Porto to San Isidro: time difference
San Isidro 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 17:42 5:42 PM San Isidro 14:42 2:42 PM You –:–
17:42 5:42 PM
Western European Standard Time · UTC+0
☀️ 07:12 · 🌙 17:26
14:42 2:42 PM
Argentina Standard Time · UTC-3
☀️ 05:49 · 🌙 19:28
·
−3 h
San Isidro is 3 h behind Porto.
When you, Porto and San Isidro 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 Isidro
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 Isidro |
|---|---|---|
| Local time | 17:42 | 14:42 |
| 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/Buenos Aires |
| Daylight saving | On standard time → UTC+1, Mar 28, 02:00 | Not observed |
| Sunrise | 07:12 | 05:49 |
| Sunset | 17:26 | 19:28 |
| Daylight | 10 h 14 min | 13 h 39 min |
| People on this clock | 231,828 | 45,190 |
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 Isidro: common questions
How far behind Porto is San Isidro?
San Isidro is 3 hours behind Porto: UTC−3 against UTC+0.
If it is 9:00 AM in Porto, what time is it in San Isidro?
At 9:00 AM in Porto, clocks in San Isidro show 6:00 AM.
What time is it in San Isidro at the end of the working day in Porto?
The working day in Porto ends at 6:00 PM; in San Isidro it is 3:00 PM at that moment.
When do working hours in Porto and in San Isidro overlap?
Working hours (9:00 AM–6:00 PM) overlap from 12:00 PM to 6:00 PM in Porto, which is 9:00 AM to 3:00 PM in San Isidro.
When does the date change in San Isidro compared with Porto?
The new day starts in San Isidro later: until 3:00 AM in Porto, it is still the previous day there. From 9:00 PM in San Isidro, Porto is already on the next day.
Does the time difference between Porto and San Isidro change?
Yes. The clocks change only in Porto. From March 28, 2027, San Isidro will be 4 hours behind Porto.
