Perth to London
-8hPerth
AWSTSOURCELondon
GMTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and GMT on the World Map
The map below highlights the AWST (Australian Western Standard Time) and GMT (Greenwich Mean Time) timezone regions across the globe.
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
About Perth
WikipediaPerth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
Perth shares the same timezone (UTC+8) as Singapore and Hong Kong.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
London was the first city to have an underground railway, opening in 1863.
Everything You Need to Know About Perth and London Time
Perth, Australia operates on the Australian Western Standard Time (UTC+08:00). London, UK uses Greenwich Mean Time (UTC+00:00).
The time difference between Perth and London is 480 minutes (+8h). When it's noon in Perth, it's 04:00 AM in London.
Why Convert Perth to London Time?
The time difference of 8 hours between Perth and London can significantly impact business operations and personal communication. By using this converter, you can easily find the overlapping business hours and schedule your interactions when both parties are available.
Remember: Daylight Saving Time changes can affect the time difference between Perth and London. Always double-check the current offset before scheduling important events.
About AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best Time to Call Between Perth and London
If you want to reach someone in London during standard business hours (9 AM – 5 PM GMT), the best time to call from Perth would be:
- London 9:00 AM = Perth 05:00 PM
- London 12:00 PM = Perth 08:00 PM
- London 5:00 PM = Perth 01:00 AM
Business Hours Overlap
Perth and London have a partial business hours overlap. The best window for meetings and calls is when both locations are in their working hours.
In summary, the -8h time difference between Perth and London means you need to plan carefully. Use this page as your go-to reference for quick and accurate time conversions.
🕐 Daylight Saving Time Info
Perth
Does not observe DST
London
❄ Currently in Standard Time
Standard: UTC+00:00 · DST: UTC+01:00
Clocks spring forward on Sun, Mar 29, 2026
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 Perth and London?
London is -8h from Perth.
What timezone is Perth in?
Perth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
What timezone is London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What are the business hours in Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What is the best time to schedule a call between Perth and London?
The best overlap for a call is when both cities are in business hours. Perth works 9:00 AM - 5:00 PM AWST and London works 9:00 AM - 5:00 PM GMT (-8h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Perth and London?
Perth uses AUD (A$) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Perth and London compare in size?
Perth has a population of approximately 2.1 million (metro: 2.2 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Perth and London?
Perth is known for Kings Park, Perth Mint, Elizabeth Quay. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Perth and London have stock exchanges?
Yes. Perth has the ASX (via Sydney) and London has the LSE (London Stock Exchange). The -8h time difference affects trading hour overlaps between these exchanges.
Which countries use AWST (Australian Western Standard Time)?
AWST is used in Australia (Western Australia).
Does AWST observe daylight saving time?
No, AWST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about AWST?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in Perth, what time is it in London?
When it is 12:00 AM (midnight) in Perth (AWST), it is -8h later in London (GMT).
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