San Isidro to Porto: time difference
Porto is 3 h ahead of San Isidro. 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.
San Isidro 08:13 8:13 AM Porto 11:13 11:13 AM You –:–
08:13 8:13 AM
Argentina Standard Time · UTC-3
☀️ 05:49 · 🌙 19:28
11:13 11:13 AM
Western European Standard Time · UTC+0
☀️ 07:12 · 🌙 17:26
·
+3 h
Porto is 3 h ahead of San Isidro.
When you, San Isidro 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 Isidro
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 Isidro | 🇵🇹 Porto |
|---|---|---|
| Local time | 08:13 | 11:13 |
| 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 Isidro | — | +3 h |
| IANA zone | America/Argentina/Buenos Aires | Europe/Lisbon |
| Daylight saving | Not observed | On standard time → UTC+1, Mar 28, 02:00 |
| Sunrise | 05:49 | 07:12 |
| Sunset | 19:28 | 17:26 |
| Daylight | 13 h 39 min | 10 h 14 min |
| People on this clock | 45,190 | 231,828 |
Compare San Isidro with another city
More comparisons with San Isidro: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Isidro and Porto: common questions
How far ahead of San Isidro is Porto?
Porto is 3 hours ahead of San Isidro: UTC+0 against UTC−3.
If it is 9:00 AM in San Isidro, what time is it in Porto?
At 9:00 AM in San Isidro, clocks in Porto show 12:00 PM.
What time is it in Porto at the end of the working day in San Isidro?
The working day in San Isidro ends at 6:00 PM; in Porto it is 9:00 PM at that moment.
When do working hours in San Isidro and in Porto overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 3:00 PM in San Isidro, which is 12:00 PM to 6:00 PM in Porto.
When is it already the next day in Porto?
From 9:00 PM in San Isidro it is already the next day in Porto. The other way round, until 3:00 AM in Porto it is still the previous day in San Isidro.
Is the time difference between San Isidro 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 Isidro.
