Home / World Clock / Bangkok vs Sydney
Bangkok vs Sydney Time Difference
Bangkok and Sydney usually sit three hours apart, with Sydney ahead — widening to four hours during Sydney's Southern Hemisphere daylight saving season (October to April).
Bangkok
Asia/Bangkok
Sydney
Australia/Sydney
Calculating the live gap…
A gap that swings with Australia's seasons
Bangkok and Sydney sit three to four hours apart, with Sydney always ahead. The variation comes entirely from Sydney's side: Australia observes daylight saving from October to April, the Southern Hemisphere's summer half of the year, while Bangkok's clock never moves at all. That means the three-hour "standard" gap widens to four hours for almost half of every year — a longer DST season, relative to the calendar, than most Northern Hemisphere pairings on this site experience.
Opposite hemispheres, opposite seasons
Because Sydney is in the Southern Hemisphere, its "summer" daylight saving months land in what's winter for most of the Northern Hemisphere cities covered elsewhere on this site. Bangkok, sitting just north of the equator, has barely any seasonal daylight variation of its own to speak of — so nearly all of the seasonal complexity in this pairing comes from Sydney's calendar alone.
A workable window for regional business
With a three-to-four-hour gap, Bangkok and Sydney share a solid stretch of overlapping business hours through the Bangkok afternoon and Sydney evening, making this a manageable pairing for Southeast Asia-Australia coordination.
Best time to call, hour by hour
The table below runs through a full Bangkok day and shows the matching Sydney time for each hour, based on today's live gap.
| Bangkok time | Sydney time | Both in business hours? |
|---|---|---|
| Calculating… | ||
The highlighted rows show Bangkok's afternoon lining up with Sydney's evening — the natural window for calls between the two.
How we calculate this page: both live clocks, the current gap, the DST transition dates, and the hour-by-hour overlap table are all computed directly from the IANA Asia/Bangkok and Australia/Sydney time zone data via your browser on every page load — nothing here is a fixed, hard-coded figure.
Frequently asked questions
What is the time difference between Bangkok and Sydney?
Usually three hours, with Sydney ahead, widening to four hours while Sydney observes Southern Hemisphere daylight saving time (roughly October to April).
Why is Sydney's daylight saving on a different schedule than most cities on this site?
Sydney is in the Southern Hemisphere, so its summer — and its daylight saving period — falls from October to April, the opposite half of the year from Northern Hemisphere cities like London or New York.
Does Bangkok observe daylight saving time?
No. Thailand has never observed daylight saving time; its clock has held at a fixed UTC+7 since 1920. Sydney is the only side of this pairing whose clock shifts.
What is the best time to call between Bangkok and Sydney?
Roughly 9:00 a.m. to 2:00 p.m. in Bangkok lands in the early-to-late afternoon in Sydney most of the year — a solid overlap window for both standard workdays.
Why are Bangkok and Sydney a useful pairing to track?
Both are major regional hubs — Bangkok for Southeast Asia, Sydney for Australia and the South Pacific — and Sydney's seasonal DST shift means the practical gap between them genuinely changes over the course of the year, unlike fixed-offset pairings.
How do I convert Bangkok time to Sydney time?
Add three hours most of the year, or four hours while Sydney observes daylight saving (roughly October through April). For a guaranteed-accurate conversion on any specific date, use the time zone converter on WatchTime Online.
Need a different pairing? Try the meeting planner or see all cities on the world clock.