Porto to San Antonio: time difference
San Antonio 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 10:18 10:18 AM San Antonio 07:18 7:18 AM You –:–
10:18 10:18 AM
Western European Standard Time · UTC+0
☀️ 07:12 · 🌙 17:26
07:18 7:18 AM
Paraguay Standard Time · UTC-3
☀️ 06:00 · 🌙 19:10
·
−3 h
San Antonio is 3 h behind Porto.
When you, Porto and San Antonio 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 Antonio
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 Antonio |
|---|---|---|
| Local time | 10:18 | 07:18 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Western European Standard Time | Paraguay Standard Time |
| UTC offset | UTC+0 | UTC-3 |
| Offset from Porto | — | −3 h |
| IANA zone | Europe/Lisbon | America/Asuncion |
| Daylight saving | On standard time → UTC+1, Mar 28, 02:00 | Not observed |
| Sunrise | 07:12 | 06:00 |
| Sunset | 17:26 | 19:10 |
| Daylight | 10 h 14 min | 13 h 10 min |
| People on this clock | 231,828 | 68,127 |
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 Antonio: common questions
What is the time difference between Porto and San Antonio?
San Antonio is 3 hours behind: it uses UTC−3, while Porto is on UTC+0.
If it is 9:00 AM in Porto, what time is it in San Antonio?
At 9:00 AM in Porto, clocks in San Antonio show 6:00 AM.
What time is it in San Antonio when it is 6:00 PM in Porto?
When it is 6:00 PM in Porto, it is 3:00 PM in San Antonio.
When is a good time to call San Antonio from Porto?
Between 12:00 PM and 6:00 PM in Porto – that is 9:00 AM to 3:00 PM in San Antonio – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in San Antonio?
Until 3:00 AM in Porto it is still the previous day in San Antonio. The other way round, from 9:00 PM in San Antonio it is already the next day in Porto.
Is the time difference between Porto and San Antonio the same all year?
No. Only Porto switches to summer time, so the gap changes twice a year. From March 28, 2027, San Antonio will be 4 hours behind Porto.
