climate report in hand.

Local Hazard Evidence

Avg January Max Temp26.5 °C
Heat Stress Events/Year5
Urban Heat ContextTemperatures are projected to increase, leading to more frequent and intense heatwaves.

Adaptation & Mitigation Actions

Coastal Defence and Dune Restoration

Immediate

Implement and maintain coastal defence structures (e.g., seawalls, revetments) and restore coastal dunes to mitigate erosion and inundation from sea level rise and storm surges.

Est. cost: $$$$

Bushfire Hazard Reduction Zones

Near-term

Establish and maintain strategic fuel reduction zones around the urban interface, particularly near bushland areas, through controlled burns and mechanical clearing.

Est. cost: $$$

Stormwater Management and Flood Mitigation

Near-term

Upgrade and maintain stormwater drainage systems, consider permeable paving in new developments, and investigate potential for localised flood retention basins.

Est. cost: $$

Urban Greening and Cool Refuges

Long-term

Increase tree canopy cover in public spaces and encourage green roofs/walls to reduce the urban heat island effect. Identify and establish public 'cool refuge' centres for extreme heat events.

Est. cost: $$

Community Bushfire Preparedness Program

Immediate

Enhance community engagement and education on bushfire preparedness, including Neighbourhood Safer Places and individual Bushfire Survival Plans.

Est. cost: $

Council & Emergency Services

Bass Coast Shire Council
Emergency Services

Data last updated: 28 June 2026

Explore Grantville Risk Reports

Frequently Asked Questions

How hot does Grantville get in summer?

Grantville in Victoria experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near Grantville. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.

Is extreme heat increasing in Grantville?

Australia-wide, extreme heat events have become more frequent since the mid-20th century, and this trend is consistent with CSIRO climate projections for Victoria. Continued warming is likely through 2050 under all emissions scenarios.

How does heat affect energy costs for Grantville 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 Grantville and the performance of your building envelope.

What heat mitigation measures work best in Grantville?

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.

Is Grantville Safe from Climate Risk?

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

Free instant previewCSIRO-powered data

What A$49 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$49 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections