High Climate Risk Postcodes Australia
Flood, bushfire and coastal erosion are not evenly distributed across Australia. These are the postcodes with the highest concentration of climate-exposed properties — and why postcode risk alone is never enough.
Postcode data from BOM · CSIRO · Geoscience Australia · Address-level reports from A$69
⚠️ Postcode risk is a starting point — not a definitive answer
Within a single postcode, a property on a flood plain and one on a ridge can have completely different risk profiles. ClimateNest gives you address-level risk — the exact flood zone, BAL rating and coastal exposure for your specific property.
Check your address now →High-risk postcodes by state
NSW
2480
Lismore
Australia's most flood-affected large town. Repeatedly inundated in 2017, 2021 and 2022. Active buyback scheme underway for highest-risk properties.
2753
Windsor–Richmond (Hawkesbury)
Hawkesbury-Nepean Valley flood plain. 130,000+ people exposed. One of Australia's highest-consequence flood zones per Geoscience Australia.
2785
Blue Mountains
High concentration of BAL-29 to BAL-FZ properties. Significant fire history. Proximity to Greater Blue Mountains wilderness area.
2536
Batemans Bay
Severely affected in 2019–20 Black Summer. Combination of bushfire and coastal erosion risk.
2484
Murwillumbah–Tweed
Tweed River flood plain. Northern Rivers region repeatedly flooded in 2022. Some properties in active buyback discussions.
QLD
4305
Ipswich
Significant proportion of residential properties in Bremer River and Brisbane River flood overlays. Major inundation in 2011, 2022 and 2024.
4207
Logan
Logan River flood plain. Large number of properties in Council flood overlay. Insurance costs significantly elevated.
4870
Cairns
Combined cyclone, storm surge and rainfall flooding risk. Cyclone reinsurance pool applies. Extreme event frequency projected to increase.
4551
Caloundra–Sunshine Coast
Low-lying coastal areas face combined erosion, storm surge and flooding risk. Beach front properties at active shoreline retreat risk.
4740
Mackay
North QLD cyclone corridor. Pioneer River flood risk combined with storm surge. Significant insurance cost loading.
VIC
3139
Yarra Valley–Healesville
High bushfire risk. Close to Kinglake, Marysville affected in 2009 Black Saturday. Ongoing elevated BAL ratings across residential areas.
3825
Moe–Morwell (Latrobe Valley)
Latrobe River flood history and proximity to bushfire-prone forests. Combined multi-hazard exposure.
3500
Mildura
Murray River flood risk elevated after 2022–23 events. Extreme heat days above 40°C increasingly frequent.
WA
6076
Kalamunda–Perth Hills
Perth's eastern hills — high bushfire risk zone. BAL-29 to BAL-40 properties common. Insurance premiums significantly elevated.
6280
Margaret River–Busselton
Southwest WA bushfire risk combined with coastal erosion on Geographe Bay.
SA
5153
Adelaide Hills
Hills Face Zone and surrounding areas. Catastrophic fire conditions in 2019–20. High BAL ratings across residential areas near bushland.
5222
Kangaroo Island
48% of the island burned in 2019–20 fires. Significant ongoing fire risk in vegetated areas. Tourism economy impact ongoing.
Sources: BOM, CSIRO, Geoscience Australia, state flood and fire authority datasets. Risk profiles are indicative at postcode level. Address-level risk may differ significantly.
Frequently asked questions
Are high climate risk postcodes getting worse over time?
Yes. CSIRO climate projections show that flood frequency, fire weather severity and coastal erosion rates are all projected to increase across most high-risk Australian postcodes under every emissions scenario. The gap between high-risk and low-risk postcodes is expected to widen significantly by 2050.
Do insurers use postcodes to price home insurance?
Yes, postcode is one of the primary pricing variables used by Australian insurers for flood, storm and bushfire cover. High-risk postcodes typically attract premium loadings of 50–300% compared to low-risk equivalents. In some high-risk postcodes, insurers have withdrawn flood cover entirely.
Can I still buy property in a high-risk postcode?
Yes. High-risk postcodes are not no-go zones, but buyers should understand the risk they are taking on — including insurance costs, potential value trajectory and the degree of climate risk at the specific address within that postcode. A ClimateNest address-level report gives you the full picture before you commit.
What is the difference between a flood-prone postcode and a flood overlay?
A flood-prone postcode is a general indicator that a significant number of properties in that postcode sit in flood-affected areas. A flood overlay is a council-mapped designation on a specific property, recorded in planning certificates. Address-level ClimateNest reports identify whether your specific property has a flood overlay, not just whether the postcode has general flood exposure.
Get address-level risk, not just postcode risk
Postcode data tells you the neighbourhood. ClimateNest tells you about your specific property. From A$69.