Time Difference: Perth vs San Francisco
Perth
11:02:59 AM AWST
Thursday, May 14, 2026
15h
15h
San Francisco
8:02:59 PM PDT
Wednesday, May 13, 2026
San Francisco is 15 hours behind Perth.
Quick Reference
- Perth
- AWST (GMT+8)
No Daylight Saving Time
- San Francisco
- PDT (GMT-7)
PST starts on Nov 1, 2026
Frequently Asked Questions
- What is the time difference between Perth and San Francisco?
- San Francisco is 15 hours behind Perth.
- When is the best time to call from Perth to San Francisco?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Perth uses AWST and San Francisco uses PDT.