Porto to San Juan: time difference
San Juan is 3 h behind Porto. Live clocks for both, the working hours they share, and how each one sits against your own time.
−3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Porto 19:13 7:13 PM San Juan 16:13 4:13 PM You –:–
19:13 7:13 PM
Western European Standard Time · UTC+0
☀️ 07:12 · 🌙 17:26
16:13 4:13 PM
Argentina Standard Time · UTC-3
☀️ 06:34 · 🌙 20:03
·
−3 h
San Juan is 3 h behind Porto.
When you, Porto and San Juan are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇵🇹 Porto
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇦🇷 San Juan
21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇵🇹 Porto | 🇦🇷 San Juan |
|---|---|---|
| Local time | 19:13 | 16:13 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Western European Standard Time | Argentina Standard Time |
| UTC offset | UTC+0 | UTC-3 |
| Offset from Porto | — | −3 h |
| IANA zone | Europe/Lisbon | America/Argentina/San Juan |
| Daylight saving | On standard time → UTC+1, Mar 28, 02:00 | Not observed |
| Sunrise | 07:12 | 06:34 |
| Sunset | 17:26 | 20:03 |
| Daylight | 10 h 14 min | 13 h 29 min |
| People on this clock | 231,828 | 522,029 |
Compare Porto with another city
More comparisons with Porto: the time zones next to it and the far side of the clock.
Big time differences
Porto and San Juan: common questions
How far behind Porto is San Juan?
San Juan is 3 hours behind Porto: UTC−3 against UTC+0.
If it is 9:00 AM in Porto, what time is it in San Juan?
At 9:00 AM in Porto, clocks in San Juan show 6:00 AM.
If it is 6:00 PM in Porto, what time is it in San Juan?
At 6:00 PM in Porto, clocks in San Juan show 3:00 PM.
Is there a time when both Porto and San Juan are at work?
Yes: from 12:00 PM to 6:00 PM in Porto (9:00 AM to 3:00 PM in San Juan), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in San Juan compared with Porto?
The new day starts in San Juan later: until 3:00 AM in Porto, it is still the previous day there. From 9:00 PM in San Juan, Porto is already on the next day.
Is the time difference between Porto and San Juan the same all year?
No. Only Porto switches to summer time, so the gap changes twice a year. From March 28, 2027, San Juan will be 4 hours behind Porto.
