Sydney to San Diego Time Difference
San Diego is 18 hours behind Sydney. When it's 02:08:33 AM in Sydney, it's 08:08:33 AM in San Diego.
How Many Hours Behind Is San Diego From Sydney?
San Diego is 18 hours behind Sydney. So Sydney is 18 hours ahead of San Diego looking the other way — the same gap, described from the other end.
In practice that means a working day in Sydney starts when it is already 3:00 PM the previous day in San Diego. The gap is not fixed all year: it becomes 19 hours on Sunday, November 1, 2026, when San Diego changes its clocks.
Best Time to Call Sydney and San Diego
Both cities are inside normal business hours between 9:00 AM and 11:00 AM in Sydney — that's 3:00 PM to 5:00 PM in San Diego. That's a 2-hour window, so a call fits comfortably in either side's working day.
both at work Sydney only San Diego only neither — hours shown along the strip are Sydney local time.
Convert a Specific Time
Pick any date and time in Sydney to see the exact equivalent in San Diego.
Common Times Converted
Sydney time on the left, San Diego time on the right.
Sydney to San Diego: Full 24-Hour Conversion Table
Based on today, Monday, October 12, 2026 in Sydney. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Sydney | San Diego | Working hours |
|---|---|---|
| 12:00 AM | 6:00 AM prev day | — |
| 1:00 AM | 7:00 AM prev day | — |
| 2:00 AM | 8:00 AM prev day | — |
| 3:00 AM | 9:00 AM prev day | San Diego only |
| 4:00 AM | 10:00 AM prev day | San Diego only |
| 5:00 AM | 11:00 AM prev day | San Diego only |
| 6:00 AM | 12:00 PM prev day | San Diego only |
| 7:00 AM | 1:00 PM prev day | San Diego only |
| 8:00 AM | 2:00 PM prev day | San Diego only |
| 9:00 AM | 3:00 PM prev day | Both cities |
| 10:00 AM | 4:00 PM prev day | Both cities |
| 11:00 AM | 5:00 PM prev day | Sydney only |
| 12:00 PM | 6:00 PM prev day | Sydney only |
| 1:00 PM | 7:00 PM prev day | Sydney only |
| 2:00 PM | 8:00 PM prev day | Sydney only |
| 3:00 PM | 9:00 PM prev day | Sydney only |
| 4:00 PM | 10:00 PM prev day | Sydney only |
| 5:00 PM | 11:00 PM prev day | — |
| 6:00 PM | 12:00 AM | — |
| 7:00 PM | 1:00 AM | — |
| 8:00 PM | 2:00 AM | — |
| 9:00 PM | 3:00 AM | — |
| 10:00 PM | 4:00 AM | — |
| 11:00 PM | 5:00 AM | — |
Understanding the Sydney – San Diego Time Difference
Sydney runs on Australia/Sydney, currently AEDT (UTC+11:00). San Diego runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 18 hours is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, November 1, 2026, when San Diego adjusts its clocks and the difference becomes 19 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in Australia · Daylight Saving Time in the United States.
Sydney today
San Diego today
Frequently Asked Questions
What is the time difference between Sydney and San Diego?
San Diego is currently 18 hours behind Sydney. That gap becomes 19 hours on Sunday, November 1, 2026, when San Diego changes its clocks.
How many hours behind is San Diego from Sydney?
San Diego is 18 hours behind Sydney. Looking at it the other way, Sydney is 18 hours ahead of San Diego.
What time is it in San Diego when it is 9:00 AM in Sydney?
When it is 9:00 AM in Sydney, it is 3:00 PM the previous day in San Diego.
Is San Diego ahead of or behind Sydney?
San Diego is 18 hours behind Sydney. Sydney reaches each point in the day first, so San Diego is still getting started while the Sydney working day is finishing.
What is the best time to call between Sydney and San Diego?
Between 9:00 AM and 11:00 AM Sydney time, which is 3:00 PM to 5:00 PM in San Diego. Both cities are inside normal business hours during that window.
Does the time difference between Sydney and San Diego change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to 19 hours on Sunday, November 1, 2026.
What time zones are Sydney and San Diego in?
Sydney uses the Australia/Sydney time zone, currently AEDT (UTC+11:00). San Diego uses America/Los_Angeles, currently PDT (UTC-7:00).