San Diego to London Time Difference
London is 8 hours ahead of San Diego. When it's 05:06:34 AM in San Diego, it's 01:06:34 PM in London.
How Many Hours Ahead Is London From San Diego?
London is 8 hours ahead of San Diego. So San Diego is 8 hours behind London 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 5:00 PM in London. 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 San Diego and London
Standard 9-to-5 hours in San Diego and London never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 2:00 PM in San Diego, which is 3:00 PM to 10:00 PM in London.
both at work San Diego only London 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 London.
Common Times Converted
San Diego time on the left, London time on the right.
San Diego to London: 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 | London | Working hours |
|---|---|---|
| 12:00 AM | 8:00 AM | — |
| 1:00 AM | 9:00 AM | London only |
| 2:00 AM | 10:00 AM | London only |
| 3:00 AM | 11:00 AM | London only |
| 4:00 AM | 12:00 PM | London only |
| 5:00 AM | 1:00 PM | London only |
| 6:00 AM | 2:00 PM | London only |
| 7:00 AM | 3:00 PM | London only |
| 8:00 AM | 4:00 PM | London only |
| 9:00 AM | 5:00 PM | San Diego only |
| 10:00 AM | 6:00 PM | San Diego only |
| 11:00 AM | 7:00 PM | San Diego only |
| 12:00 PM | 8:00 PM | San Diego only |
| 1:00 PM | 9:00 PM | San Diego only |
| 2:00 PM | 10:00 PM | San Diego only |
| 3:00 PM | 11:00 PM | San Diego only |
| 4:00 PM | 12:00 AM next day | San Diego only |
| 5:00 PM | 1:00 AM next day | — |
| 6:00 PM | 2:00 AM next day | — |
| 7:00 PM | 3:00 AM next day | — |
| 8:00 PM | 4:00 AM next day | — |
| 9:00 PM | 5:00 AM next day | — |
| 10:00 PM | 6:00 AM next day | — |
| 11:00 PM | 7:00 AM next day | — |
Understanding the San Diego – London Time Difference
San Diego runs on America/Los_Angeles, currently PDT (UTC-7:00). London runs on Europe/London, currently BST (UTC+1:00). 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 States · Daylight Saving Time in the United Kingdom.
San Diego today
London today
Frequently Asked Questions
What is the time difference between San Diego and London?
London is currently 8 hours ahead of San Diego. That gap becomes 7 hours on Sunday, October 25, 2026, when London changes its clocks.
How many hours ahead is London from San Diego?
London is 8 hours ahead of San Diego. Looking at it the other way, San Diego is 8 hours behind London.
What time is it in London when it is 9:00 AM in San Diego?
When it is 9:00 AM in San Diego, it is 5:00 PM in London.
Is London ahead of or behind San Diego?
London is 8 hours ahead of San Diego. London 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 London?
Standard business hours in San Diego and London do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 2:00 PM in San Diego, which is 3:00 PM to 10:00 PM in London.
Does the time difference between San Diego and London 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 San Diego and London in?
San Diego uses the America/Los_Angeles time zone, currently PDT (UTC-7:00). London uses Europe/London, currently BST (UTC+1:00).