Seattle vs Sydney

How to read the comparison chart

The grouped bars score each city 0–100 on cost, climate and safety — taller is better. Seattle leads on any axis where its bar is higher, Sydney where its is. The cost bar uses a higher-is-cheaper scale, so Seattle's taller cost bar reflects its lower cost of living, not a higher price.

Seattle vs Sydney: the short answer

Seattle comes out ahead on overall livability (59/100), only marginally above Sydney (57/100). The two cities diverge most on cost of living. On affordability Seattle is the cheaper base — a moderate gap on our cost index (Seattle 19 vs Sydney 5, where a higher score means a lower cost of living, normalised from World Bank price levels). For climate, Sydney runs warmer in summer (about 22.6°C peak vs 18.6°C in Seattle), while winter lows sit near 4.5°C in Seattle and 12.4°C in Sydney. On natural-disaster exposure Sydney is the safer choice (safety 73/100); the dominant modelled hazard is wildfire for Seattle and storms (hurricane/cyclone) for Sydney.

Which city should you choose?

• On a tight budget → Seattle — lower everyday costs.
• You want warmth → Sydney — hotter summers.
• Safety is the priority → Sydney — lower disaster risk.
• Best all-rounder → Seattle — highest overall livability.

Data & methodology

Cost scores are normalised from World Bank price-level data. Climate figures (summer highs, winter lows) are drawn from 1991–2020 climate normals. Disaster-safety blends USGS earthquake history (magnitude 4.5+ within 300 km since 1980), tropical-cyclone basin position, flood/elevation exposure and Köppen climate zone. The livability score is the weighted composite of cost, climate and safety. All figures are planning indicators for 2026, not guarantees — verify specifics before relocating.

Compiled by the CityLivably data team from open public datasets (World Bank, USGS, climate normals).

FAQ

Is Seattle or Sydney better to live in?

Seattle scores higher overall — 59 vs 57 on our 0–100 livability index, which weights cost, climate and safety.

Which is cheaper, Seattle or Sydney?

Seattle has the lower cost of living (cost index 19 vs 5; higher = cheaper, from World Bank price levels).

Which is warmer, Seattle or Sydney?

Sydney — summer highs reach about 22.6°C versus 18.6°C in Seattle.

Which is safer from natural disasters, Seattle or Sydney?

Sydney (disaster-safety 73/100). Main hazard: wildfire in Seattle, storms (hurricane/cyclone) in Sydney.

What is the main natural-disaster risk in Seattle?

wildfire is the dominant modelled hazard for Seattle on our risk index.

How is the Seattle vs Sydney comparison calculated?

Cost comes from World Bank price levels, climate from 1991–2020 normals, and disaster risk from USGS earthquake data, cyclone-basin position and flood exposure; livability is their weighted composite.