United States
Australia
Seattle to Sydney Time Difference
Sydney is 18 hours ahead of Seattle
Seattle vs Sydney — At a Glance
Seattle to Sydney — Hour-by-Hour
About Seattle and Sydney
Seattle (population: 0.74M) is known for Amazon, Microsoft, Boeing, coffee culture, and the Pacific Northwest. Sydney (population: 5.3M) is known for the Opera House, Harbour Bridge, Australia's financial center, and surfing culture.
Business Hours Overlap
The 18-hour gap means Seattle and Sydney have almost no standard-hours overlap. Early morning calls from Seattle or late evening calls from Sydney are the most practical options.
Calling Between Cities
With 18 hours between Seattle (+1) and Sydney (+61), finding a mutually convenient calling time is tricky. Consider scheduling calls in advance rather than calling spontaneously.
Currency
Seattle uses USD while Sydney uses AUD. Check current exchange rates before making payments or transferring funds between the two cities.
Language
Seattle and Sydney share English as a common language, which simplifies business communication.
Use our world clock tool to compare Seattle and Sydney visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between Seattle and Sydney?
Sydney, Australia is 18 hours ahead of Seattle, United States. Seattle is in the America/Los Angeles timezone (UTC-7) and Sydney is in the Australia/Sydney timezone (UTC+11).
When it's noon in Seattle, what time is it in Sydney?
When it's 12:00 PM (noon) in Seattle, it's 6:00 AM in Sydney.
What is the best time to call Sydney from Seattle?
The best time to call Sydney from Seattle is during the overlapping business hours. When it's 9 AM in Seattle, it's 3:00 AM in Sydney. Aim for late morning to early afternoon in Seattle for the best chance of reaching someone during working hours.
What currency does Sydney use?
Sydney, Australia uses AUD. Seattle uses USD. You will need to check the current exchange rate for transactions between the two.
What language is spoken in Sydney?
The primary language in Sydney is English. Seattle also speaks English, making communication easier.
How do I dial Sydney from Seattle?
To call Sydney from Seattle, dial your international access code followed by +61 and the local number. Seattle uses country code +1 and Sydney uses +61.
