Time Difference

Surabaya vs Seoul Time Difference

Compare the current local time in Surabaya, Indonesia and Seoul, South Korea.

Live local timeDST awareUTC offsets

From

Surabaya

Indonesia

6:37 AM

Mon, Aug 17

UTC+7Asia/Jakarta

Difference

2 hours

Swap

Seoul

South Korea

8:37 AM

Mon, Aug 17

UTC+9Asia/Seoul

Current difference

Seoul is currently 1 hour 60 minutes ahead of Surabaya.

This difference is calculated using the current UTC offsets for both locations and automatically reflects daylight-saving changes.

24-hour comparison

Compare Surabaya and Seoul hour by hour

See how a full local day in Surabaya, Indonesia maps to Seoul, South Korea. TimeInOne automatically accounts for timezone offsets, date changes and daylight-saving transitions.

24-hour day

Best working-hours overlap

9:00 AM – 4:00 PM in Surabaya

corresponds to 11:00 AM – 6:00 PM in Seoul.

7 hours overlap

Surabaya

Asia/Jakarta

Seoul

Asia/Seoul

Availability

12:00 AM

Mon, Aug 17

2:00 AM

Mon, Aug 17

Night

1:00 AM

Mon, Aug 17

3:00 AM

Mon, Aug 17

Night

2:00 AM

Mon, Aug 17

4:00 AM

Mon, Aug 17

Night

3:00 AM

Mon, Aug 17

5:00 AM

Mon, Aug 17

Night

4:00 AM

Mon, Aug 17

6:00 AM

Mon, Aug 17

Night

5:00 AM

Mon, Aug 17

7:00 AM

Mon, Aug 17

Night

6:00 AM

Mon, Aug 17

8:00 AM

Mon, Aug 17

Night

7:00 AM

Mon, Aug 17

9:00 AM

Mon, Aug 17

Possible

8:00 AM

Mon, Aug 17

10:00 AM

Mon, Aug 17

Possible

9:00 AM

Mon, Aug 17

11:00 AM

Mon, Aug 17

Good overlap

10:00 AM

Mon, Aug 17

12:00 PM

Mon, Aug 17

Good overlap

11:00 AM

Mon, Aug 17

1:00 PM

Mon, Aug 17

Good overlap

12:00 PM

Mon, Aug 17

2:00 PM

Mon, Aug 17

Good overlap

1:00 PM

Mon, Aug 17

3:00 PM

Mon, Aug 17

Good overlap

2:00 PM

Mon, Aug 17

4:00 PM

Mon, Aug 17

Good overlap

3:00 PM

Mon, Aug 17

5:00 PM

Mon, Aug 17

Good overlap

4:00 PM

Mon, Aug 17

6:00 PM

Mon, Aug 17

Possible

5:00 PM

Mon, Aug 17

7:00 PM

Mon, Aug 17

Possible

6:00 PM

Mon, Aug 17

8:00 PM

Mon, Aug 17

Possible

7:00 PM

Mon, Aug 17

9:00 PM

Mon, Aug 17

Night

8:00 PM

Mon, Aug 17

10:00 PM

Mon, Aug 17

Night

9:00 PM

Mon, Aug 17

11:00 PM

Mon, Aug 17

Night

10:00 PM

Mon, Aug 17

12:00 AM

Next day

Tue, Aug 18

Night

11:00 PM

Mon, Aug 17

1:00 AM

Next day

Tue, Aug 18

Night

Working-hour labels use a general 9:00 AM–6:00 PM schedule. Individual schedules may differ.

On daylight-saving transition dates, a local day can contain 23 or 25 real hours instead of 24.

Call planning

Best time to call Seoul from Surabaya

Compare typical business hours in Surabaya, Indonesia and Seoul, South Korea to find a practical time for calls, meetings or international coordination.

Surabaya

9:37 AM – 4:37 PM

Indonesia

Best overlap

Seoul

11:37 AM – 6:37 PM

South Korea

The best time to call Seoul from Surabaya is between 9:37 AM and 4:37 PM in Surabaya. This corresponds to 11:37 AM – 6:37 PM in Seoul.

Other reasonable windows

Surabaya

7:37 AM – 9:37 AM

Seoul

9:37 AM – 11:37 AM

Surabaya

4:37 PM – 7:37 PM

Seoul

6:37 PM – 9:37 PM

Recommendations use typical 9:00 AM–6:00 PM business hours and a broader 7:00 AM–9:00 PM acceptable calling window. Individual schedules may differ.

Time difference explained

Surabaya and Seoul time difference explained

Current local-time relationship

Seoul is currently 2 hours ahead of Surabaya.

Surabaya uses Asia/Jakarta and currently has an offset of UTC+7. Seoul uses Asia/Seoul and currently has an offset of UTC+9.

Working-hours overlap

For a typical 9:00 AM–6:00 PM workday, the cities overlap from 9:00 AM to 4:00 PM in Surabaya, corresponding to 11:00 AM–6:00 PM in Seoul.

Because UTC offsets can change during the year, always check the selected date when planning an important international call or meeting.

Convert a specific time

Need more than the current difference?

Convert a specific date and local time between Surabaya and Seoul.

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Local clocks

Explore each city

Current time in Surabaya Current time in Seoul

FAQ

Surabaya to Seoul time difference FAQ

Common questions about the current time difference, UTC offsets, daylight-saving changes and practical calling hours between Surabaya and Seoul.

What is the time difference between Surabaya and Seoul?

The current time difference between Surabaya and Seoul is 2 hours. Seoul is currently 2 hours ahead of Surabaya.

Is Seoul ahead of or behind Surabaya?

Seoul is currently 2 hours ahead of Surabaya.

What time is it in Seoul when it is 9:00 AM in Surabaya?

Using the current UTC offsets, 9:00 AM in Surabaya corresponds to 11:00 AM in Seoul. The exact difference can change when daylight-saving rules change.

What is the best time to call Seoul from Surabaya?

Typical 9:00 AM–6:00 PM business hours overlap between 9:00 AM and 4:00 PM in Surabaya. This corresponds to 11:00 AM–6:00 PM in Seoul.

Can the time difference between Surabaya and Seoul change?

Yes. The time difference can change if Surabaya or Seoul changes its UTC offset because of daylight-saving or other local time-zone rules. TimeInOne uses the IANA zones Asia/Jakarta and Asia/Seoul for date-aware calculations.