4 Month Old Sleep Schedule: Wake Windows, Naps and a Daily Routine
Our sleep guidance is independently endorsed by Harvard sleep neurophysiologist Dr Kate Johnson, Ph.D.
Four months can feel like a turning point. Your baby is smiling, laughing, grabbing at everything and starting to roll. And just as you were finding your feet, sleep may have changed overnight: shorter naps, more wake-ups and a baby who suddenly fights the sleep they used to fall into so easily. If you are running on empty right now, please know you have not done anything wrong. This is one of the biggest changes in your baby’s sleep in the whole first year. For a full overview of how sleep changes from newborn to toddler, see our baby sleep schedule guide.
The good news is that this change is your baby’s sleep maturing, and a steady daily rhythm is the best thing you can give them right now. With the right wake windows, three well-placed naps and a calm bedtime, most 4 month olds settle into a much more predictable pattern.
4 Month Old Sleep Schedule Guidelines
At 4 months, most babies sleep around 15 hours in 24 hours. That usually looks like:
- Night sleep: around 12 hours in the cot, often with 1 or 2 night feeds
- Day sleep: around 3 hours, over 3 naps
- Wake windows: around 1.5 to 2.5 hours between sleeps, with 2.5 hours as the upper limit
- Bedtime: between 6:30pm and 7:00pm
These are averages, and every baby sits a little differently within them. The Little Ones® Sleep App builds your baby’s exact daily rhythm from their age and the sleep you track, and adjusts it as they grow, so you are not left guessing on the hard days.
In this article:
- Wake windows for a 4 month old
- How much sleep does a 4 month old need?
- How many naps should a 4 month old have?
- Sample 4 month old sleep schedule and routine
- Night sleep for a 4 month old
- How does the 4 month sleep regression affect sleep?
- How can I improve my baby’s naps and night sleep?
- Bedtime and bedtime routine for a 4 month old
- Why is my 4 month old fighting sleep?
- Safe sleep at 4 months
- Tips for smoother 4 month old sleep
- Key takeaways
- Frequently asked questions
Wake Windows for a 4 Month Old
A wake window is how long your baby can comfortably stay awake between sleeps. Most 4 month olds do well with wake windows of around 1.5 to 2.5 hours. The top of that range is an upper limit, not a target. It is the point by which your baby should already be asleep, and many babies are ready well before it, especially early in the day or after a short nap.
Wake windows have stretched a lot since the newborn weeks, and they are not the same length all day. The window before the short afternoon catnap is often one of the longest, and the stretch before bed is usually a little shorter again.
Wake windows build sleep pressure, the natural drive to sleep that helps your baby settle easily. Getting them right is one of the biggest levers you have at this age:
- Too short, and your baby is not tired enough. You may see a lot of crying or chatting in the cot, nap refusal or naps that end after one sleep cycle.
- Too long, and your baby tips into overtiredness. Stress hormones rise, settling gets harder and you are more likely to see short naps, bedtime battles and frequent night waking.
Get wake windows wrong and everything snowballs into more wakes. Rather than watching the clock all day, the Little Ones® Sleep App uses our Sleep o Rhythm to work out each wake window for your baby and tells you when the next sleep is due. You can read more about wake windows by age in our full guide.
How Much Sleep Does a 4 Month Old Need?
Most 4 month olds need around 15 hours of sleep in 24 hours. That is usually a 12 hour stretch overnight (including feeds and changes) and around 3 hours of daytime sleep across 3 naps. This sits within the 12 to 16 hours recommended for babies aged 4 to 12 months by the American Academy of Sleep Medicine.
Night sleep is the most restorative sleep for your baby, so protecting it matters. That means keeping an eye on day sleep too. A baby who sleeps much more than about 3 hours in the day often has less sleep pressure left for the night.
How long should a 4 month old sleep at night?
Most 4 month olds have around 11 to 12 hours of night sleep, from a bedtime around 7pm. That stretch often still includes 1 or 2 feeds. Some babies manage a longer first stretch, and some sleep through with an optional dream feed, while others still need 2 feeds. All of these are normal.
How Many Naps Should a 4 Month Old Have?
Most 4 month olds have 3 naps a day. If your baby is still taking 4 naps, or catnapping all day, this usually starts to settle closer to 5 months. We recommend a short nap, long nap, short nap structure:
- Morning nap: short
- Lunchtime nap: the long one, ideally around 2 hours
- Afternoon nap: a short catnap to bridge the gap to bedtime
This structure lines up with your baby’s developing body clock and spreads day sleep in the way that best supports a long night. A strong lunchtime nap is the anchor of the whole day.
How long should a 4 month old nap?
Across the day, most 4 month olds nap for around 3 hours in total. The lunchtime nap does most of the work at around 2 hours, with two shorter naps either side. Naps of 30 to 45 minutes are very common at this age, especially in the morning, while your baby learns to link sleep cycles.
Sample 4 Month Old Sleep Schedule and Daily Routine
Here is an example of a simple daily sleep plan for a 4 month old who wakes at 7am, built around 3 naps. Use it as a starting point, not a rule book. If your baby wakes earlier or later, shift the whole day to match.
Text Version of 4 Month Old Sleep Schedule
| Time | What is happening |
|---|---|
| 7:00 am | Wake for the day and milk feed |
| 9:15 am | Nap 1: short morning nap |
| 12:15 pm | Nap 2: long lunchtime nap, around 2 hours |
| 4:45 pm | Nap 3: short catnap |
| 6:30 pm | Bedtime routine and last milk feed |
| 7:00 pm | Asleep for the night |
This gives around 3 hours of day sleep and a 12 hour overnight sleep opportunity. If the lunchtime nap was short, a slightly longer catnap or an earlier bedtime helps your baby get to the evening without becoming overtired.
Predictability offers comfort and security to a developing baby. A regular routine helps your baby tell day from night, which supports longer stretches of night sleep, and over time the same steps become cues your baby links with sleep.
Real days rarely run like a table. A short nap, a busy morning out or a rough night can throw everything out. The Little Ones® Sleep App rebuilds the rest of your baby’s day in real time when a nap runs short or long, so you always know what comes next.
“Nicky and Amanda have written scientifically informed, yet easy to read programs that cover all the major areas of concern for new parents - sleep, feeding and settling and, importantly, how these interact with one another. Finding this balance can be tricky and these programs take the guesswork out of it.”
Dr Kate Johnson, Ph.D. in Sleep Physiology, Harvard Medical School and Stanford Research Institute
Dr Kate Johnson is a sleep neurophysiologist with a Ph.D. in Sleep Physiology from the University of Melbourne and postdoctoral fellowships at Harvard Medical School and Stanford Research Institute. She discovered Little Ones® independently through her clinical work with families and endorses our methods unprompted. Read her full endorsement.
Night Sleep for a 4 Month Old
By 4 months, many babies can sleep longer stretches at night. Some are down to one night feed, some sleep through the night with a dream feed, and others still need 2 feeds. If your baby is still waking a lot, that does not mean something is wrong.
If your baby is waking frequently, it is worth looking at a few things:
- Their day sleep balance: too much or too little day sleep, or wake windows that are off
- Their bedtime, which may have crept later than suits them
- Whether they need the same help to fall back asleep after every sleep cycle, like a feed, rock or dummy (sleep associations)
- Hunger, especially during a growth spurt
Needing help to resettle after each sleep cycle is especially common if your baby has started the 4 month sleep regression.
How Does the 4 Month Sleep Regression Affect Sleep?
Somewhere around 3 to 5 months, your baby’s sleep changes from newborn sleep to a more adult-like pattern, with lighter and deeper stages and more frequent brief wakes between sleep cycles. That is what parents call the 4 month sleep regression. It can bring more night wakes, shorter naps and a baby who suddenly struggles to settle, often after weeks of good sleep. It is a permanent step forward in development, not a step backwards.
Each of those brief wakes between cycles is a moment where your baby either drifts back to sleep or calls for help, which is why settling skills matter so much from this age.
Our full guide to the 4 month sleep regression covers the signs and exactly how to help your baby through it, our guide to how long the 4 month sleep regression lasts explains what to expect, and our 4 month sleep regression case study shows how one family turned it around.
“My 4mo was waking every 1.5-2 hours over night, since birth - I hadn’t slept longer than 2 hour stretches since he was born. I finally got Little Ones® and within 4 days he sleeps 7 hours overnight. I can’t believe something as small as following a schedule could improve things this much, it’s a game changer.”
BSciccy, mum to a 4 month old, Australia. 5 Star App Store review.
How Can I Improve My Baby’s Naps and Night Sleep?
Start with the day. When wake windows, nap lengths and bedtime fit your baby, naps lengthen and nights usually follow. Then look at how your baby falls asleep.
Helping your baby fall asleep more independently can be a game changer for naps and nights. By 4 months, many babies are ready for gentle self-settling, introduced gradually alongside an age-appropriate daily routine. Self-settling does not mean you cannot comfort your baby. It means giving them the chance to practise drifting off without being rocked, fed or patted all the way to sleep, which leads to longer naps, easier bedtimes and fewer overnight wakes.
Sleep training a 4 month old
Many parents start thinking about sleep training at 4 months, especially once the regression hits. Gentle, responsive settling is the place to start at this age. Our guide to sleep training and when to start explains the options, and these signs your baby is ready help you decide.
The Little Ones® Sleep App walks you through more gentle settling methods than any other app, matched to your baby’s age and how they currently fall asleep. And if you would like someone in your corner, you can add one-on-one support from a Little Ones® sleep consultant.
Bedtime and Bedtime Routine for a 4 Month Old
Most 4 month olds have a sweet spot bedtime between 6:30pm and 7:00pm, depending on how their naps went and when the last nap ended. After a day of short naps, go for the earlier end.
A predictable, calming bedtime routine tells your baby that night sleep is coming. At this age, 20 to 30 minutes is plenty, and it might include:
- A bath
- A massage and changing into pyjamas
- Dimming the lights
- A quiet song, story or cuddle
- A final feed in a dimly lit room
- Into their sleep space sleepy but still awake
Doing the same steps in the same order every night helps your baby know what comes next, and that predictability makes it easier for them to let go into sleep.
Why Is My 4 Month Old Fighting Sleep?
If your baby has started fighting naps or bedtime, you are far from alone. So much is changing at once at 4 months.
Short naps
Often caused by a wake window that is a little too long or too short, or by your baby needing help to link one sleep cycle to the next.
Frequent night waking
This can come from hunger, the sleep environment, too much or too little day sleep, or relying on help to fall back asleep. Our guide to night waking explains what is normal at this age.
Early morning waking
Usually linked to too much day sleep, overtiredness or light and noise in the room. Our guide to early waking walks through each cause.
Nap refusal
Often happens when the wake window before the nap was too short or too long. Look at the timing first, and give any change a few days before deciding it has not worked.
Rolling
Many babies start rolling around now and love to practise it in the cot. Plenty of floor time during the day helps them master it faster, and once they can roll, it is time to stop swaddling.
Safe Sleep at 4 Months
Before any sleep schedule, settling method or routine, the foundation is always safe sleep. Place your baby on their back, on a firm flat mattress in a clear cot, and follow safer sleep guidance from Red Nose (AU/NZ), The Lullaby Trust (UK) and the AAP (US). See our full Safe Sleep Guidelines for region-specific resources, and our guide to setting up the ideal sleep environment.
Rolling and swaddling
Once your baby shows any signs of rolling, stop swaddling and move to a safe sleeping bag with their arms free. Keep putting your baby down on their back for every sleep. If they roll onto their tummy on their own and can roll back again, it is fine to let them stay in the position they find.
Tips for Smoother 4 Month Old Sleep
- Keep morning wake-up time fairly consistent, ideally around 7am.
- Stick to age-appropriate wake windows to avoid overtiredness and undertiredness.
- Aim for a short nap, long nap, short nap day, with the long nap at lunchtime.
- Use the same short wind-down before every nap and bedtime.
- Give your baby the chance to fall asleep in their cot, sleepy but awake, when you can.
- Keep night feeds calm, dark and boring so day and night feel different.
- Give plenty of floor time so rolling gets practised in the day, not the cot.
- Be gentle with yourself. The 4 month changes are hard, and they do pass.
“This program and app has been a sleep saver! It’s helped to get my 4 month old to settle down on his own with minimal fuss in a matter of days in the midst of a tough regression. I love the dynamic tracker which is useful in particular when starting out and when you have the odd bad days! Could not recommend it enough.”
MightyAnn, mum to a 4 month old, Singapore. 5 Star App Store review.
Key Takeaways: 4 Month Old Sleep Schedule
- Total sleep: around 15 hours in 24 hours.
- Naps: 3 a day, short, long, short, adding up to around 3 hours.
- Wake windows: around 1.5 to 2.5 hours, with 2.5 hours as the upper limit.
- Bedtime: between 6:30pm and 7:00pm.
- Night feeds: often 1 or 2, and that is normal.
- Settling: a gentle start on self-settling helps your baby through the 4 month changes.
If your baby is still 3 months old, our 3 month old sleep schedule shows where they have come from. As they approach 5 months, our 5 month old sleep schedule covers what changes next.
And if you are tired of guessing, the Little Ones® Sleep App gives you an age-matched daily schedule, sleep tracking and step-by-step settling support, trusted by 1 Million+ families.
Frequently Asked Questions About 4 Month Old Sleep
How long should a 4 month old be awake between naps?
Most 4 month olds do well with around 1.5 to 2.5 hours awake between sleeps. The top end is an upper limit rather than a target, and many babies are ready for sleep sooner. The Little Ones® Sleep App sets your baby’s wake windows for their exact age and adjusts them using the sleep you track.
How much sleep does a 4 month old need?
Most 4 month olds need around 15 hours of sleep in 24 hours, including a 12 hour stretch overnight (with feeds) and around 3 hours of day sleep across 3 naps.
How many naps should a 4 month old have?
Most 4 month olds have 3 naps a day: a short morning nap, a long lunchtime nap of around 2 hours and a short afternoon catnap. Some still need 4 naps for a little longer.
How long should a 4 month old sleep at night?
Most 4 month olds have around 11 to 12 hours of night sleep from a bedtime around 7pm, often with 1 or 2 feeds overnight.
What time should a 4 month old go to bed?
Most 4 month olds do well with a bedtime between 6:30pm and 7:00pm. After a day of short naps, an earlier bedtime helps prevent overtiredness.
What is a good sleep plan for a 4 month old?
A simple plan is a 7am wake-up, a short morning nap, a long lunchtime nap of around 2 hours, a short afternoon catnap and a calm bedtime routine leading to sleep by around 7pm. Wake windows of around 1.5 to 2.5 hours keep the day balanced.
Why is my 4 month old suddenly waking more at night?
Around 4 months, sleep matures into a more adult-like pattern with more brief wakes between sleep cycles. This is often called the 4 month sleep regression. Babies who need help to fall asleep at bedtime often need the same help after each wake, so gentle self-settling and a balanced day make a big difference.
Is 4 months too early for sleep training?
Many babies are ready for gentle, responsive settling from around 4 months, especially if they are feeding well and growing well. The Little Ones® Sleep App matches a gentle settling method to your baby’s age and how they currently fall asleep. Check with your child health nurse or GP if you are unsure.
Bibliography
The sleep needs, nap patterns and safe sleep guidance in this article draw on peer-reviewed research into infant sleep, international health guidelines and the clinical experience behind the Little Ones® Sleep App.
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