Porto to Niteroi: time difference
Niteroi 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 13:06 1:06 PM Niteroi 10:06 10:06 AM You –:–
13:06 1:06 PM
Western European Standard Time · UTC+0
☀️ 07:12 · 🌙 17:26
10:06 10:06 AM
Brasilia Standard Time · UTC-3
☀️ 05:05 · 🌙 18:08
·
−3 h
Niteroi is 3 h behind Porto.
When you, Porto and Niteroi 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
🇧🇷 Niteroi
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 | 🇧🇷 Niteroi |
|---|---|---|
| Local time | 13:06 | 10:06 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Western European Standard Time | Brasilia Standard Time |
| UTC offset | UTC+0 | UTC-3 |
| Offset from Porto | — | −3 h |
| IANA zone | Europe/Lisbon | America/Sao Paulo |
| Daylight saving | On standard time → UTC+1, Mar 28, 02:00 | Not observed |
| Sunrise | 07:12 | 05:05 |
| Sunset | 17:26 | 18:08 |
| Daylight | 10 h 14 min | 13 h 3 min |
| People on this clock | 231,828 | 481,749 |
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 Niteroi: common questions
What is the time difference between Porto and Niteroi?
Niteroi 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 Niteroi?
At 9:00 AM in Porto, clocks in Niteroi show 6:00 AM.
What time is it in Niteroi when it is 6:00 PM in Porto?
When it is 6:00 PM in Porto, it is 3:00 PM in Niteroi.
Is there a time when both Porto and Niteroi are at work?
Yes: from 12:00 PM to 6:00 PM in Porto (9:00 AM to 3:00 PM in Niteroi), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Niteroi compared with Porto?
The new day starts in Niteroi later: until 3:00 AM in Porto, it is still the previous day there. From 9:00 PM in Niteroi, Porto is already on the next day.
Does the time gap between Porto and Niteroi change during the year?
Yes – daylight saving time is used in Porto but not in Niteroi. From March 28, 2027, Niteroi will be 4 hours behind Porto.
