San Diego to Sydney Time Difference
Sydney is 18 hours ahead of San Diego. When it's 05:57:40 AM in San Diego, it's 11:57:40 PM in Sydney.
How Many Hours Ahead Is Sydney From San Diego?
Sydney is 18 hours ahead of San Diego. So San Diego is 18 hours behind Sydney looking the other way — the same gap, described from the other end.
In practice that means a working day in San Diego starts when it is already 3:00 AM the next day in Sydney. 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 San Diego and Sydney
Both cities are inside normal business hours between 3:00 PM and 5:00 PM in San Diego — that's 9:00 AM to 11:00 AM in Sydney. That's a 2-hour window, so a call fits comfortably in either side's working day.
both at work San Diego only Sydney only neither — hours shown along the strip are San Diego local time.
Convert a Specific Time
Pick any date and time in San Diego to see the exact equivalent in Sydney.
Common Times Converted
San Diego time on the left, Sydney time on the right.
San Diego to Sydney: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in San Diego. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| San Diego | Sydney | Working hours |
|---|---|---|
| 12:00 AM | 6:00 PM | — |
| 1:00 AM | 7:00 PM | — |
| 2:00 AM | 8:00 PM | — |
| 3:00 AM | 9:00 PM | — |
| 4:00 AM | 10:00 PM | — |
| 5:00 AM | 11:00 PM | — |
| 6:00 AM | 12:00 AM next day | — |
| 7:00 AM | 1:00 AM next day | — |
| 8:00 AM | 2:00 AM next day | — |
| 9:00 AM | 3:00 AM next day | San Diego only |
| 10:00 AM | 4:00 AM next day | San Diego only |
| 11:00 AM | 5:00 AM next day | San Diego only |
| 12:00 PM | 6:00 AM next day | San Diego only |
| 1:00 PM | 7:00 AM next day | San Diego only |
| 2:00 PM | 8:00 AM next day | San Diego only |
| 3:00 PM | 9:00 AM next day | Both cities |
| 4:00 PM | 10:00 AM next day | Both cities |
| 5:00 PM | 11:00 AM next day | Sydney only |
| 6:00 PM | 12:00 PM next day | Sydney only |
| 7:00 PM | 1:00 PM next day | Sydney only |
| 8:00 PM | 2:00 PM next day | Sydney only |
| 9:00 PM | 3:00 PM next day | Sydney only |
| 10:00 PM | 4:00 PM next day | Sydney only |
| 11:00 PM | 5:00 PM next day | — |
Understanding the San Diego – Sydney Time Difference
San Diego runs on America/Los_Angeles, currently PDT (UTC-7:00). Sydney runs on Australia/Sydney, currently AEDT (UTC+11:00). 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 the United States · Daylight Saving Time in Australia.
San Diego today
Sydney today
Frequently Asked Questions
What is the time difference between San Diego and Sydney?
Sydney is currently 18 hours ahead of San Diego. That gap becomes 19 hours on Sunday, November 1, 2026, when San Diego changes its clocks.
How many hours ahead is Sydney from San Diego?
Sydney is 18 hours ahead of San Diego. Looking at it the other way, San Diego is 18 hours behind Sydney.
What time is it in Sydney when it is 9:00 AM in San Diego?
When it is 9:00 AM in San Diego, it is 3:00 AM the next day in Sydney.
Is Sydney ahead of or behind San Diego?
Sydney is 18 hours ahead of San Diego. Sydney reaches each point in the day first, so its working day is already finishing while San Diego is still getting started.
What is the best time to call between San Diego and Sydney?
Between 3:00 PM and 5:00 PM San Diego time, which is 9:00 AM to 11:00 AM in Sydney. Both cities are inside normal business hours during that window.
Does the time difference between San Diego and Sydney 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 San Diego and Sydney in?
San Diego uses the America/Los_Angeles time zone, currently PDT (UTC-7:00). Sydney uses Australia/Sydney, currently AEDT (UTC+11:00).