Wake Windows by Age: How to Time Baby’s Sleep Just Right

As a first-time mom, I followed wake windows religiously until my son was about 6 months old. I even tracked all of his naps. And honestly? While his daytime sleep was chef’s-kiss perfect, his night sleep fell apart around that age. No amount of wake-window tracking would save us from the sleep regression. It was when I stopped relying on wake windows and went by his sleepy cues that things (gradually) got better. Still, wake windows were a savior in the early months.

While everyone’s experience is different, wake windows can be helpful for sleep-deprived parents to ensure baby’s awake for long enough to be put down for a nap or bedtime—but not too long for them to get overtired.

So what are wake windows, exactly? Ahead, experts and real parents dive into everything you need to know—plus, a handy wake windows by age chart.

Key Takeaways

• What is a wake window? A wake window is the length of time baby can comfortably stay awake between periods of sleep.
• Wake windows by age: Wake windows can be as short as 30 minutes for a newborn and extend up to four hours by 9 to 12 months—and longer, as baby grows into a toddler.
• Baby’s shortest wake window is typically the first (when they wake up in the morning). The longest wake window is usually the one before bed.
• Signs it’s time to extend baby’s wake window include fighting naps, consistently taking short naps, taking a long time to fall asleep and frequent night waking.
• When to stop following wake windows: Typically, wake windows gradually become less useful as baby matures during their first year of life.

What Is a Wake Window?

Wake windows are the periods of time that baby can comfortably stay awake between sleep periods. “Awake time starts the moment baby wakes up and includes feeding time, diaper changes, playtime, tummy time and any other awake activities,” explains Kandra Becerra, a certified pediatric sleep consultant based in Denver, founder of Rocky Mountain Sleeping Baby and mom of two. She adds that wake windows typically end when you put baby down for sleep (not when they actually fall asleep).

Wake Windows by Age

Newborn wake windows are the shortest—but as baby gets older, their wake windows will naturally get longer. While all babies are unique—some (like my son) love to stay awake indefinitely, while others just can’t hang. These recommended wake windows by age can help you figure out when baby should be sleeping.

• Newborn wake windows: 30 minutes to 1 hour
• 2 month old wake windows: 1 to 1.5 hours
• 3 month old wake windows: 1.25 to 2 hours
• 4 to 5 month old wake windows: 1.5 to 2.5 hours
• 6 to 8 month old wake windows: 2 to 3 hours
• 9 to 12 month old wake windows: 2.5 to 4 hours

It’s important to note that these wake window ranges are averages, notes Dr. Gary Kirkilas, DO, a pediatrician at Phoenix Children’s. “I don’t suggest parents worry if their infant is sleeping slightly more or less.” That said, if baby’s sleeping too much—meaning well above their recommended amount—or is difficult to wake, it’s important to see your pediatrician.

While baby wake windows aren’t an exact science, many parents find them helpful. You might follow them to make sure baby is awake long enough between naps to actually be tired when the next sleep period rolls around, and to put them down for sleep early enough to prevent them from becoming overtired and fussy, says Rachel Mitchell, a maternity and pediatric sleep consultant, founder of My Sweet Sleeper and mom of seven.

Wake windows by age chart

Here’s a chart showing baby wake windows by age, from newborn wake windows all the way to 12 months old.

How to time baby’s wake windows at first

When using these wake-window by age ranges, keep in mind that baby’s shortest wake window is typically the first (when they wake up in the morning), and their longest wake window is right before bed, notes Mitchell. So a 4-month-old might go down for their first nap around one-and-a-half hours after they wake up that morning and go to sleep for the night about two-and-a-half hours after they wake up from their last nap.

Wait—Do I Have to Follow Wake Windows?

Not necessarily. It’s true that some parents don’t follow wake windows at all—instead, they use sleepy cues (more on that below!) with a routine like “eat play sleep,” rather than a strict baby schedule.

“Instead of focusing on exact minute-by-minute periods, we build baby’s day around predictable cycles: feeding, activity and rest,” explains Laura Hunter, LPN, co-founder of Moms on Call, pediatric nurse and mom of five. “This rhythm creates consistency without the pressure of constantly trying to figure out the time of the next nap.” At the end of the day, you should do what works for you and baby.

How to Spot Baby’s Sleepy Cues

Whether or not you use wake windows, it’s useful to follow baby’s sleepy cues to see if they’re ready for a nap or bedtime. “I like parents to use both sleepy cues and wake windows together,” says sleep consultant Becerra. “Wake windows give you a helpful framework, while sleepy cues tell you how your specific baby is handling the day.”

Common baby sleepy cues include:

• Yawning
• Rubbing their eyes
• Pulling at their ears
• Moving their head from side to side
• Looking “zoned out”
• Red eyebrows
• Fussing
• Crying
• Arching their back
• Refusing the breast or bottle
• Losing interest in play

When baby starts showing two to three of these signs, it likely means it’s time for them to drift off to dreamland. That’s your cue to start the naptime or bedtime routine, as long as it’s close to or within an appropriate wake window, advises Mitchell.

If baby’s displaying sleepy cues but their wake window is still pretty far off, Becerra says she doesn’t recommend putting them down quite yet. Instead, you can change baby to a quieter “wind-down” activity.

On the other hand, if baby’s been sleepy for a while, they may start to get into that dreaded overtired territory. Signs of an overtired baby, according to Dr. Jenelle Ferry, MD, a board-certified neonatologist and director of feeding, nutrition and infant development at Pediatrix Medical Group, are even more exaggerated than regular sleepy cues, and also include shorter, more fragmented naps and tired-to-wired behavior.

If baby shows signs of being overtired, it likely means their wake window is too long, says Dr. Ferry. “Follow cues for sleep, as this is more crucial for brain development than a specific period of time for being awake,” she advises.

When and How to Adjust Baby’s Wake Window

As baby gets older, they’ll be able to stay awake longer and you’ll need to adjust their wake windows. “Wake windows gradually lengthen as babies mature neurologically and become able to tolerate more awake time,” explains Becerra.

Some common signs baby’s ready for longer wake windows include:

• Fighting naps
• Taking short naps consistently
• Taking a long time to fall asleep (aka resisting bedtime)
• Split nights or increased night waking

“Sometimes babies simply aren’t tired enough for sleep yet and need a little more awake time,” Becerra adds.

At times, you may need to shorten wake windows based on how long baby naps. “My rule of thumb is that if baby naps 40 to 45 minutes or less, shorten the next wake window by about 45 minutes (or in some cases up to an hour) to prevent baby from becoming overtired,” advises Mitchell. “If your little one were to only sleep 20 minutes, for example, following a full wake window (based on their age) would most certainly result in a cranky, overtired baby, which causes a cycle of short naps.”

Real Parents on Navigating Wake Windows

Parents have lots of different opinions on wake windows: They work for some, but not for others. Here, parents tell us exactly how they dealt with wake windows.

Christine Carpenter, contributing editor at The Bump and mom of two

“I definitely used wake windows more with my second baby. My first had reflux, so we were much more focused on keeping him upright than following any kind of schedule. With my second, though, the focus was sleep. I used wake windows mostly for naps, and I found them really helpful. Whenever they suddenly seemed to stop working, it was usually a sign that he was ready for longer wake stretches. In that way, they actually made those transitions feel a lot easier and more intuitive.”

Lauren Barth, associate content director at The Bump and mom of three

“I didn’t strictly follow age-by-age wake windows per se, but I was a huge proponent of ‘eat-play-sleep’ from Day 1. And, slowly but surely, ‘play’ would stretch out into longer periods of baby being awake. That really helped give those early days a pattern to follow and a routine to expect.”

Betsy M., mom of one in Alexandria, Virginia

“I think having clear guidance on wake windows was helpful for our family since I didn’t have a nap-on-the-go kind of baby. My son needed to be in a dark room with his noise machine in a swaddle in order to nap.”

Kaitlynn Blyth, mom of two and owner and founder of Happy Day Play in the NYC area

“The hardest part about wake windows was always navigating developmental transitions and figuring out when the old nap schedule no longer worked while trying to create a new routine before overtired meltdowns hit. Just when I felt like we had finally settled into a rhythm, everything would change again. I’d always have to reassure myself all of this was normal and this too shall pass.”

When to Stop Following Wake Windows

Many parents gradually phase out wake windows as baby’s sleep matures over the course of their first year of life. “Overall, tracking wake windows becomes less relevant as the circadian system matures and the sleep consolidates into more predictable and clock-based patterns,” says Dr. Ferry.

When, exactly, this maturation happens varies from baby to baby, but it can start around 5 or 6 months, “and by 9 months old naptime can often shift toward more clock-based scheduling,” Dr. Ferry adds. As baby becomes a toddler who takes just one nap a day (sob!), you can probably phase out wake windows entirely and go by a daily schedule instead.

To Sum It Up

Baby wake windows can be a useful tool in helping baby—and the entire family—sleep better. If you follow them, it’s important to use them to your advantage—and not let them stress you out. They can give you a pattern to look for within the day—but life happens. “There’ll be times that you miss that ideal window, and that’s okay,” says sleep consultant Mitchell. “Give yourself some grace. Wake windows aren’t a perfect science. Just remember to stay consistent and give things time to stick.”

How We Developed This Article

Some new parents swear by baby wake windows, while others base baby’s schedule exclusively on sleepy cues. To learn about how using wake windows can help baby sleep, we interviewed two pediatricians, a pediatric nurse and two certified pediatric sleep consultants. We also spoke with real moms, including two of our editors (three if you count the author of this article!), who’ve each navigated wake windows in their own way. After editing, this article was vetted through fact-check and reviewed by our pediatrician medical adviser. Learn more about how we ensure the accuracy of our content through our editorial and medical review process.

About the author: Natalie Gontcharova is the senior editor at The Bump and the mom of a (now 4-year-old) son who finally started sleeping through the night at around 18 months. While wake windows worked great until he was about 6 months old, she eventually threw out the schedule and decided to go with the flow.

Please note: The Bump and the materials and information it contains are not intended to, and do not constitute, medical or other health advice or diagnosis and should not be used as such. You should always consult with a qualified physician or health professional about your specific circumstances.