Seoul is usually 1 hour behind Sydney. Sydney observes daylight saving time and Seoul does not, so the difference shifts by an hour around the changeovers.

SeoulSydney

Sunrise 5:18 AMSunset 7:57 PM(local)

Sunrise 7:01 AMSunset 5:00 PM(local)

Sydney: standard timeNow UTC+10. Next change: October 4, 2026 β€” clocks go forward 1 hour.
SeoulUTC+9
SydneyUTC+10

πŸ‡°πŸ‡· Seoul

Dialing code+82
Population10,349,312
Coordinates37.57Β°N, 126.98Β°E
Elevation38 m

πŸ‡¦πŸ‡Ί Sydney

Dialing code+61
Population5,557,233
Coordinates33.87Β°S, 151.21Β°E
Elevation58 m

Best time for a call: 09:00–17:00 in SeoulAdd to calendar

Working hours assumed 9:00–18:00.

Frequently asked questions

What is the time difference between Seoul and Sydney?
Seoul is 1 hour behind Sydney. 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 Seoul and Sydney?
The best window to call is 09:00–17:00 Seoul time, when working hours overlap in both cities. Pick an hour on the strips to add it to your calendar.
Why does the time difference between Seoul and Sydney change?
Because at least one of Seoul and Sydney 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).