Is Onslow, WA Climate Safe? 2026 Assessment
Climate Safety Score
7.2/10Climate risk is high — address assessment recommended
Key Facts
- Climate Safety
- High
- Flood
- Onslow faces a moderate risk of flooding, primarily from heavy rainfall events and storm surges. The town's low-lying coastal location makes it vulnerable to inundation.
- Bushfire
- The risk of bushfire in Onslow is moderate due to the surrounding arid landscape and vegetation. Hot, dry conditions during the summer months increase the likelihood of fire ignition and spread.
- Heat
- Onslow experiences extreme heat, particularly during the summer months. Rising temperatures due to climate change are expected to exacerbate heat stress on residents and infrastructure.
- Storm
- Moderate storm risk — winter storms and occasional severe thunderstorms
- Postcode
- 6710
- Highest high-risk exposure
- 9.2% of land (bushfire)
Climate Safety Analysis
Onslow in Western Australia has an overall climate safety rating of High. 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 Onslow's climate safety include heat, flood, coastal, bushfire. 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 Onslow 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 Onslow including address-level hazard mapping, insurance outlook, and adaptation recommendations, use the ClimateNest full analysis tool.
Onslow (postcode 6710) 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 (9.2% of land in high-risk zones), surface flood (6.1% of land in high-risk zones), extreme wind (5.2% of land in high-risk zones). Exposure is not uniform across Onslow — 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
Tropical Cyclone Joyce caused heavy rainfall and flooding in Onslow.
Heavy rainfall caused flooding in Onslow, disrupting transportation and damaging infrastructure.
A prolonged heatwave affected Onslow, with temperatures exceeding 40°C for several consecutive days.
Tropical Cyclone Clare caused significant damage to infrastructure in Onslow.
Adaptation & Mitigation Actions
Upgrade Coastal Defenses
ImmediateInvest in seawalls and other coastal defenses to protect against sea level rise and storm surge.
Est. cost: High
Improve Heatwave Preparedness
ImmediateDevelop and implement heatwave early warning systems and public awareness campaigns.
Est. cost: Medium
Enhance Flood Management
Near-termImprove drainage infrastructure and implement flood-resistant building codes.
Est. cost: Medium
Strengthen Bushfire Resilience
Near-termImplement bushfire mitigation measures, such as controlled burns and vegetation management.
Est. cost: Medium
Promote Water Conservation
Long-termEncourage water conservation practices to reduce water stress during periods of drought.
Est. cost: Low
Council & Emergency Services
Explore Onslow Risk Reports
View other climate risk assessments for Onslow:
Frequently Asked Questions
Is Onslow safe from climate change?
No location in Australia is entirely immune to climate change impacts. Onslow has an overall High 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 Onslow?
The dominant hazard for Onslow 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 Onslow 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 Western Australia suburbs.
Should I be concerned about buying property in Onslow?
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 Onslow?
Key projections for Western Australia 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 Onslow.
What share of Onslow is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 9.2% of Onslow in high-risk zones for bushfire, with a further 76.7% 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 Onslow Safe from Climate Risk?
Enter your address below for an instant climate risk assessment for Onslow, Western Australia, covering flood, bushfire, sea level rise and more.
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Full report from A$69 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections