Time Difference

Perth vs Surabaya Time Difference

Compare the current local time in Perth, Australia and Surabaya, Indonesia.

Live local timeDST awareUTC offsets

From

Perth

Australia

7:31 AM

Mon, Aug 17

UTC+8Australia/Perth

Difference

1 hour

Swap

Surabaya

Indonesia

6:31 AM

Mon, Aug 17

UTC+7Asia/Jakarta

Current difference

Surabaya is currently 1 hour behind Perth.

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

24-hour comparison

Compare Perth and Surabaya hour by hour

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

24-hour day

Best working-hours overlap

10:00 AM – 6:00 PM in Perth

corresponds to 9:00 AM – 5:00 PM in Surabaya.

8 hours overlap

Perth

Australia/Perth

Surabaya

Asia/Jakarta

Availability

12:00 AM

Mon, Aug 17

11:00 PM

Previous day

Sun, Aug 16

Night

1:00 AM

Mon, Aug 17

12:00 AM

Mon, Aug 17

Night

2:00 AM

Mon, Aug 17

1:00 AM

Mon, Aug 17

Night

3:00 AM

Mon, Aug 17

2:00 AM

Mon, Aug 17

Night

4:00 AM

Mon, Aug 17

3:00 AM

Mon, Aug 17

Night

5:00 AM

Mon, Aug 17

4:00 AM

Mon, Aug 17

Night

6:00 AM

Mon, Aug 17

5:00 AM

Mon, Aug 17

Night

7:00 AM

Mon, Aug 17

6:00 AM

Mon, Aug 17

Night

8:00 AM

Mon, Aug 17

7:00 AM

Mon, Aug 17

Possible

9:00 AM

Mon, Aug 17

8:00 AM

Mon, Aug 17

Possible

10:00 AM

Mon, Aug 17

9:00 AM

Mon, Aug 17

Good overlap

11:00 AM

Mon, Aug 17

10:00 AM

Mon, Aug 17

Good overlap

12:00 PM

Mon, Aug 17

11:00 AM

Mon, Aug 17

Good overlap

1:00 PM

Mon, Aug 17

12:00 PM

Mon, Aug 17

Good overlap

2:00 PM

Mon, Aug 17

1:00 PM

Mon, Aug 17

Good overlap

3:00 PM

Mon, Aug 17

2:00 PM

Mon, Aug 17

Good overlap

4:00 PM

Mon, Aug 17

3:00 PM

Mon, Aug 17

Good overlap

5:00 PM

Mon, Aug 17

4:00 PM

Mon, Aug 17

Good overlap

6:00 PM

Mon, Aug 17

5:00 PM

Mon, Aug 17

Possible

7:00 PM

Mon, Aug 17

6:00 PM

Mon, Aug 17

Possible

8:00 PM

Mon, Aug 17

7:00 PM

Mon, Aug 17

Possible

9:00 PM

Mon, Aug 17

8:00 PM

Mon, Aug 17

Night

10:00 PM

Mon, Aug 17

9:00 PM

Mon, Aug 17

Night

11:00 PM

Mon, Aug 17

10:00 PM

Mon, Aug 17

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 Surabaya from Perth

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

Perth

10:31 AM – 6:31 PM

Australia

Best overlap

Surabaya

9:31 AM – 5:31 PM

Indonesia

The best time to call Surabaya from Perth is between 10:31 AM and 6:31 PM in Perth. This corresponds to 9:31 AM – 5:31 PM in Surabaya.

Other reasonable windows

Perth

8:31 AM – 10:31 AM

Surabaya

7:31 AM – 9:31 AM

Perth

6:31 PM – 9:31 PM

Surabaya

5:31 PM – 8:31 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

Perth and Surabaya time difference explained

Current local-time relationship

Surabaya is currently 1 hour behind Perth.

Perth uses Australia/Perth and currently has an offset of UTC+8. Surabaya uses Asia/Jakarta and currently has an offset of UTC+7.

Working-hours overlap

For a typical 9:00 AM–6:00 PM workday, the cities overlap from 10:00 AM to 6:00 PM in Perth, corresponding to 9:00 AM–5:00 PM in Surabaya.

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 Perth and Surabaya.

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Local clocks

Explore each city

Current time in Perth Current time in Surabaya

FAQ

Perth to Surabaya time difference FAQ

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

What is the time difference between Perth and Surabaya?

The current time difference between Perth and Surabaya is 1 hour. Surabaya is currently 1 hour behind Perth.

Is Surabaya ahead of or behind Perth?

Surabaya is currently 1 hour behind Perth.

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

Using the current UTC offsets, 9:00 AM in Perth corresponds to 8:00 AM in Surabaya. The exact difference can change when daylight-saving rules change.

What is the best time to call Surabaya from Perth?

Typical 9:00 AM–6:00 PM business hours overlap between 10:00 AM and 6:00 PM in Perth. This corresponds to 9:00 AM–5:00 PM in Surabaya.

Can the time difference between Perth and Surabaya change?

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