Lisbon to ACST
+8h 30mLisbon
WESTSOURCEACST
ACSTGreen rows indicate typical business hours (9 AM - 5 PM)
WEST and ACST on the World Map
The map below highlights the WEST (Western European Time) and ACST (Australian Central Standard Time) timezone regions across the globe.
WET – Western European Time
UTC+00:00Western European Time (WET) is the time zone for Portugal, Morocco, and the Canary Islands, same as UTC+00:00.
- •Portugal is the only mainland European country in the WET time zone.
- •The Canary Islands are on WET despite being part of Spain (which uses CET).
- •WET is identical to GMT and UTC+00:00.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
About Lisbon
WikipediaLisbon operates on Western European Time (WET/WEST), same as London. As Portugal's capital and an emerging tech hub, Lisbon bridges European and Atlantic time zones.
Lisbon has 300 days of sunshine per year and is a major startup hub in Europe.
Understanding the +8h 30m Gap: Lisbon vs ACST
Lisbon runs on Western European Summer Time (WEST) at UTC+01:00, currently observing daylight saving time. ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. That puts Lisbon 8 hours 30 minutes ahead of ACST — a difference of +8h 30m at the current offsets.
In practice, when it is 9:00 AM in Lisbon it is 5:30 PM in ACST. Midnight in Lisbon is 8:30 AM in ACST.Lisbon observes daylight saving time while ACST does not, so the gap narrows or widens by an hour part of the year.
Lisbon to ACST time conversion table
| Lisbon (WEST) | ACST (ACST) | Day |
|---|---|---|
| 12:00 AM | 8:30 AM | same day |
| 6:00 AM | 2:30 PM | same day |
| 7:00 AM | 3:30 PM | same day |
| 8:00 AM | 4:30 PM | same day |
| 9:00 AM | 5:30 PM | same day |
| 12:00 PM | 8:30 PM | same day |
| 3:00 PM | 11:30 PM | same day |
| 5:00 PM | 1:30 AM | next day |
| 6:00 PM | 2:30 AM | next day |
| 9:00 PM | 5:30 AM | next day |
Why people convert Lisbon to ACST time
- Scheduling a call from Lisbon to ACST: a 10:00 AM start in Lisbon lands at 6:30 PM in ACST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +8h 30m gap: Lisbon and ACST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in ACST is 5:30 PM in Lisbon.
- Booking travel or deliveries: tracking ACST local time against Lisbon keeps pickup windows and arrival estimates honest across the +8h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM WEST" is unambiguous; "3 PM" across a +8h 30m gap is not.
- With a +8h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week Lisbon takes the early slot, the next week ACST does.
- Lisbon: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +8h 30m gap.
About WET (Western European Time)
Western European Time (WET) is used in Portugal, the Canary Islands (Spain), Morocco, and several other locations. It is equivalent to GMT/UTC. During summer, Portugal and the Canary Islands switch to WEST (Western European Summer Time, UTC+01:00).
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
Best time to call between Lisbon and ACST
With a +8h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. ACST opens at 9:00 AM ACST, which is 5:30 PM in Lisbon, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Lisbon and ACST have no shared working hours because of the +8h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
Lisbon is 8 hours 30 minutes ahead of ACST (WEST UTC+01:00 → ACST UTC+09:30). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Lisbon
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Lisbon and ACST?
Lisbon (WEST, UTC+01:00) is 8 hours 30 minutes ahead of ACST (ACST, UTC+09:30). The gap is currently +8h 30m.
How do I convert Lisbon time to ACST time?
Add +8h 30m to Lisbon local time. For example, 9:00 AM in Lisbon is 5:30 PM in ACST.
What time is it in ACST right now?
ACST uses ACST at UTC+09:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h 30m offset from Lisbon.
What is the best time to call ACST from Lisbon?
There is no shared working-hours window because of the +8h 30m gap. The closest option is 1:00 PM in Lisbon, which is 9:30 PM in ACST.
Which is ahead, Lisbon or ACST?
Lisbon is 8 hours 30 minutes ahead of ACST. When it is 12:00 PM in Lisbon it is 8:30 PM in ACST.
Do Lisbon and ACST use different time zones?
Lisbon (Portugal) uses WEST at UTC+01:00, while ACST uses ACST at UTC+09:30. The IANA identifiers are Europe/Lisbon and Australia/Adelaide.
Does daylight saving time affect the Lisbon–ACST difference?
Yes at the moment: Lisbon is on daylight saving time and ACST is not, so the +8h 30m gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Lisbon's time zone?
WEST also covers Lisbon, Porto, Casablanca, Las Palmas, Funchal, Rabat.
Which countries use WEST, Lisbon's zone?
WEST is used in Portugal, Spain (Canary Islands), Morocco, Western Sahara.
Is there a day difference between Lisbon and ACST?
Not normally. The +8h 30m gap only pushes the date over for late-evening times.
What is the time difference between Lisbon and ACST?
ACST is +8h 30m from Lisbon.
What timezone is Lisbon in?
Lisbon operates on Western European Time (WET/WEST), same as London. As Portugal's capital and an emerging tech hub, Lisbon bridges European and Atlantic time zones.
What timezone is ACST in?
ACST operates on its local timezone.
What are the business hours in Lisbon?
Standard business hours in Lisbon are 9:00 AM - 6:00 PM WET.
Which countries use WET (Western European Time)?
WET is used in Portugal, Spain (Canary Islands), Morocco, Western Sahara.
Does WET observe daylight saving time?
Yes, WET switches to WEST during summer months.
What are some interesting facts about WET?
Portugal is the only mainland European country in the WET time zone. The Canary Islands are on WET despite being part of Spain (which uses CET).
Which cities are in the ACST timezone?
Major cities in the ACST timezone include Adelaide, Darwin, Alice Springs, Mount Gambier.
What is the UTC offset for ACST?
Australian Central Standard Time (ACST) is at UTC+09:30. During daylight saving time, it shifts to ACDT.
What should I know about the ACST timezone?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
When is it midnight in Lisbon, what time is it in ACST?
When it is 12:00 AM (midnight) in Lisbon (WET), it is +8h 30m later in ACST (ACST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Lisbon time conversions
- lisbon to wet
- lisbon to portugal
- lisbon to london
- lisbon to dublin
- lisbon to paris
- lisbon to berlin
- lisbon to amsterdam
- lisbon to madrid
- lisbon to rome
- lisbon to zurich
- lisbon to stockholm
- lisbon to moscow
- lisbon to istanbul
- lisbon to warsaw
- lisbon to new york
- lisbon to dubai
- lisbon to tokyo
- lisbon to singapore
- lisbon to sydney
- lisbon to los angeles
- lisbon to delhi
- lisbon to mumbai
- lisbon to hong kong
- lisbon to toronto
- lisbon to kathmandu
- new york to lisbon
- london to lisbon
- dubai to lisbon
- tokyo to lisbon
- singapore to lisbon
- sydney to lisbon
- los angeles to lisbon
- paris to lisbon
- delhi to lisbon
- mumbai to lisbon
- berlin to lisbon
See every conversion from Lisbon →·See every conversion from ACST →