Porto to Altos: time difference
Altos is 3 h behind Porto. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Porto 22:05 10:05 PM Altos 19:05 7:05 PM You –:–
22:05 10:05 PM
Western European Standard Time · UTC+0
☀️ 07:11 · 🌙 17:27
19:05 7:05 PM
Paraguay Standard Time · UTC-3
☀️ 05:59 · 🌙 19:08
·
−3 h
Altos is 3 h behind Porto.
When you, Porto and Altos 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
🇵🇾 Altos
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 | 🇵🇾 Altos |
|---|---|---|
| Local time | 22:05 | 19:05 |
| Local date | Thursday, November 5, 2026 | Thursday, November 5, 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 | 07:11 | 05:59 |
| Sunset | 17:27 | 19:08 |
| Daylight | 10 h 16 min | 13 h 9 min |
| People on this clock | 231,828 | 4,763 |
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 Altos: common questions
What is the time difference between Porto and Altos?
Altos is 3 hours behind: it uses UTC−3, while Porto is on UTC+0.
What time is it in Altos when it is 9:00 AM in Porto?
When it is 9:00 AM in Porto, it is 6:00 AM in Altos.
What time is it in Altos when it is 6:00 PM in Porto?
When it is 6:00 PM in Porto, it is 3:00 PM in Altos.
When is a good time to call Altos from Porto?
Between 12:00 PM and 6:00 PM in Porto – that is 9:00 AM to 3:00 PM in Altos – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Altos?
Until 3:00 AM in Porto it is still the previous day in Altos. The other way round, from 9:00 PM in Altos it is already the next day in Porto.
Does the time difference between Porto and Altos change?
Yes. The clocks change only in Porto. From March 28, 2027, Altos will be 4 hours behind Porto.
