🇦🇺 Perth ↔ 🇺🇸 Seattle
Perth is usually 15 hours ahead of Seattle. Seattle observes daylight saving time and Perth does not, so the difference shifts by an hour around the changeovers.
Sunrise 7:18 AMSunset 5:21 PM(local)
Sunrise 5:13 AMSunset 9:12 PM(local)
🇦🇺 Perth
Dialing code+61
Population2,309,338
Coordinates31.95°S, 115.86°E
Elevation34 m
🇺🇸 Seattle
Dialing code+1
Population780,995
Coordinates47.61°N, 122.33°W
Elevation56 m
No comfortable common working hours — these cities barely overlap.
Working hours assumed 9:00–18:00.
Frequently asked questions
- What is the time difference between Perth and Seattle?
- Perth is 15 hours ahead of Seattle. Use the side-by-side clocks and the day/night strips above to convert any hour between them.
- When is the best time to call between Perth and Seattle?
- There is no hour when standard working hours (9:00–18:00) overlap in both Perth and Seattle, so any call falls outside business hours for at least one side.
- Why does the time difference between Perth and Seattle change?
- Because at least one of Perth and Seattle observes daylight saving time, the difference shifts by an hour when one city changes its clocks and the other has not yet (or does not).