London to San Diego Time Difference
San Diego is 8 hours behind London. When it's 01:58:18 PM in London, it's 05:58:18 AM in San Diego.
How Many Hours Behind Is San Diego From London?
San Diego is 8 hours behind London. So London is 8 hours ahead of San Diego 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 Diego. 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 Diego
Standard 9-to-5 hours in London and San Diego 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 Diego.
both at work London only San Diego 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 Diego.
Common Times Converted
London time on the left, San Diego time on the right.
London to San Diego: 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 Diego | Working hours |
|---|---|---|
| 12:00 AM | 4:00 PM prev day | San Diego 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 Diego only |
| 6:00 PM | 10:00 AM | San Diego only |
| 7:00 PM | 11:00 AM | San Diego only |
| 8:00 PM | 12:00 PM | San Diego only |
| 9:00 PM | 1:00 PM | San Diego only |
| 10:00 PM | 2:00 PM | San Diego only |
| 11:00 PM | 3:00 PM | San Diego only |
Understanding the London – San Diego Time Difference
London runs on Europe/London, currently BST (UTC+1:00). San Diego 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 Diego today
Frequently Asked Questions
What is the time difference between London and San Diego?
San Diego 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 Diego from London?
San Diego is 8 hours behind London. Looking at it the other way, London is 8 hours ahead of San Diego.
What time is it in San Diego when it is 9:00 AM in London?
When it is 9:00 AM in London, it is 1:00 AM in San Diego.
Is San Diego ahead of or behind London?
San Diego is 8 hours behind London. London reaches each point in the day first, so San Diego is still getting started while the London working day is finishing.
What is the best time to call between London and San Diego?
Standard business hours in London and San Diego 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 Diego.
Does the time difference between London and San Diego 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 Diego in?
London uses the Europe/London time zone, currently BST (UTC+1:00). San Diego uses America/Los_Angeles, currently PDT (UTC-7:00).