The best time to post on Instagram in Australia is Wednesday at 12 pm or 6 pm, and Thursday at 9 am, in your followers’ local time. If your audience is spread across the country, schedule on Sydney time (AEST or AEDT) and favour the 6 pm to 8 pm slots, which still land in the afternoon or evening everywhere from Brisbane to Perth. For planning a month of posts around these times, I compared the best social media calendar tools. Friday and Saturday are the weakest days.
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| Day | Best time (local) | Backup slot | Strength |
|---|---|---|---|
| Monday | 7 pm | 6 pm or 8 pm | Moderate |
| Tuesday | 7 pm | 3 pm to 5 pm | High |
| Wednesday | 12 pm | 6 pm | Best day |
| Thursday | 9 am | 12 pm to 2 pm | Very high |
| Friday | 9 pm to 10 pm | 6 am | Weak |
| Saturday | 9 pm | 8 pm | Weak |
| Sunday | 9 pm | 8 pm | Moderate |
The time zone problem, solved
Most “best time” articles ignore the thing that makes Australia hard. There are three standard time zones, and in summer there are five different clock times, because New South Wales, Victoria, South Australia, Tasmania and the ACT use daylight saving while Queensland, Western Australia and the Northern Territory don’t.
Here’s what one 6 pm Sydney post looks like around the country.
| City | Winter (Apr to early Oct) | Summer (daylight saving) |
|---|---|---|
| Sydney, Melbourne, Canberra, Hobart | 6:00 pm | 6:00 pm |
| Brisbane | 6:00 pm | 5:00 pm |
| Adelaide | 5:30 pm | 5:30 pm |
| Darwin | 5:30 pm | 4:30 pm |
| Perth | 4:00 pm | 3:00 pm |
Since most Australians live in the eastern states, Sydney time is the sensible default for a national brand. A 6 pm or 7 pm Sydney post hits the east coast evening peak and reaches Perth in mid to late afternoon, which is still a reasonable slot. The Wednesday noon post is the one that travels badly. At 12 pm in Sydney it’s 9 am or 10 am in Perth, a weak hour there. If Western Australia matters to you, post the Wednesday lunchtime content at 1 pm Sydney time, or run a separate Perth schedule.
Local businesses can ignore all of this. A cafe in Fremantle should just use the first table on Perth time.
Where the times come from
I haven’t found a large Australia-only study, so these are the three biggest global datasets, each reported in the viewer’s local time. Buffer’s 9.6 million posts give the specific slots in the table. Sprout Social’s 2 billion engagements show Tuesday 1 pm to 7 pm and Wednesday 12 pm to 9 pm as the peaks. Hootsuite’s million-plus posts from 118 countries favour Monday and Tuesday from 3 pm. They agree that midweek wins, evenings beat mornings and Thursday morning is the exception.
Australian habits worth testing against
Australians start early. Gyms are busy at 5:30 am and tradies are on site by 7, so fitness, coffee and trade accounts should test 6 am to 7 am posts, a slot the global data only rates on Fridays. I’d expect it to do better here than the averages suggest.
Summer changes the evening. From December to February, with light until 8:30 pm and people at the beach or a barbecue, the after-work scroll moves later. Try 8 pm to 9:30 pm for Reels in summer and come back to 6 pm to 8 pm in winter. And the week between Christmas and New Year is its own world: most of the country is on holiday, routines vanish, and daytime posts do far better than usual.
Followers across the Tasman are two hours ahead of Sydney. There’s a separate guide for posting times in New Zealand.
Check where your followers actually are
Before you pick a time zone, look at the data. In the Instagram app, open the professional dashboard, tap your follower total, and you’ll see top cities plus an active-times chart. If 40% of your followers are in Perth, Sydney time is the wrong default. Instagram’s Adam Mosseri suggests posting 30 to 60 minutes before your audience’s peak. Set your scheduling tool to the right city (Australia/Sydney, Australia/Perth) so it handles daylight saving for you, and review reach by hour once a month in your analytics.