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One minute, it seems like your little one is living their best life. They’re staring at the ceiling fan, sucking on their tiny fist, and filling the room with their precious cooing. But then they start crying at the top of their little lungs, leaving you to wonder why. 

Is it a sudden chill in the air, a personal vendetta against the ceiling fan, or simply fatigue?

Chances are, as a busy parent, you may have missed a few signs that your baby is ready for sleep. Since babies can't express themselves verbally, they rely on body language to communicate their needs, and this article will help you catch and understand them more consistently.

Snuggle up with your sweet, sleepy baby as we explore everything you need to know about baby sleep cues, including why they matter and what to watch for, as well as how to establish a healthy sleep routine for your little one.

Key takeaways

  • Understanding your baby's unique sleep cues helps prevent overtiredness and catch their ideal sleep windows.

  • A baby's sleepy signals evolve as they grow, meaning the specific signs you look for will change from the newborn phase into the toddler years.

  • Observing your little one's natural patterns helps you build a predictable, soothing bedtime routine tailored to their needs.

  • Tracking sleep data and monitoring wake windows takes the guesswork out of establishing healthy sleep habits for the entire family.

What are baby sleep cues?

Unfortunately, your newborn can’t tap you on the shoulder and say, “Hey, I'm tired!” every time they’re ready for a snooze. However, they do have their own way of communicating that that’s the case.

Instead of using words, babies express themselves and their needs through body language, via sleep and hunger cues. Simply put, these cues are the physical signs babies use to let you know they're tired. 

Have you ever noticed your little one seemingly gazing into space? That's a baby’s sleep cue. Or when they suddenly look away from moving people or objects? That’s another one.

Why is recognizing sleep cues important?

From unexpected yawns to the more obvious fussiness, your baby will almost always signal when they feel tired. If you miss those signals due to life’s usual chaos—aka every day with little people—your baby is more likely to transition from being sleepy to being overtired.

If you've never experienced an overtired baby, this might not seem like a big deal, but it definitely can be.

When a newborn or baby becomes overtired, they sometimes experience a sudden burst of energy, yet this doesn't mean they don't need a nap. Rather, it means that it might be more challenging for them to fall asleep and stay asleep.

By recognizing your little one's early sleep cues, you can comfort them and catch that sleep sweet spot before they become overtired, avoiding the fussiness, screaming, and short nap cycles that often come with it.

What do different types of sleep cues look like?

While you might not know all of the sleep cues yet, you’ll be a pro at deciphering when they’re ready for a little R&R after a short while of paying attention. Just know that not all babies use the same sleep cues. In fact, newborns often communicate differently than older babies and toddlers. 

Below, we break down some common sleepy cues to be on the lookout for, depending on your little one’s age:

Newborn sleep cues

Newborns won’t immediately know the difference between day and night. For this reason, young babies sleep sporadically until they learn to differentiate these periods, usually between 2 and 3 months old. 

During this phase, babies follow wake windows of about 30 minutes to 1.5 hours, give or take. These windows vary from baby to baby and might get a bit longer as the day goes on. 

As you learn to understand their age-appropriate wake windows, you can keep your eyes peeled for any signs of newborn sleep cues, which can be categorized into early and late stages:

  • Early sleep cues: Staring blankly, losing interest, turning their face away from people and objects, and having slightly reddish eyebrows.

  • Late sleep cues: Yawning and stretching, rubbing their eyes, pulling their ears, and arching their back.

Baby and toddler sleep cues

As your little one graduates from the newborn phase into the exciting and evolutionary world of babyhood, their sleep signals will slowly start to change into other forms of communication signals.

While they won’t change overnight, you’ll slowly start to notice the introduction of the following signals when your child is showing sleep cues between 3 and 18 months:

  • Early sleep cues: Clinginess, clumsiness, and loss of interest in playtime.

  • Late sleep cues: Demanding attention, fussiness when eating or drinking, and crying.

What to do when your baby shows sleep cues? Creating a sleep framework that helps

If you're the sleep-deprived parent of a very sporadic newborn sleeper, knowing how to deal with sleep deprivation is crucial. 

Newborns won't adhere to a strict sleeping routine because they need to feed around the clock, and a more structured sleep routine doesn't take shape until the baby moves past the newborn phase. Rest assured, this time is only temporary. 

As your baby grows older, you'll both gradually establish a feeding and sleeping routine, paving the way for good sleep habits and helping them stay asleep longer. Once your baby has checked “mastering night and day” off their to-do list, you can start utilizing their cues to establish a feeding and sleeping schedule that benefits the entire family. 

Here are some tips to help that process along

1. Home in on their sleep cues

The first step to crafting a sleepytime routine for your little one is mastering the art of recognizing their sleep cues. To do this, focus on what your baby does toward the end of their wake windows. What signs are they giving you? Are they an ear puller, an eye rubber, maybe both?

Every baby has their own way to externalize their tiredness, and with a bit of attention, you’ll start recognizing yours. 

2. Take note of your baby’s sleep patterns

After you’ve mastered what to expect when they’re sleepy, you can take mental notes that give you even more insight into what to expect when your baby is tired. Consider the following questions to help you determine your little one’s current sleep schedule:

  • How long were they awake before they showed signs of being tired?

  • What were their sleep cues?

  • How long did they sleep during their nap?

One way to ensure you’re recording your baby’s precise sleep times is to use a baby monitor that tracks your baby's movements, as well as the room’s temperature and humidity levels. Baby monitors with these advanced features can accurately track how much sleep your baby is getting and even generate personalized sleep reports you can easily access from your phone. 

3. Create a consistent and comfortable sleep environment

Beyond the newborn days, when you’re helping your baby establish the correct times for waking and sleeping, it’s useful to provide a consistent and safe sleep environment your baby can depend on day after day. 

Here are a few boxes you can check off to ensure a conducive sleep setting for your snuggly babe:

  • Choose a quiet room away from outside noise.

  • Keep the temperature between 68 and 72 degrees Fahrenheit.

  • Incorporate a Sound + Light Machine that can help gently lull your little one to sleep.

  • Use a cozy Sleeping Bag or Swaddle to keep them warm.

4. Establish a nightly bedtime routine

What better way to help your baby adjust to a sleep schedule than by creating and sticking to a nightly routine? Many babies thrive on predictability, so consider the comforting activities you do with your little one before bedtime and incorporate them into a consistent bedtime ritual. Wind-down activities can include: 

  • Giving them a warm bath.

  • Reading books together (even a few pages will do the trick).

  • Singing lullabies to them.

Activities like these help signal to your baby that it's almost time for sleep. Just keep in mind that the key to establishing an effective bedtime routine is consistency.

EMBED: https://youtu.be/K5CAN-2gAFc?si=QEeRje6zBEy4-Dcc

Sleep is easier with Nanit

Understanding your baby's sleep cues is essential for avoiding the tear-filled state of overtiredness. Once you’ve mastered this, you can move on to the next task: ensuring they (and you) get quality sleep each night.

At Nanit, we understand the importance of helping families establish healthy sleep patterns for their babies. That's why we offer a range of innovative baby monitors that use real, personalized data to keep you as informed as possible. 

Our Smart Baby Monitor System features an easy-to-use app that lets you view your baby's sleep patterns, monitor multiple children simultaneously, and capture precious milestones—all at the touch of a button.

By harnessing the power of technology and personalized data, Nanit empowers you to create a routine tailored to your baby's unique needs, ensuring both you and your little one enjoy restful nights.  

Sources:

What To Expect. Signs of a Tired Baby. https://www.whattoexpect.com/first-year/sleep/overtired-baby/ 

Better Health. Typical sleep behaviour (1) – newborns 0 to 3 months.https://www.betterhealth.vic.gov.au/health/healthyliving/typical-sleep-behaviour-nb-0-3-months 

Gloucestershire Health and Care. Sleep Cues! https://www.ghc.nhs.uk/wp-content/uploads/2020-Handy-Sleep-Guide.pdf 

Raising Children. Tired Signs in Babies and Toddlers. https://raisingchildren.net.au/babies/sleep/understanding-sleep/tired-signs 

NIH. Creating a safe sleep environment for your baby. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2724136/ 

Pediatric Sleep Counsel. Development of infant and toddler sleep patterns: Real-world data from a mobile application.https://www.babysleep.com/research/development-of-infant-and-toddler-sleep-patterns-real-world-data-from-a-mobile-application/

 

CONTRIBUTORS

Natalie Barnett, PhD serves as VP of Clinical Research at Nanit. Natalie initiated sleep research collaborations at Nanit and in her current role, Natalie oversees collaborations with researchers at hospitals and universities around the world who use the Nanit camera to better understand pediatric sleep and leads the internal sleep and development research programs at Nanit. Natalie holds a Ph.D. in Genetics from the University of New England in Australia and a Postgraduate Certificate in Pediatric Sleep Science from the University of Western Australia. Natalie was an Assistant Professor in the Neurogenetics Unit at NYU School of Medicine prior to joining Nanit. Natalie is also the voice of Nanit's science-backed, personalized sleep tips delivered to users throughout their baby's first few years.

Dr. Maristella Lucchini serves as Senior Clinical Researcher at Nanit. In her role, Maristella works to secure grant funding in collaboration with Nanit's university research partners and supports the development of the company's research collaborations around the world. Previously, Maristella served as an Assistant Research Scientist in the Division of Developmental Neuroscience, Department of Psychiatry at Columbia University Irving Medical Center where she led projects across several cohorts focusing on prenatal and perinatal health. Maristella holds a Ph.D. in Biomedical Engineering from Politecnico di Milano.

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