The best time to post on Instagram on Wednesday, from 815 posts

Buffer calls Wednesday the best day of the week to post on Instagram, and Sprout Social says it "represents the peak of user activity." In this sample, Wednesday came last of the seven days, and no Wednesday hour stood out.

The crawl ran on September 22, 2026. Of 5,734 posts from 171 public Instagram accounts, 815 went out on a Wednesday, from 158 of the accounts. Each post was scored as its likes divided by its own account's median likes, so a two-million-follower account and a two-thousand-follower account count the same. Scored that way, Wednesday's smoothed curve runs from 0.84x at 7pm to 1.07x at 1am, and it sits under the seven-day curve for most of the afternoon and evening.

At a glance

What is the best time to post on Instagram on Wednesday?

No Wednesday hour is clearly the best time to post on Instagram: the highest Wednesday blocks only matched an account's normal post. 8pm to midnight ET scored 1.01x on 75 posts from 42 accounts, and midnight to 4am scored 1.01x on 90 posts. Every other block sat under normal.

The top block on paper, 8pm to midnight, is also the one where the fewest posts beat their own account's median: 39%. A few strong posts carry its average, and against the rest of Wednesday it's 1.09x, interval 0.79 to 1.45. The raw 11pm hour scored 1.30x on 31 posts, and the 8pm and 9pm hours scored 0.74x and 0.79x on 16 and 8.

8am to noon is the steadiest Wednesday block. It scored 0.97x, just under normal, but 49% of its posts beat their account's median, the highest share of the day, and it's the one block where Wednesday did better than other days, at 1.03x. It's also when accounts post most: 33% of Wednesday posts went out between 8am and 1pm, and the busiest hour was 11am, with 8% of the day's posts.

There's no early-morning peak. Wednesday posts from 5am to 9am scored 1.02x the working day, interval 0.80 to 1.27, on 168 posts. Later names 3am, which falls in the midnight to 4am block at 1.01x, and SocialPilot names 7am to 9am, which straddles the 4am to 8am block at 0.91x and 8am to noon at 0.97x.

What would make this wrong: a Wednesday hour that really is better, hidden by thin cells. The evening blocks hold 86 and 75 posts, and their intervals run from well under normal to well over it. A larger crawl could move them. On these 815 posts, no Wednesday hour clears.

What is the worst time to post on Instagram on Wednesday?

The worst Wednesday block was noon to 4pm ET, at 0.85x an account's normal likes, on 182 posts from 73 accounts. Against the rest of Wednesday that's 0.89x, interval 0.75 to 1.04, so it falls just short of clearing.

The same block on the other six days scored 0.98x. Wednesday against those days is 0.87x, interval 0.75 to 1.01, again one point short. The smoothed curve sits between 0.88x and 0.90x from noon to 3pm, and the raw noon hour scored 0.82x on 44 posts.

Buffer names noon as the best time on Wednesday and says the midday spike is unusual for the week. Here Wednesday's midday ran under other days' midday, the opposite direction, though not by enough to clear.

The late afternoon doesn't rescue it. On the other six days, 4pm to 8pm was the best block of the day at 1.09x. On Wednesday it scored 0.94x, and the smoothed curve hits its low of 0.84x at 7pm. Wednesday evenings (6pm to midnight) ran 0.90x other days' evenings, interval 0.67 to 1.19, on 112 posts. That's the reverse of Friday, where the evening was an hour effect that cleared.

Read raw, the individual Wednesday hours bounce between 0.65x and 1.40x on cells of 8 to 63 posts, which is why the hour curve smooths each hour over its two neighbours on either side. Every smoothed window holds at least 81 posts. The 1am low of 0.65x raw comes from 19 posts, the 3am high of 1.40x from 22, and the thinnest cell, 9pm, has 8.

Is Wednesday a good day to post on Instagram?

Wednesday was the weakest day to post on Instagram in this sample, at 0.93x an account's normal likes, and it's about 12% under the weekend, a gap that clears. Monday was 0.95x, Tuesday 0.98x, Thursday 0.99x, Friday 0.98x, Saturday 1.04x, and Sunday 1.08x.

Whether the dip is real depends on what you compare it with:

The earlier Instagram study, on the same accounts and about 40% as many Wednesday posts, also had Wednesday as the lowest day, at 0.98x on 340 posts. Two samples put Wednesday last. In both, the gap to the other weekdays is a few points, small enough that a third sample could reorder them.

Split by account size, one tier carries most of the dip:

• Under 10k followers: Wednesday ran 0.98x the same accounts' other days, interval 0.85 to 1.13, on 317 Wednesday posts against 2,036
• 10k to 100k: 0.84x, interval 0.73 to 0.94, on 330 against 1,824
• 100k to 1M: 1.03x, interval 0.82 to 1.27, on 135 against 876
• Over 1M: 1.18x, interval 0.84 to 1.72, on 33 against 183, from 5 accounts

The 10k to 100k tier is the only cut that clears, and it's one of four, so it could be chance. If your account is that size, it's worth checking your own Wednesdays first.

What do Buffer, Sprout Social, Hootsuite, and Later say about Wednesday?

Three of the five big Instagram timing studies put Wednesday at or near the top of the week, and between them they name Wednesday hours from 3am to 11pm. Each row quotes the study's own page as fetched on October 1, 2026.

Buffer's top Wednesday time and the first four hours of Sprout's window fall in Wednesday's lowest block here. The only named times in a block that reached normal are Later's 3am, Sprout's 11pm, and the last hour of Sprout's window, 8pm to 9pm, all at 1.01x. Hootsuite's 5pm and Buffer's 6pm fall in the 4pm to 8pm block, which on Wednesday missed the evening lift the other days got.

On the day, this sample and Buffer, Sprout, and SocialPilot point opposite ways. They put Wednesday at the top, and here it's at the bottom, with a gap to the weekend that clears. Sprout's data covers three months of winter, from late November to late February.

The two methods can disagree without either being careless. The five studies pool engagement across many accounts, and Buffer, Sprout, Later, and SocialPilot say their times apply in the audience's own time zone. Pooled engagement can rise on a day when big or busy accounts post more, even if the typical account's Wednesday post does a little worse than its other posts. This study scores each post against its own account and reports every time in US Eastern. None of the five pages gives a post count or a margin of error for the hours it names.

How I measured it

This is the same crawl as the Friday, Monday, and Tuesday studies, cut for Wednesday. It ran on September 22, 2026 through one Instagram endpoint on AnyAPI, instagram.user_posts, in 657 calls, and cost $0.53. The Wednesday cut needed no new calls.

1. Start from the accounts already in the sample. The 211 accounts came from the earlier Instagram study, which found them through 40 creator-niche searches and picked them round-robin across four follower tiers.
2. Pull deeper. instagram.user_posts returns twelve posts per call with a timestamp and a like count, plus a cursor for the next page. Each account was paged up to four times, stopping early once a page reached back past the window. The median account contributed 38 posts.
3. Apply the cutoffs. Posts had to be published between 2025-09-22 and 2026-09-08, so every like count had at least 14 days to settle. Accounts needed five scorable posts. That dropped 1,969 posts as too recent or too old, 10 posts with zero likes, and 40 accounts that fell under five, leaving 171 accounts and 5,734 posts, published between 2025-09-23 and 2026-09-08. 158 of those accounts posted on a Wednesday.
4. Score each post against its own account. Divide each post's likes by that account's median likes over the window, and cap the result at 6x so one viral post counts once. 433 posts hit the cap, 61 of them on a Wednesday.
5. Bucket and average. Convert every timestamp to US Eastern. Group by weekday, by four-hour block, and by hour, and take the geometric mean of the scores in each group. Hourly values are smoothed over a five-hour window. Every interval in this post comes from resampling whole accounts 1,000 times.

Here's one page of the 2026-09-22 crawl, on one account in the sample:

curl -sS -X POST https://api.getanyapi.com/v1/run/instagram.user_posts \
  -H "Authorization: Bearer $ANYAPI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"handle":"_garden.ing"}'

{"output":{"data":{"posts":[{"id":"3988678296405120718","createdUtc":1789707527,"likes":804,"comments":217}],"nextCursor":"..."}},"costUsd":0.0008}

The sample: 69 accounts under 10k followers, 63 between 10k and 100k, 32 between 100k and 1M, and 7 over 1M. The typical account's typical post had 112 likes.

What are the limits of this data?

This Instagram study measures likes only, in US Eastern time, on a convenience sample of 171 public accounts and 815 Wednesday posts.

• Likes only. Nothing here speaks to reach, saves, shares, comments, or follower growth, and Instagram's ranking leans on sends and saves more than likes.
• US Eastern for everyone. Accounts were found globally and no account was mapped to its audience's time zone. During daylight time, Wednesday noon in New York is 6pm in Berlin, and Wednesday 7pm in New York is Thursday morning in Tokyo.
• Thin evening cells. The two evening blocks hold 86 and 75 posts, and the raw 9pm hour holds 8. Only a larger crawl would settle the evening.
• Observational. Content, format, and promotion all confound this. An account that saves its best post for the weekend and fills midweek with lighter ones makes Wednesday look weak.
• Four tier cuts. One of the four clears, which is about what chance alone can produce. Treat the 10k to 100k result as a lead to check on your own account.
• A convenience sample. The accounts came from 40 niche searches a year ago. A different set of niches could shift a result this size.
• Current follower counts. An account that grew during the year is labeled by today's size, and only 5 of the 7 accounts over 1M posted on a Wednesday.

The Wednesday hour gap, best block against worst, is about a fifth, and its interval runs from a 16% loss to a 63% gain. The day effect is smaller, about 7% against the rest of the week and 12% against the weekend, and only the weekend gap clears.

What should you change in your Wednesday Instagram schedule?

In 815 Wednesday Instagram posts, no hour had an edge that cleared, and the only comparison that cleared was the day itself against the weekend.

1. If you can choose the day, pick the weekend over Wednesday. Wednesday ran about 12% under Saturday and Sunday, and that clears. It's the one change in this post the data backs.
2. Keep your Wednesday hour wherever it suits your week. No block of the Wednesday day beat another by a margin that cleared.
3. If you want a Wednesday slot to test, test 8am to noon in your audience's time zone. It's the steadiest block, with the highest share of posts beating their median, and it's the one block where Wednesday matched other days.
4. Don't move a Wednesday post to noon for a lunchtime spike. Noon to 4pm was Wednesday's lowest block here.
5. Check your own account once it has thirty Wednesdays. Pull your posts with instagram.user_posts, page past the newest twelve so you're not scoring posts that are still collecting likes, divide each post's likes by your median, and group by hour in your audience's time zone. Ignore any hour with fewer than about ten posts. Four calls cost $0.0032.

The Tuesday study and the Monday study found the same flat hour curve on those days, the Friday study found an hour effect that clears, and the Instagram study across all seven days uses the same method on the same accounts. The Instagram endpoints are what you'd use to rerun it on your own account.

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