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