London to San Francisco Time Difference
San Francisco is 8 hours behind London. When it's 03:20:17 PM in London, it's 07:20:17 AM in San Francisco.
How Many Hours Behind Is San Francisco From London?
San Francisco is 8 hours behind London. So London is 8 hours ahead of San Francisco looking the other way — the same gap, described from the other end.
In practice that means a working day in London starts when it is already 1:00 AM in San Francisco. The gap is not fixed all year: it becomes 7 hours on Sunday, October 25, 2026, when London changes its clocks.
Best Time to Call London and San Francisco
Standard 9-to-5 hours in London and San Francisco never overlap, so someone has to take the call outside their working day. The most workable window is 3:00 PM to 10:00 PM in London, which is 7:00 AM to 2:00 PM in San Francisco.
both at work London only San Francisco only neither — hours shown along the strip are London local time.
Convert a Specific Time
Pick any date and time in London to see the exact equivalent in San Francisco.
Common Times Converted
London time on the left, San Francisco time on the right.
London to San Francisco: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in London. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| London | San Francisco | Working hours |
|---|---|---|
| 12:00 AM | 4:00 PM prev day | San Francisco only |
| 1:00 AM | 5:00 PM prev day | — |
| 2:00 AM | 6:00 PM prev day | — |
| 3:00 AM | 7:00 PM prev day | — |
| 4:00 AM | 8:00 PM prev day | — |
| 5:00 AM | 9:00 PM prev day | — |
| 6:00 AM | 10:00 PM prev day | — |
| 7:00 AM | 11:00 PM prev day | — |
| 8:00 AM | 12:00 AM | — |
| 9:00 AM | 1:00 AM | London only |
| 10:00 AM | 2:00 AM | London only |
| 11:00 AM | 3:00 AM | London only |
| 12:00 PM | 4:00 AM | London only |
| 1:00 PM | 5:00 AM | London only |
| 2:00 PM | 6:00 AM | London only |
| 3:00 PM | 7:00 AM | London only |
| 4:00 PM | 8:00 AM | London only |
| 5:00 PM | 9:00 AM | San Francisco only |
| 6:00 PM | 10:00 AM | San Francisco only |
| 7:00 PM | 11:00 AM | San Francisco only |
| 8:00 PM | 12:00 PM | San Francisco only |
| 9:00 PM | 1:00 PM | San Francisco only |
| 10:00 PM | 2:00 PM | San Francisco only |
| 11:00 PM | 3:00 PM | San Francisco only |
Understanding the London – San Francisco Time Difference
London runs on Europe/London, currently BST (UTC+1:00). San Francisco runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 8 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, October 25, 2026, when London adjusts its clocks and the difference becomes 7 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United Kingdom · Daylight Saving Time in the United States.
London today
San Francisco today
Frequently Asked Questions
What is the time difference between London and San Francisco?
San Francisco is currently 8 hours behind London. That gap becomes 7 hours on Sunday, October 25, 2026, when London changes its clocks.
How many hours behind is San Francisco from London?
San Francisco is 8 hours behind London. Looking at it the other way, London is 8 hours ahead of San Francisco.
What time is it in San Francisco when it is 9:00 AM in London?
When it is 9:00 AM in London, it is 1:00 AM in San Francisco.
Is San Francisco ahead of or behind London?
San Francisco is 8 hours behind London. London reaches each point in the day first, so San Francisco is still getting started while the London working day is finishing.
What is the best time to call between London and San Francisco?
Standard business hours in London and San Francisco do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 3:00 PM to 10:00 PM in London, which is 7:00 AM to 2:00 PM in San Francisco.
Does the time difference between London and San Francisco 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 7 hours on Sunday, October 25, 2026.
What time zones are London and San Francisco in?
London uses the Europe/London time zone, currently BST (UTC+1:00). San Francisco uses America/Los_Angeles, currently PDT (UTC-7:00).