Back to map

Time Difference: Seattle to Sydney

🇺🇸SeattleUTC-8
vs
🇦🇺SydneyUTC+10
🇺🇸
Seattle, US
Wed, Jun 3
🇦🇺
Sydney, Australia
Wed, Jun 3

Click a time to convert

Time Difference
17 hours
Sydney is 17 hours ahead of Seattle
Compare on map
🇺🇸
Seattle
View city page
🇦🇺
Sydney
View city page

Seattle vs Sydney timezone guide

Seattle (US) uses the America/Los_Angeles timezone at UTC-8, while Sydney (Australia) uses Australia/Sydney at UTC+10. This means Sydney is 18 hours ahead of Seattle (based on standard offsets — the live difference above accounts for daylight saving time).

Best meeting times between Seattle and Sydney

Standard 9-to-5 working hours in Seattle and Sydney do not overlap. To meet synchronously, one side will need to start early or stay late — see the hour-by-hour planner below for the least disruptive options.

Hour-by-hour planner

SeattleSydneyStatus
6am11pmSeattle early, Sydney late evening
7am12amSeattle early, Sydney asleep
8am1amSeattle early, Sydney asleep
9am2amSeattle working hours, Sydney asleep
10am3amSeattle working hours, Sydney asleep
11am4amSeattle working hours, Sydney asleep
12pm5amSeattle working hours, Sydney asleep
1pm6amOne side outside 9-to-5 but still awake
2pm7amOne side outside 9-to-5 but still awake
3pm8amOne side outside 9-to-5 but still awake
4pm9amBoth at work — ideal meeting time
5pm10amOne side outside 9-to-5 but still awake
6pm11amOne side outside 9-to-5 but still awake
7pm12pmOne side outside 9-to-5 but still awake
8pm1pmOne side outside 9-to-5 but still awake
9pm2pmOne side outside 9-to-5 but still awake
10pm3pmSeattle late evening, Sydney working hours

Green = standard working hours (9 AM – 5 PM). Amber = early (6–9 AM). Orange = evening (5–10 PM). Grey = asleep or late.

Daylight saving time between Seattle and Sydney

Both cities observe daylight saving time, but on different schedules. This creates short windows each year where the usual difference of 17 hours behind temporarily shifts.

  • Dec 31 → Mar 8Difference temporarily 19 hours behind.
  • Mar 8 → Apr 4Difference temporarily 18 hours behind.
  • Oct 3 → Nov 1Difference temporarily 18 hours behind.
  • Nov 1 → Dec 31Difference temporarily 19 hours behind.

Seattle transitions on March 8, 2026 and November 1, 2026. Sydney transitions on April 5, 2026 and October 4, 2026.

Distance between Seattle and Sydney

Great-circle distance
12,470 km
Direct flight time
~15h 40m

Seattle and Sydney are 12,470 km apart along the great-circle route. A direct flight takes roughly ~15h 40m, depending on aircraft type, winds, and routing.

More comparisons

Seattle to New YorkSeattle to LondonSeattle to TokyoSydney to New YorkSydney to LondonSydney to TokyoSydney to Dubai

Frequently asked questions

What is the time difference between Seattle and Sydney?
The current time difference is 17 hours. Seattle is currently 17 hours behind Sydney.
Is Seattle ahead of Sydney?
No. Seattle is currently 17 hours behind Sydney.
What time is it in Sydney when it's 9 AM in Seattle?
When it's 9 AM in Seattle, it's 2am in Sydney.
When is the best time to schedule a meeting between Seattle and Sydney?
Standard 9-to-5 working hours in Seattle and Sydney do not overlap. To meet synchronously, one side will need to start before 9 AM or work past 5 PM — see the planner above for the least disruptive options.
Do Seattle and Sydney observe daylight saving time?
Seattle and Sydney both observe daylight saving time, but on different schedules. Short windows each year (a week or two around each set of transitions) produce a temporarily different offset.
How far apart are Seattle and Sydney?
Seattle and Sydney are 12,470 km apart along the great-circle route. A direct flight takes roughly 15 hours 40 minutes.