Singapore to Surabaya: time difference
Surabaya is 1 h behind Singapore. Live clocks for both, the working hours they share, and how each one sits against your own time.
−1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Singapore 10:05 10:05 AM Surabaya 09:05 9:05 AM You –:–
10:05 10:05 AM
Singapore Standard Time · UTC+8
☀️ 06:50 · 🌙 18:55
09:05 9:05 AM
Western Indonesia Time · UTC+7
☀️ 05:10 · 🌙 17:24
·
−1 h
Surabaya is 1 h behind Singapore.
When you, Singapore and Surabaya are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇸🇬 Singapore
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
🇮🇩 Surabaya
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 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇸🇬 Singapore | 🇮🇩 Surabaya |
|---|---|---|
| Local time | 10:05 | 09:05 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Singapore Standard Time | Western Indonesia Time |
| UTC offset | UTC+8 | UTC+7 |
| Offset from Singapore | — | −1 h |
| IANA zone | Asia/Singapore | Asia/Jakarta |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:50 | 05:10 |
| Sunset | 18:55 | 17:24 |
| Daylight | 12 h 6 min | 12 h 13 min |
| People on this clock | 5,535,002 | 2,765,487 |
Compare Singapore with another city
More comparisons with Singapore: the time zones next to it and the far side of the clock.
Big time differences
Singapore and Surabaya: common questions
How far behind Singapore is Surabaya?
Surabaya is 1 hour behind Singapore: UTC+7 against UTC+8.
What time is it in Surabaya when it is 9:00 AM in Singapore?
When it is 9:00 AM in Singapore, it is 8:00 AM in Surabaya.
What time is it in Surabaya when it is 6:00 PM in Singapore?
When it is 6:00 PM in Singapore, it is 5:00 PM in Surabaya.
Is there a time when both Singapore and Surabaya are at work?
Yes: from 10:00 AM to 6:00 PM in Singapore (9:00 AM to 5:00 PM in Surabaya), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Surabaya compared with Singapore?
The new day starts in Surabaya later: until 1:00 AM in Singapore, it is still the previous day there. From 11:00 PM in Surabaya, Singapore is already on the next day.
Is the time difference between Singapore and Surabaya the same all year?
Yes. Neither Singapore nor Surabaya switches to summer time, so the gap is always 1 hour.
