What is ACST in WAT?
West Africa Time is 8 hours 30 minutes behind
Australian Central Time is on UTC+9:30 and West Africa Time is on UTC+1:00 right now. The gap changes during the year — see below.
- Time in Adelaide
- 10:22:36 PM
- Time in Lagos
- 1:52:36 PM
- Difference
- −8:30 h
- Next clock change
- October 4, 2026
Convert a time
WAT — West Africa Time
1:30 pm
WAT, Fri
When the difference changes
Australian Central Time and West Africa 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 4, 2026West Africa Time is 8 hours 30 minutes behind
- October 4, 2026 – April 4, 2027West Africa Time is 9 hours 30 minutes behind
- April 4, 2027 – October 3, 2027West Africa Time is 8 hours 30 minutes behind
- October 3, 2027 – onwardsWest Africa Time is 9 hours 30 minutes behind
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
Australian Central Time
Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ACDT after that.
West Africa Time
West Africa Time stays on WAT all year, so its offset from UTC never moves.
ACST to WAT conversion table
Every hour of Friday, September 25, 2026, converted from Australian Central Time to West Africa Time. 9 of the 24 hours fall on a different calendar day in Lagos, which is marked.
- 12:00 am ACST
- 3:30 pm WAT−1 day
- 1:00 am ACST
- 4:30 pm WAT−1 day
- 2:00 am ACST
- 5:30 pm WAT−1 day
- 3:00 am ACST
- 6:30 pm WAT−1 day
- 4:00 am ACST
- 7:30 pm WAT−1 day
- 5:00 am ACST
- 8:30 pm WAT−1 day
- 6:00 am ACST
- 9:30 pm WAT−1 day
- 7:00 am ACST
- 10:30 pm WAT−1 day
- 8:00 am ACST
- 11:30 pm WAT−1 day
- 9:00 am ACST
- 12:30 am WAT
- 10:00 am ACST
- 1:30 am WAT
- 11:00 am ACST
- 2:30 am WAT
- 12:00 pm ACST
- 3:30 am WAT
- 1:00 pm ACST
- 4:30 am WAT
- 2:00 pm ACST
- 5:30 am WAT
- 3:00 pm ACST
- 6:30 am WAT
- 4:00 pm ACST
- 7:30 am WAT
- 5:00 pm ACST
- 8:30 am WAT
- 6:00 pm ACST
- 9:30 am WAT
- 7:00 pm ACST
- 10:30 am WAT
- 8:00 pm ACST
- 11:30 am WAT
- 9:00 pm ACST
- 12:30 pm WAT
- 10:00 pm ACST
- 1:30 pm WAT
- 11:00 pm ACST
- 2:30 pm WAT
Scheduling between the two
There is no overlap between a nine-to-six working day in Adelaide and one in Lagos — the gap is too wide. A call has to sit early or late for one side. Early morning in Adelaide is the usual compromise, since that is late afternoon or evening in Lagos.
Australian Central Time (ACST) is used in South Australia and the Northern Territory, on a half-hour offset from the east coast
West Africa Time (WAT) is used in Nigeria, Algeria, Angola and Cameroon
Other conversions
- WAT to ACST
- ACST to UTC
- ACST to GMT
- ACST to EST
- ACST to CST
- ACST to MST
- ACST to PST
- ACST to AKST
- ACST to HST
- ACST to BST
- ACST to CET
- ACST to IST
- ACST to CST (China)
- ACST to JST
- ACST to AEST
- ACST to AST
- ACST to Mexico City
- ACST to BRT
- ACST to ART
- ACST to EET
- ACST to WET
- ACST to MSK
- ACST to TRT
- ACST to SAST
- ACST to EAT
- ACST to GST
- ACST to PKT
- ACST to ICT
- ACST to WIB
- ACST to SGT
- ACST to HKT
- ACST to KST
- ACST to PHT
- ACST to AWST
- ACST to NZST
- All zones