Coastal Erosion in Australia
Sea level rise and intensifying storms are accelerating coastal erosion around Australia. Coastal properties face shoreline retreat, storm surge flooding, insurance withdrawal and long-term value risk. Know your property's exposure before you buy.
Shoreline retreat rates · CSIRO sea level projections · Storm surge exposure · From A$69
0.14–0.28m
Projected Australian sea level rise by 2050
CSIRO RCP 4.5–8.5
85%
of Australians live within 50km of the coast
ABS
$226B+
in coastal property assets exposed to inundation risk
Geoscience Australia
10,000+
km of coastline with active erosion processes
Geoscience Australia
What your coastal risk report includes
Shoreline retreat rate
Historical shoreline retreat rate (m/year) for the coastal section nearest your property, from Geoscience Australia coastal monitoring data.
Storm surge exposure
Your property's elevation relative to the 1% AEP storm surge level, and how this changes under CSIRO 2050 sea level rise scenarios.
Sea level rise projection
CSIRO RCP 4.5 and RCP 8.5 sea level projections for your specific coastal location, with inundation risk thresholds.
Property value impact
Research-backed estimate of how coastal hazard mapping and erosion risk discount property values in your area.
Insurance withdrawal risk
Flag for postcodes where insurers are beginning to withdraw coastal cover or impose extreme premium loadings for storm damage.
Adaptation recommendations
Coastal-specific guidance: sea walls, elevated building design, managed retreat considerations and council planning policy relevant to your address.
Australian coastal erosion hotspots
Gold Coast, QLD
High risk
Surfers Paradise to Coolangatta faces active shoreline retreat. The Gold Coast Shoreline Management Plan identifies multiple high-erosion priority areas.
Sources: Geoscience AU, GCCC
Byron Bay, NSW
Very High risk
Main Beach is one of Australia’s fastest-retreating shorelines. Council and state government managed retreat plans are in active discussion.
Sources: NSW Coastal Management Program, Geoscience AU
Collaroy–Narrabeen, NSW
High risk
The 2016 storm eroded up to 40m of beach at Collaroy, undermining houses and sea walls. High storm surge and erosion risk persists.
Sources: NSW Government, BOM
Sunshine Coast, QLD
Moderate-High risk
Maroochydore, Mooloolaba and Caloundra face increasing erosion risk as sea level rise amplifies storm surge events.
Sources: Sunshine Coast Council, Geoscience AU
Darwin & NT coast
High risk
Low-lying Darwin and the NT coastline face combined erosion, storm surge and cyclone risk. Sea level rise accelerates these hazards.
Sources: Geoscience AU, BOM, CSIRO
South Australia coast
Moderate risk
Yorke Peninsula and the Coorong face moderate shoreline retreat. Low-elevation coastal properties are exposed to combined erosion and storm surge.
Sources: DEWNR SA, Geoscience AU
Frequently asked questions
How do I know if my coastal property is in an erosion zone?
State and local councils publish Coastal Hazard Management Plans and Coastal Zone Management Plans which identify erosion zones. These are often available via council websites. ClimateNest cross-references these with Geoscience Australia shoreline monitoring data to give an address-level erosion risk assessment.
Does sea level rise affect property insurance in Australia?
Yes. Coastal properties in low-lying areas are already seeing insurance premium increases due to combined storm surge, flooding and erosion risk. As sea level rise elevates baseline flood levels, properties that are currently marginal become higher risk — triggering further premium increases or coverage withdrawal.
Can I build or renovate a coastal property in an erosion zone?
Development in designated coastal erosion hazard zones is tightly regulated by state and council planning rules. In many areas, new development and extensions are prohibited or require coastal engineering assessments. A ClimateNest report flags if your property is in a designated coastal hazard area and links to the relevant planning controls.
What is 'managed retreat' for coastal properties?
Managed retreat is a government policy approach where properties in high coastal erosion risk areas are progressively not replaced after they are damaged or demolished, allowing the shoreline to naturally migrate inland. Several NSW and QLD councils have managed retreat policies. Properties subject to managed retreat planning controls face significant value and developability impacts.
Check your coastal property's risk
Shoreline retreat rates · Sea level rise projections · Storm surge exposure · Insurance impact. From A$69.
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