Best Time to Send an Email

Imagine your Tuesday newsletter gets a strong open rate. You send the exact same email on Friday afternoon, and it barely gets half the engagement. Same subject line, same list, same offer. The only thing that changed was the send time.

That gap is the whole reason marketers keep chasing the best time to send an email. A good subject line still matters. A clean list still matters.

But a message that lands while a recipient is stuck in a meeting, or asleep, rarely gets a fair read. None of that other work gets seen if the timing is wrong.

Forget the "it depends" non-answer most guides give you. Here's why send time actually moves the needle. Here's what the data says about day, industry, and audience, and which windows quietly kill a campaign before anyone reads it.

In a crowded market, timing is one of the few levers a marketer fully controls. Every list gets pitched by dozens of brands a day, and most of that competition is out of your hands. By the end, you'll have a starting point to test, instead of a guess.

Every email competes for a slice of attention that keeps shrinking. Worldwide email users are set to grow from over 4.4 billion in 2024 to nearly 4.9 billion by 2028. That's according to EmailTooltester's research on global email usage.

The figures show email remains a massive global channel. They don't identify a universal best sending hour for every audience — that part still comes down to your own list.

Send time decides whether a message arrives during that window or misses it completely. An email sent at the right moment gets read while a recipient is actively checking their inbox. The same email, sent two hours later, gets buried under everything that landed in between. Nothing about the content changed; only the timing did.

People aren't short on email exposure — they're short on attention span within it. EmailTooltester's research found people spend upward of three hours a day on work email alone. They check it from bed, during meetings, and in front of the TV. That volume is exactly why arriving at the right moment matters more than arriving at all.

Get the timing right, and three things shift at once:

• More opens. A recipient sees the subject line while it's still near the top of their inbox.
• More attention per open. Someone checking email during an actual break reads more carefully than someone skimming mid-task.
• A cleaner path to click. Timing decides not just whether an email gets opened, but how much attention it gets afterward.

Marketers often treat send time as a minor setting, tucked in after the subject line and design are already done. That's the real mistake. A great campaign sent at a dead hour still underperforms a mediocre one sent at the right time. Deliver the right content at the wrong hour, and every other metric on the report suffers for it.

Get your automation and audience data in order first. Then treat timing as its own variable worth testing.

Based on Wooxy's review of current third-party research — including CoSchedule, Databox, and Litmus — midweek mornings offer a reasonable starting point for testing. There's no single best time to send a marketing email that works for every list. What does exist is a recurring pattern across several platform studies, although the underlying datasets, years, audiences, and success metrics differ. Real differences also show up by industry, audience, and what kind of business is doing the sending.

CoSchedule reviewed ten proprietary platform studies, most run between 2020 and 2022 by a mix of major email sending platforms. These aren't independent academic studies — each platform analyzed its own users, so the samples and methods vary. CoSchedule itself flags that Apple's Mail Privacy Protection, rolled out in late 2021, can make open-rate data less reliable across the board. Collectively, though, those studies point to a consistent midweek pattern.

Thursday, Tuesday, and Wednesday took first place in eight of the ten studies CoSchedule reviewed. Saturday and Sunday consistently rank last across nearly every study on the list. During the week, subscribers have already cleared the Monday backlog, and they haven't checked out for the weekend yet.

That combination likely explains most of the midweek advantage. Plot it on a graph, and the pattern looks like a gentle hill: rising from Monday, peaking midweek, falling toward the weekend. The gap between the top days and the weakest ones isn't always huge in raw percentage terms. Still, it repeats so consistently across unrelated studies that it's worth building a default schedule around.

Time of day follows a similarly consistent pattern. The top five send times, across that same set of studies, were 10 a.m., 9 a.m., and 8 a.m., followed by 1 p.m. and 3 p.m.

Morning hours dominate the ranking overall. A second, smaller peak also shows up right after the typical lunch break.

10 a.m. took the #1 spot outright in four of the ten studies reviewed. That lines up with a simple daily habit. Most people clear a first pass through their inbox once they've settled into the workday.

Many check again after lunch, once the early afternoon slump sets in. Sending into either window puts a message in front of someone actively checking, not someone archiving on autopilot.

An ecommerce store and a SaaS company rarely share the same audience or the same daily rhythm. Industry mainly affects working hours, device use, buying cycle, and how urgent the message feels to the reader.

A SaaS audience, checking email between meetings, tends to skew toward standard business hours. An ecommerce or local service audience often has more flexibility outside the workday. That pattern varies enough by business that it's worth treating as a hypothesis, not a rule.

None of this replaces testing your own list. Use industry patterns only to pick your first test window, then let your own click and conversion data make the call.

One more variable: the type of email you're sending. A transactional message, like a shipping update, gets read quickly no matter when it's sent, since the recipient already expects it. A promotional campaign is different. It's competing for attention it hasn't earned yet, which is exactly why it benefits far more from a well-timed send.

B2B and B2C audiences check email on different clocks, though the gap is smaller than most guides suggest.

A B2B recipient reads work email at work, checking their inbox in the natural gaps between meetings rather than on personal time. That puts Tuesday and Thursday mornings near the top of most B2B lists. It's a strong starting assumption, but still worth confirming against your own data.

B2C behavior is more varied, but it isn't simply nocturnal. Around 30% of marketers overall report the same 9 a.m.-to-noon window as their strongest, B2C included. Some B2C and ecommerce lists do better in the evening or on weekends. Treat that as a pattern to test, not a default.

Segmenting your list by audience type often reveals more than picking one universal send time ever could. Segmenting by industry alone misses this distinction. A single company selling to both business buyers and individual consumers may need two schedules running in parallel. Wooxy's segmentation tools make it possible to build those groups around actual behavior, instead of a rough guess.

Day and hour aren't the only variables. The type of message you're sending changes the calculus too, since some emails are time-sensitive and others aren't.

A welcome email or an abandoned-cart reminder should fire off a trigger, not a calendar slot. The day-and-hour research in this guide applies mainly to broadcast sends, like a newsletter or a promotional campaign. Those are the sends where nothing else is nudging the timing already.

Every study above analyzed its own platform's users, not yours. Databox put this well after surveying dozens of marketers and sales teams about their own approach. Their conclusion: asking your own audience directly, then testing a handful of send windows, beats guessing from someone else's aggregate data.

It's worth reading with some caution. Apple's Mail Privacy Protection now preloads images on a large share of opens. Open-based studies like this one are best treated as historical context, not a live read on today's behavior.

A simple test plan works well here. Create two or three send-time variants from the table above, instead of guessing at a single one. Run each one for a few campaigns in a row, rather than sending a single blast and calling it a verdict.

AMI can build those variants for you in a couple of clicks. Testing three send times doesn't have to mean rewriting the same email three separate times. Then check opens, clicks, and unsubscribes across Wooxy's detailed analytics reports. One well-run test on your own list tells you more than any outside study ever will.

In CoSchedule's aggregated dataset, 7 p.m. to 2 a.m. was the weakest general window, with none of the ten studies reporting strong engagement there. Recipients are more likely to be offline, winding down, or already asleep during those hours. That's the aggregate pattern, though. Seasonal campaigns, consumer audiences, and international segments can behave differently, so it's still worth testing rather than ruling this window out entirely.

Weekends carry the same problem at the day level in most aggregated rankings. Saturday and Sunday post the lowest open rates across most of the studies CoSchedule reviewed.

Worth noting: fewer campaigns get sent on weekends in the first place. A handful of individual datasets have shown solid rates on that lower volume. Treat weekends as a lower priority to test, not an automatic exclusion.

Three windows to avoid by default:

• Late evening to early morning (7 p.m.–2 a.m.): the weakest engagement window in nearly every study reviewed.
• Weekends: fewer people check work-related messages at all, so the raw number of opens drops sharply.
• First thing Monday: rarely the worst slot, but rarely the best either — recipients are still digging out from a weekend backlog.

Repeatedly sending at a poorly matched time may reduce visibility over several campaigns. A single off-hour send rarely does lasting damage on its own. Watch clicks, click-through rate, complaints, and unsubscribes together, rather than assuming send time alone is the cause.

Send scheduling lets you pick the exact date and time a campaign goes out, on every plan. The harder part is knowing what to schedule for. That answer lives in your own delivery, open, and click data, not someone else's benchmark.

Wooxy's dashboard tracks delivery, opens, clicks, bounces, and unsubscribes for every send. A single-day filter on you detailed reports switches automatically to an hourly view. That's how you see exactly when your own list engages. Pair that with Wooxy's guide to A/B testing email campaigns if send time is the first variable you want to test.

AMI, Wooxy's built-in AI assistant, drafts the campaign content itself, so testing three send times doesn't mean writing three emails by hand. Run the same message at a couple of windows, compare the numbers, and let your audience settle the debate.

The best time to send an email isn't one universal hour — it's a starting point. Aim for Tuesday through Thursday, late morning, with a smaller window after lunch. Avoid weekends and late evenings, and you've already dodged the biggest mistake in email timing.

From there, it gets specific to you. A B2B list behaves differently than a B2C one, and no outside study replaces watching your own opens and clicks. Pick two or three windows from this guide, test them against your own list, and let your dashboard settle the argument.

Ready to test it on your own list? Wooxy gives you scheduling, detailed analytics, and AMI-drafted campaigns in one dashboard. Start a free trial and find your own best send time this week.