What is WAT in ACST?

Australian Central Time is 8 hours 30 minutes ahead

West Africa Time is on UTC+1:00 and Australian Central Time is on UTC+9:30 right now. The gap changes during the year — see below.

Time in Lagos: 1:52:32 PM
Time in Adelaide: 10:22:32 PM
Difference: +8:30 h
Next clock change: October 4, 2026

Convert a time

WAT — West Africa Time

ACST — Australian Central Time

9:30 pm

ACST, Fri

When the difference changes

West Africa Time and Australian Central Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

Now – October 3, 2026Australian Central Time is 8 hours 30 minutes ahead
October 3, 2026 – April 3, 2027Australian Central Time is 9 hours 30 minutes ahead
April 3, 2027 – October 2, 2027Australian Central Time is 8 hours 30 minutes ahead
October 2, 2027 – onwardsAustralian Central Time is 9 hours 30 minutes ahead

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

West Africa Time

No clock changes

West Africa Time stays on WAT all year, so its offset from UTC never moves.

Australian Central Time

Sunday, October 4, 2026

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ACDT after that.

WAT to ACST conversion table

Every hour of Friday, September 25, 2026, converted from West Africa Time to Australian Central Time. 8 of the 24 hours fall on a different calendar day in Adelaide, which is marked.

12:00 am WAT: 8:30 am ACST
1:00 am WAT: 9:30 am ACST
2:00 am WAT: 10:30 am ACST
3:00 am WAT: 11:30 am ACST
4:00 am WAT: 12:30 pm ACST
5:00 am WAT: 1:30 pm ACST
6:00 am WAT: 2:30 pm ACST
7:00 am WAT: 3:30 pm ACST
8:00 am WAT: 4:30 pm ACST
9:00 am WAT: 5:30 pm ACST
10:00 am WAT: 6:30 pm ACST
11:00 am WAT: 7:30 pm ACST

12:00 pm WAT: 8:30 pm ACST
1:00 pm WAT: 9:30 pm ACST
2:00 pm WAT: 10:30 pm ACST
3:00 pm WAT: 11:30 pm ACST
4:00 pm WAT: 12:30 am ACST+1 day
5:00 pm WAT: 1:30 am ACST+1 day
6:00 pm WAT: 2:30 am ACST+1 day
7:00 pm WAT: 3:30 am ACST+1 day
8:00 pm WAT: 4:30 am ACST+1 day
9:00 pm WAT: 5:30 am ACST+1 day
10:00 pm WAT: 6:30 am ACST+1 day
11:00 pm WAT: 7:30 am ACST+1 day

Scheduling between the two

Working hours overlap from 9:00 am to 10:00 am WAT, which is 5:30 pm to 6:30 pm ACST. Anything inside that window falls in the normal working day at both ends.

West Africa Time (WAT) is used in Nigeria, Algeria, Angola and Cameroon

Australian Central Time (ACST) is used in South Australia and the Northern Territory, on a half-hour offset from the east coast