Portsmouth to Istanbul: time difference
Istanbul is 2 h ahead of Portsmouth. 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.
Portsmouth 22:15 10:15 PM Istanbul 00:15 12:15 AM You –:–
22:15 10:15 PM
British Summer Time · UTC+1
☀️ 07:31 · 🌙 18:10
00:15 12:15 AM
GMT+03:00 · UTC+3
☀️ 07:18 · 🌙 18:22
·
+2 h
Istanbul is 2 h ahead of Portsmouth.
When you, Portsmouth and Istanbul are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇧 Portsmouth
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
🇹🇷 Istanbul
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 0 12 AM 1 1 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 Portsmouth | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 22:15 | 00:15 |
| Local date | Saturday, October 17, 2026 | Sunday, October 18, 2026 |
| Time zone | British Summer Time | GMT+03:00 |
| UTC offset | UTC+1 | UTC+3 |
| Offset from Portsmouth | — | +2 h |
| IANA zone | Europe/London | Europe/Istanbul |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:31 | 07:18 |
| Sunset | 18:10 | 18:22 |
| Daylight | 10 h 39 min | 11 h 5 min |
| People on this clock | 198,974 | 15,701,602 |
Compare Portsmouth with another city
More comparisons with Portsmouth: the time zones next to it and the far side of the clock.
Big time differences
Portsmouth and Istanbul: common questions
How far ahead of Portsmouth is Istanbul?
Istanbul is 2 hours ahead of Portsmouth: UTC+3 against UTC+1.
If it is 9:00 AM in Portsmouth, what time is it in Istanbul?
At 9:00 AM in Portsmouth, clocks in Istanbul show 11:00 AM.
What time is it in Istanbul at the end of the working day in Portsmouth?
The working day in Portsmouth ends at 6:00 PM; in Istanbul it is 8:00 PM at that moment.
Is there a time when both Portsmouth and Istanbul are at work?
Yes: from 9:00 AM to 4:00 PM in Portsmouth (11:00 AM to 6:00 PM in Istanbul), the working days (9:00 AM–6:00 PM) overlap.
When is it already the next day in Istanbul?
From 10:00 PM in Portsmouth it is already the next day in Istanbul. The other way round, until 2:00 AM in Istanbul it is still the previous day in Portsmouth.
Does the time gap between Portsmouth and Istanbul change during the year?
Yes – daylight saving time is used in Portsmouth but not in Istanbul. From October 25, 2026, Istanbul will be 3 hours ahead of Portsmouth.
