San Juan to Porto: time difference
Porto is 3 h ahead of San Juan. Live clocks for both, the working hours they share, and how each one sits against your own time.
🇵🇹 Porto, Portugal
33
- Western European Standard Time
- UTC+0
- Twilight
☀️ 07:12 · 🌙 17:26 · 10 h 14 min
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
San Juan 15:17 3:17 PM Porto 18:17 6:17 PM You –:–
15:17 3:17 PM
Argentina Standard Time · UTC-3
☀️ 06:34 · 🌙 20:03
18:17 6:17 PM
Western European Standard Time · UTC+0
☀️ 07:12 · 🌙 17:26
·
+3 h
Porto is 3 h ahead of San Juan.
When you, San Juan and Porto are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 San Juan
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
🇵🇹 Porto
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 0 12 AM 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 San Juan | 🇵🇹 Porto |
|---|---|---|
| Local time | 15:17 | 18:17 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Argentina Standard Time | Western European Standard Time |
| UTC offset | UTC-3 | UTC+0 |
| Offset from San Juan | — | +3 h |
| IANA zone | America/Argentina/San Juan | Europe/Lisbon |
| Daylight saving | Not observed | On standard time → UTC+1, Mar 28, 02:00 |
| Sunrise | 06:34 | 07:12 |
| Sunset | 20:03 | 17:26 |
| Daylight | 13 h 29 min | 10 h 14 min |
| People on this clock | 522,029 | 231,828 |
Compare San Juan with another city
More comparisons with San Juan: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Juan and Porto: common questions
What is the time difference between San Juan and Porto?
Porto is 3 hours ahead: it uses UTC+0, while San Juan is on UTC−3.
If it is 9:00 AM in San Juan, what time is it in Porto?
At 9:00 AM in San Juan, clocks in Porto show 12:00 PM.
What time is it in Porto when it is 6:00 PM in San Juan?
When it is 6:00 PM in San Juan, it is 9:00 PM in Porto.
Is there a time when both San Juan and Porto are at work?
Yes: from 9:00 AM to 3:00 PM in San Juan (12:00 PM to 6:00 PM in Porto), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Porto compared with San Juan?
The new day starts in Porto earlier: at 9:00 PM in San Juan it is already midnight there. Until 3:00 AM in Porto, San Juan is still on the previous day.
Is the time difference between San Juan and Porto the same all year?
No. Only Porto switches to summer time, so the gap changes twice a year. From March 28, 2027, Porto will be 4 hours ahead of San Juan.
