4 Month Old Sleep Schedule: Wake Windows, Naps & Sample Days

The Short Answer

A 4-month-old usually stays awake for 1.5 to 2 hours between sleeps, takes 3 or 4 naps, and sleeps about 3 to 4 hours in total during the day. The American Academy of Sleep Medicine consensus, endorsed by the AAP, recommends 12 to 16 hours of total sleep per 24 hours, including naps, for babies aged 4 to 12 months.

These are ranges to start from, not rules to hit. For every age from birth to 24 months, see our wake windows by age chart and the full baby sleep schedule by age.

Wake Windows Through the Day

Wake windows are not the same length all day. For many 4-month-olds they look roughly like this:

After a short nap (30 to 40 minutes), babies often get tired sooner than usual. There is no fixed number of minutes to subtract, so start watching for sleepy cues earlier after a short nap, and compare a few days before you change the whole schedule.

Why So Much Changes at 4 Months

The fourth month is one of the busiest periods in sleep development, and several changes overlap:

• Sleep architecture matures. Your baby's sleep starts to look more like an older child's, with clearer, lighter stages that are easier to wake from. This is what sits behind the 4 month sleep regression.
• The body clock settles. In the first months a baby is still learning day from night. Around 3 to 4 months, night sleep usually separates more clearly from daytime sleep.
• Wake windows stretch. What was the upper limit at 3 months (about 1.5 hours) often becomes the starting point at 4 months.
• There is more to see and do. Rolling, grabbing, and a new interest in everything around them make awake time more stimulating, and tiredness can be better hidden.

The result: a schedule that worked two weeks ago can suddenly stop working. That is normal, and it does not mean you are doing anything wrong.

Sample 4 Month Old Sleep Schedules

Here are two versions. The times are examples, so if your baby wakes at 6:00 or 8:00 AM, shift the whole day. The length of the windows and how your baby responds matter more than the clock.

4-Nap Schedule (Shorter Naps)

• 7:00 AM — Wake up, feed
• 8:30–9:15 AM — Nap 1 (wake window: 1.5 hrs)
• 10:55–11:40 AM — Nap 2 (wake window: 1 hr 40 min)
• 1:25–2:40 PM — Nap 3 (wake window: 1 hr 45 min)
• 4:30–5:00 PM — Nap 4, short (wake window: 1 hr 50 min)
• 6:40 PM — Bedtime routine
• 7:00 PM — Asleep for the night (wake window: 2 hrs)

Daytime sleep: about 3 hours 15 minutes. This version suits babies who nap for 30 to 45 minutes at a time.

3-Nap Schedule (Longer Naps)

• 7:00 AM — Wake up, feed
• 8:30–10:00 AM — Nap 1 (wake window: 1.5 hrs)
• 12:00–1:30 PM — Nap 2 (wake window: 2 hrs)
• 3:30–4:15 PM — Nap 3 (wake window: 2 hrs)
• 5:55 PM — Bedtime routine
• 6:15 PM — Asleep for the night (wake window: 2 hrs)

Daytime sleep: about 3 hours 45 minutes. This version works once your baby can sleep 1 to 1.5 hours in a single nap.

Feeds are deliberately not pinned to the minute. Babies this age eat on very different rhythms, and the sleep schedule should fit around feeding, not the other way round.

When the Day Doesn't Go to Plan

Real days rarely match a sample schedule. A nap happens in the car, a doctor's appointment runs long, or your baby only sleeps on you. A few simple adjustments keep one off day from spilling into the night:

• Missed or very short nap: offer the next nap a little earlier, as soon as sleepy cues show up, rather than waiting for the planned time.
• Nap in the stroller, car seat, or carrier: it still counts as sleep. Check on your baby often, and if they fall asleep in a car seat or carrier, move them to a flat, firm sleep surface when you can.
• A short catnap late in the day: a 20- to 30-minute nap can bridge the gap to bedtime when the earlier naps were short.
• A rough day overall: move bedtime 20 to 30 minutes earlier. An earlier night is usually easier than an overtired one.

The next morning, start fresh from your baby's wake-up time instead of trying to "make up" for the day before.

How Many Naps Should a 4 Month Old Take?

Most 4-month-olds take 3 or 4 naps. Nap length usually decides which:

• Naps of 30 to 45 minutes: most babies need 4 naps to avoid getting overtired by evening.
• Naps of 1 to 1.5 hours: 3 naps are often enough, with a slightly longer wake window in the afternoon.
• A mix of both: completely normal at this age. Plan for 4 naps and let the fourth one go on days when the earlier naps were long.

For how nap counts change after this stage, see our baby nap schedule by age.

Night Sleep and Night Feeds at 4 Months

Most 4-month-olds sleep somewhere around 10 to 12 hours at night, and many still wake for one or two feeds. Some babies already sleep a long first stretch, while others wake every few hours, and both can be normal at this age. How often your baby needs to feed at night depends on growth, how they are fed, and their own rhythm, so talk to your pediatrician before you try to drop night feeds.

What helps at night:

• Keep night feeds calm and dim. Low light, few words, and a quick diaper change only if needed help your baby tell night from day.
• Pause before you respond. Babies grunt, stir, and even cry briefly between sleep cycles. A minute or two of listening shows whether they are really awake.
• Put your baby back down drowsy when you can. It gives them a chance to practise falling back asleep in the crib.

Short Naps: What's Normal

Naps of 30 to 45 minutes are very common at this age. An infant sleep cycle lasts roughly 50 minutes (about 90 for adults), and many 4-month-olds do not yet link cycles during the day. So your baby wakes after one cycle, often happy, and is tired again an hour later.

What can help:

• A dark room for naps. Darkness makes it easier to fall asleep and to drift back between cycles.
• A calm start to every nap. A short, repeatable mini-routine (diaper, sleep sack, close the curtains) signals that sleep is coming.
• A pause before you go in. If your baby fusses after 35 minutes but is not crying, give it a few minutes. Sometimes they settle back to sleep on their own.
• White noise at a low volume. If you use it, keep it at the lowest volume that works and place the device well away from the crib.
• Earlier watching after a short nap. The next wake window is often shorter, and your baby's cues will tell you by how much.

Naps usually lengthen gradually over the next few months. If your baby is content between naps and growing well, short naps on their own are not a cause for concern. Our guide to babies who only nap 30 minutes goes deeper.

The 4 Month Sleep Regression and Your Schedule

During the regression your baby may wake more at night, take longer to fall asleep, and nap for shorter stretches. For a while it helps to:

• adjust wake windows in small steps and follow your baby's cues. Some babies need a slightly shorter window when sleepy cues show up earlier than usual, because an overtired baby finds it harder to settle. Others nap better with a slightly longer window that builds more sleep pressure. Change by 10 to 15 minutes at a time and compare a few days,
• move bedtime earlier after a day full of short naps,
• keep the same bedtime routine, even when falling asleep takes longer than it used to.

For many families the hardest stretch lasts from a few days to a few weeks. Our guide to the 4 month sleep regression covers the causes and gentle ways through it.

Sleepy Cues to Watch For

A wake window table is only a starting point. Your baby's cues tell you more. At 4 months the most common ones are:

• staring into space and losing interest in toys,
• turning the head away and avoiding eye contact,
• rubbing the eyes, yawning, red eyelids,
• fussing that does not stop when you change the activity.

Late signs, such as crying that is hard to soothe, arching, or a sudden burst of energy, usually mean the window has already passed. Put your baby down as soon as you can in a calm, dim place. If this happens often, our guide to overtired baby signs can help.

Safe Sleep Reminders

Many babies start rolling around this age, so it is worth a reminder of the American Academy of Pediatrics safe sleep guidance:

• always put your baby down to sleep on their back,
• on a flat, firm mattress with no pillows, blankets, bumpers, or soft toys,
• stop swaddling as soon as your baby shows signs of trying to roll, and use a sleep sack with free arms instead,
• if your baby rolls both ways on their own, you do not need to turn them back, but keep putting them down on their back.

When Do Babies Drop to 3 Naps?

Most babies drop the fourth nap between 4 and 6 months, as the midday naps get longer. Signs it may be time:

• the fourth nap often does not happen, or lasts only 10 to 15 minutes,
• the fourth nap pushes bedtime to 8:00 PM or later,
• your baby handles wake windows close to 2 hours without getting overtired.

Change the schedule only when these signs repeat for several days. One rough day does not decide anything. For when the next transitions usually happen, see nap transitions by age. For what a typical day looks like a few months later, see the 7 month old sleep schedule.

How Dozling Helps

At 4 months wake windows can change from week to week, so memory is not a reliable guide. In the Dozling app, you log a nap with one tap and the app counts awake time from the moment your baby wakes, including on the home screen widget. The Sleep Window prediction estimates the next good time for sleep from your recent logged days, not only from a general age chart.

It is a planning tool, not medical advice, so always weigh it against your baby's cues. You can read more about how the wake window tracker works.

When to Talk to Your Pediatrician

Contact your pediatrician if you notice:

• your baby is hard to wake or unusually floppy or listless,
• feeding problems or poor weight gain,
• loud snoring, pauses in breathing, or labored breathing during sleep,
• a sudden change in sleep together with fever, vomiting, or other signs of illness.

Your pediatrician can check whether sleep changes are linked to health or simply to development.

Last updated: October 26, 2026. Sources: American Academy of Sleep Medicine (Paruthi et al., 2016), American Academy of Pediatrics safe sleep guidance.