The Summer Email Slump Is a Myth — Here's What Actually Works in July and August

Every June, somebody at every marketing team says it: "It's summer, nobody's checking email, let's just… pause for a bit." Six weeks later they wonder why their list went cold.

Here's the truth: the summer email slump isn't a slump — it's a shift. Your subscribers haven't disappeared. They're just reading you at different times, in different moods, on different devices, while drinking something with a tiny umbrella in it. The marketers who think they're "giving people a break" are usually the ones whose unsubscribes spike in July, because their list forgot they existed.

Below is what's actually happening in your subscribers' summer inbox — and what to send them while everyone else is taking a strategic nap.

When people actually read email in summer

Forget the office-hours assumption. In July and August, peak inbox activity shifts to the cracks around the day:

• The 7am pre-beach scroll. Coffee, croissant, phone. People plan the day before the heat kicks in.
• The gate-at-the-airport hour. A captive, slightly bored audience with no work to do for 90 minutes.
• The poolside / hammock window (around 11am–1pm). Half attention, but they're on their phone.
• The "it's too hot to sleep" 10pm slot. Bed, phone, scrolling. Peak unsubscribe-OR-engage window.
• Sunday evening before the new week. People reset, plan, and triage their inbox even on holiday.

The classic "Tuesday 10am" advice still works, but in summer it's worth testing 7am and 8–9pm too. (More on the timing question in our piece on the best day of the week to send emails.)

What changes — and what doesn't

A few things genuinely shift in summer. Knowing which lets you write for the moment instead of fighting it.

• Mobile share spikes. Even more than usual. Your subscriber is on a phone, in landscape, with a glare on the screen. (Worth reading our take on email on mobile.)
• Attention shortens. Long copy gets swiped. The subject line and the first line do almost all the work.
• Mood improves. People are more open to fun, light, useful content. They're less open to corporate-jargon "Q3 update" emails.
• What doesn't change: people still buy. They book trips, restock summer wardrobes, plan back-to-school, sign up for autumn things. Wallets do not, in fact, go on vacation.

What to send when everyone's "at the beach"

This is the actually-useful part. Here's what works in July and August, in order of how reliably it earns its place:

1. Short, useful, immediately scannable

One idea. One link. One paragraph if you can swing it. The kind of email someone can read between sips of an iced coffee and act on without taking off their sunglasses.

2. Hyper-relevant offers via segmentation

Summer is when "send everything to everyone" stops working completely. The fix is the same fix that works every other month, just more important: segment your list so the email actually fits what that person cares about. Need ideas for how? Our segmentation ideas post is a good starter.

3. Triggered emails that meet people in the moment

An abandoned cart at 11pm in a hotel room. A welcome series for someone who just signed up at the airport. A birthday email landing exactly on someone's vacation week. Triggers don't care that it's August — they fire when behavior happens, which is exactly when relevance is highest.

4. Personality, not promotions

Summer is a great month to send something that isn't "20% off." A behind-the-scenes story, a founder note, a "what we're reading this summer" round-up, a customer feature. Subscribers reward the change of pace. (A bit of personalization takes any of these up a level.)

5. A wake-up wave for the quiet half of your list

Curious when your subscribers actually open in summer? Mailpro’s email statistics show you the exact hours and days your list engages — so you can stop guessing.

Yes, even now — especially now. People do an inbox-cleanse on vacation. You want to be one of the kept senders, not the swiped-away ones. A short, friendly win-back email to subscribers who haven't engaged in 60+ days lands surprisingly well in July.

What NOT to send (the things that actually cause a "slump")

If your summer feels dead, it's usually because you did one of these without realising:

• You went silent for six weeks. Your subscribers forgot you. When you come back in September, you look like a stranger.
• You sent twice as much to "make up for vacation week." Hello, email fatigue and unsubscribes.
• You sent the same generic offer to everyone. Holidays make people more selective, not less — relevance matters more, not less.
• You sent a wall of text optimised for desktop. See above re: phone, glare, hammock.
• You wrote subject lines that screamed "BUY NOW" at people who are barefoot. Soft, curious, value-led works better than urgent.

Let automation be your beach buddy

Here's the genuinely freeing bit: most of what you should be sending in summer doesn't need you to be at your desk. Welcome series, abandoned-cart, birthday emails, post-purchase follow-ups, re-engagement nudges — all of this can run on its own.

If you set up your automated emails properly, your list keeps getting warmed, your subscribers keep getting timely messages, and your revenue keeps trickling in while you are factually in a swimming pool. Our short read on automating your emails to save time is a good place to start — ideally before you book the flight, not from the gate.

A 3-step summer playbook

1. Don't go silent. One thoughtful email every 7–14 days beats six weeks of nothing followed by a desperate September comeback. (Our note on how often you should email your list covers the cadence question.)
2. Segment more aggressively, not less. Send fewer, sharper emails to smaller groups. Sleeping subscribers get a re-engagement. Buyers get product news. Browsers get value content. Everyone gets something that fits.
3. Turn on the autopilot before you leave. Welcome, abandoned-cart, birthday and win-back automations — if these are running, your "summer slump" turns into "summer compounds quietly while I'm gone."

For more practical summer tactics on the writing side, our companion piece on summer email marketing pairs well with this one.

Skip the slump entirely

Mailpro is built for exactly this kind of summer: easy segmentation, reliable automation, mobile-friendly templates, and deliverability that doesn't take a holiday. Create your free Mailpro account and set your summer to autopilot, or see the plans to find your fit.

Frequently asked questions

Is summer really a bad time for email marketing?

No. Open and click rates do shift, but engaged subscribers keep reading — just at different times of day and mostly on mobile. The senders who go silent or oversend are the ones who feel a "slump"; the senders who stay consistent and relevant usually keep performing well.

When should I send emails in July and August?

Test earlier than usual (around 7am) and later than usual (8–10pm), in addition to your normal mid-morning slot. Summer behaviour shifts toward the cooler edges of the day. Sunday evenings also perform well as people plan the week ahead.

What should I send when most of my list is on vacation?

Short, mobile-first, useful or fun content — not heavy promotions. Lean on triggered automations (welcome, abandoned-cart, birthday) that meet people in the moment, and send a re-engagement email to subscribers who've gone quiet.

Should I email less often in summer?

Not necessarily — sending less relevantly is what matters. Many marketers cut volume but increase segmentation, which often outperforms a louder, more generic schedule. Cadence depends on your list, not the season alone.