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Time difference between Seattle and Sydney

Sydney is 18 hours ahead of Seattle.

Seattle
United States · Pacific Daylight Time
12:42 AM
Wednesday, October 21, 2026
Sydney
Australia · Australian Eastern Daylight Time
6:42 PM
Wednesday, October 21, 2026
Compare more placesSydney to Seattle

Seattle to Sydney time converter

Green rows are office hours in both places; light green rows are when both are awake.

SeattleSydney
12:00 AM6:00 PM
1:00 AM7:00 PM
2:00 AM8:00 PM
3:00 AM9:00 PM
4:00 AM10:00 PM
5:00 AM11:00 PM
6:00 AM12:00 AM (next day)
7:00 AM1:00 AM (next day)
8:00 AM2:00 AM (next day)
9:00 AM3:00 AM (next day)
10:00 AM4:00 AM (next day)
11:00 AM5:00 AM (next day)
12:00 PM6:00 AM (next day)
1:00 PM7:00 AM (next day)
2:00 PM8:00 AM (next day)
3:00 PM9:00 AM (next day)
4:00 PM10:00 AM (next day)
5:00 PM11:00 AM (next day)
6:00 PM12:00 PM (next day)
7:00 PM1:00 PM (next day)
8:00 PM2:00 PM (next day)
9:00 PM3:00 PM (next day)
10:00 PM4:00 PM (next day)
11:00 PM5:00 PM (next day)

Questions

What is the time difference between Seattle and Sydney?

Sydney is 18 hours ahead of Seattle. Seattle is on UTC−7 and Sydney is on UTC+11.

What time is it in Sydney when it is 9 AM in Seattle?

When it is 9:00 AM in Seattle, it is 3:00 AM the next day in Sydney.

When is the best time to call Sydney from Seattle?

The best time to call or meet is 3:00 PM–6:00 PM in Seattle (9:00 AM–12:00 PM in Sydney), when both places are in normal office hours.

Does the time difference between Seattle and Sydney change?

Yes. Because of daylight saving time, the difference changes on Sunday, November 1, 2026, when Sydney will be 19 hours ahead of Seattle.

Seattle is 18 hours behind Sydney. More: time in Seattle · time in Sydney

Time difference from Seattle to other cities

All Seattle time differences →

Time difference from Sydney