Time Difference: London vs San Francisco
San Francisco is 8 hours behind London.
Quick Reference
- London
- BST (GMT+1)
GMT starts on Oct 25, 2026
- San Francisco
- PDT (GMT-7)
PST starts on Nov 1, 2026
Frequently Asked Questions
- What is the time difference between London and San Francisco?
- San Francisco is 8 hours behind London.
- When is the best time to call from London 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. London uses BST and San Francisco uses PDT.