What is WAT in ACST?

Australian Central Time is 9 hours 30 minutes ahead

West Africa Time is on UTC+1:00 and Australian Central Time is on UTC+10:30 right now. Australian Central Time is on daylight saving, so its clocks read ACDT. The gap changes during the year — see below.

Convert a time

WAT — West Africa Time

ACDT — Australian Central Time

8:30 pm

ACDT, Fri

Time in Lagos: 11:00:46 AM
Time in Adelaide: 8:30:46 PM
Difference: +9:30 h
Next clock change: April 4, 2027

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 – 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, April 4, 2027

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

WAT to ACST conversion table

Every hour of Friday, November 13, 2026, converted from West Africa Time to Australian Central Time. 9 of the 24 hours fall on a different calendar day in Adelaide, which is marked.

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

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

Scheduling between the two

There is no overlap between a nine-to-six working day in Lagos and one in Adelaide — the gap is too wide. A call has to sit early or late for one side. Early morning in Lagos is the usual compromise, since that is late afternoon or evening in Adelaide.

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

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