Istanbul to Viseu: time difference
Viseu is 2 h behind Istanbul. 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.
Istanbul 10:53 10:53 AM Viseu 08:53 8:53 AM You –:–
10:53 10:53 AM
GMT+03:00 · UTC+3
☀️ 07:20 · 🌙 18:19
08:53 8:53 AM
Western European Summer Time · UTC+1
☀️ 07:47 · 🌙 18:47
·
−2 h
Viseu is 2 h behind Istanbul.
When you, Istanbul and Viseu are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇹🇷 Istanbul
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
🇵🇹 Viseu
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 21 9 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇹🇷 Istanbul | 🇵🇹 Viseu |
|---|---|---|
| Local time | 10:53 | 08:53 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | GMT+03:00 | Western European Summer Time |
| UTC offset | UTC+3 | UTC+1 |
| Offset from Istanbul | — | −2 h |
| IANA zone | Europe/Istanbul | Europe/Lisbon |
| Daylight saving | Not observed | On summer time → UTC+0, Oct 25, 01:00 |
| Sunrise | 07:20 | 07:47 |
| Sunset | 18:19 | 18:47 |
| Daylight | 10 h 59 min | 11 h |
| People on this clock | 15,701,602 | 99,561 |
Compare Istanbul with another city
More comparisons with Istanbul: the time zones next to it and the far side of the clock.
Big time differences
Istanbul and Viseu: common questions
How far behind Istanbul is Viseu?
Viseu is 2 hours behind Istanbul: UTC+1 against UTC+3.
If it is 9:00 AM in Istanbul, what time is it in Viseu?
At 9:00 AM in Istanbul, clocks in Viseu show 7:00 AM.
What time is it in Viseu at the end of the working day in Istanbul?
The working day in Istanbul ends at 6:00 PM; in Viseu it is 4:00 PM at that moment.
When do working hours in Istanbul and in Viseu overlap?
Working hours (9:00 AM–6:00 PM) overlap from 11:00 AM to 6:00 PM in Istanbul, which is 9:00 AM to 4:00 PM in Viseu.
When is it still the previous day in Viseu?
Until 2:00 AM in Istanbul it is still the previous day in Viseu. The other way round, from 10:00 PM in Viseu it is already the next day in Istanbul.
Is the time difference between Istanbul and Viseu the same all year?
No. Only Viseu switches to summer time, so the gap changes twice a year. From October 25, 2026, Viseu will be 3 hours behind Istanbul.
