Time difference
London to San Juan Time Difference
San Juan is 5 hours behind London — when it's 12:00 PM in London, it's 7:00 AM in San Juan. (London (Europe/London, BST); San Juan (America/Puerto_Rico, AST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
San Juan is 5 hours behind London. The best window for a call is 2 PM–5 PM in London, which is 9 AM–12 PM in San Juan — a 3-hour overlap inside 9 AM–5 PM on both sides. Clocks change on October 25, 2026, which briefly shifts the gap between London and San Juan — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in London, it's 4:00 AM in San Juan.
- When it's 9:00 AM in San Juan, it's 2:00 PM in London.
San Juan is currently 5 hours behind London.
Interactive converter
12:00PM
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Best times to meet
The 9 AM – 5 PM business windows in London and San Juan overlap for 3 hours. 2 PM–5 PM in London is 9 AM–12 PM in San Juan. Aim somewhere in the middle of that window so neither side starts cold or finishes drained.
Quick conversion table
| London | San Juan |
|---|---|
| 12 AM | 7:00 PM (prev day) |
| 1 AM | 8:00 PM (prev day) |
| 2 AM | 9:00 PM (prev day) |
| 3 AM | 10:00 PM (prev day) |
| 4 AM | 11:00 PM (prev day) |
| 5 AM | 12:00 AM |
| 6 AM | 1:00 AM |
| 7 AM | 2:00 AM |
| 8 AM | 3:00 AM |
| 9 AM | 4:00 AM |
| 10 AM | 5:00 AM |
| 11 AM | 6:00 AM |
| 12 PM | 7:00 AM |
| 1 PM | 8:00 AM |
| 2 PM | 9:00 AM |
| 3 PM | 10:00 AM |
| 4 PM | 11:00 AM |
| 5 PM | 12:00 PM |
| 6 PM | 1:00 PM |
| 7 PM | 2:00 PM |
| 8 PM | 3:00 PM |
| 9 PM | 4:00 PM |
| 10 PM | 5:00 PM |
| 11 PM | 6:00 PM |
Daylight saving
On October 25, 2026, London shifts for daylight saving. After that, San Juan will be 4 hours behind London (currently 5 hours behind London). The converter and the tables above always reflect the correct offset for the date you pick.
- London is currently observing daylight saving time.
- San Juan does not observe daylight saving time.
Frequently asked questions
- Is San Juan ahead of or behind London?
- San Juan is 5 hours behind London.
- How many hours behind London is San Juan?
- San Juan is 5 hours behind London.
- What time is 9 AM in London in San Juan?
- 9:00 AM in London is 4:00 AM in San Juan.
- What time is noon in London in San Juan?
- 12:00 PM in London is 7:00 AM in San Juan.
- What time is 5 PM in London in San Juan?
- 5:00 PM in London is 12:00 PM in San Juan. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in London in San Juan?
- 3:00 PM in London is 10:00 AM in San Juan.
- Is London currently observing daylight saving time?
- London is currently observing daylight saving time (summer time).
- Is San Juan currently observing daylight saving time?
- San Juan does not observe daylight saving time — its UTC offset stays the same all year.
- Do London and San Juan observe daylight saving?
- On October 25, 2026, London shifts for daylight saving. After that, San Juan will be 4 hours behind London (currently 5 hours behind London). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call San Juan from London?
- Aim for 2 PM–5 PM in London, which is 9 AM–12 PM in San Juan.
- When is the best time to call London from San Juan?
- Aim for 9 AM–12 PM in San Juan, which is 2 PM–5 PM in London.
- London (BST) to San Juan (AST) — how do I convert quickly?
- Subtract 5 hours from London local time to get San Juan local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
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