Early morning wake ups are one of the most common baby sleep problems parents face — and one of the most frustrating. If your baby is consistently waking before 6:00 am, there is almost always a fixable reason behind it.
This guide covers the five most common causes of early wake ups in babies and toddlers, with actionable solutions for each and an important bonus you don’t want to overlook. Whether your baby is 4 months or 2 years old, one of these five reasons is likely at the root of those 5:00 am mornings.
What counts as an early wake up for a baby?
Any wake up before 6:00 am is generally considered an early wake up. The goal for most babies and toddlers is a wake time between 6:00 and 7:30 am. Anything earlier is worth troubleshooting. This is based on common sleep patterns and a child’s circadian rhythm.
Reason 1: Your Baby Is Overtired
Overtiredness is the most common and most overlooked cause of early morning wake ups in babies.
This seems counterintuitive — if a baby is tired, shouldn't they sleep longer? Not always. When a baby is overtired, they enter the lighter stages of early morning sleep in a heightened state and struggle to settle back down. They surface between sleep cycles and cannot self-soothe back to sleep the way a well-rested baby can.
There are two types of overtiredness to be aware of. Chronic overtiredness develops over days or weeks of missed naps, too-late bedtimes, or frequent night wakings. It is usually accompanied by other sleep issues like short naps, difficulty falling asleep, and frequent night waking. Acute overtiredness happens to a baby who normally sleeps well but has missed a nap or been kept awake too long before bed — and can cause a single early wake up as a result.
How much daytime sleep does your baby need?
The recommended total daytime nap sleep by age is as follows: babies 3 to 6 months need 3 to 4 hours of total daytime sleep, babies 6 to 9 months need 2 to 3 hours, and babies 9 months to 3.5 years need 1.5 to 3 hours. Most children drop the nap entirely between ages 3 and 4.
🔗Grab our Sleep Summary By Age Chart here →
Is a late bedtime causing early wake ups?
Yes — a bedtime that is too late is one of the leading causes of 5:00 am wake ups. Many parents set bedtime based on a fixed clock time or when a partner gets home, but bedtime should be based on when your baby woke from their last nap. Keeping a baby awake too long before bed creates overtiredness that drives early waking.
What to do: Try moving bedtime earlier by 15 to 30 minutes. It feels counterintuitive, but an earlier bedtime often leads to a later morning wake up, not an earlier one. Log your baby's sleep in 24-hour blocks to track total sleep and identify patterns. You’re trying to get ~ 11 hours of overnight sleep after 4 months of age.
Reason 2: Teething — Or Is It?
Teething is one of the most common explanations parents reach for when their baby starts waking early — and honestly, it is an easy, tangible thing to point to. But a landmark 2025 study published in The Journal of Pediatrics, co-authored by economist and parenting researcher Emily Oster and conducted using Nanit's objective video sleep monitoring technology, found something surprising: there were no significant differences in sleep between teething and non-teething nights — even though more than half of the parents in the study reported the opposite.
As Oster put it: "These results show that teething is not at fault for poor sleep. If teething is not the problem, this assumption can lead to other explanations being ignored."
What this means for you practically is important. If your baby is waking early and you have assumed teething is the cause, it may be worth looking more closely at the other five reasons in this post — particularly sleep environment, overtiredness, and self-soothing skills. Misattributing early wake ups to teething can delay you from finding and fixing the real cause.
That said, individual babies are individual babies. If your child is visibly in discomfort and waking consistently around the time a tooth is emerging, it is reasonable to address the discomfort. Just do not stop there — because the data suggests the tooth itself is likely not what is keeping them awake.
Reason 3: Motor Development Milestones
When your baby starts rolling, crawling, pulling to stand, or taking first steps, you may notice their sleep — including early morning wake ups — gets temporarily worse before it gets better. This is not a coincidence, and it is not in your head.
Research by Professor Anat Scher at the University of Haifa, published in the Monographs of the Society for Research in Child Development (2015), tracked 28 healthy infants from 5 to 11 months using objective actigraphy sleep monitoring. The study found that sleep disruption was directly and temporally linked to the onset of crawling — with babies waking an average of 1.98 times per night once crawling began, compared to 1.55 times per night in the weeks before. A second study from the same research group found an identical pattern with the pulling-to-stand milestone later in the first year.
Why does this happen? The brain does not stop working on a new motor skill when your baby falls asleep. Research on sleep-dependent motor learning shows that the sleeping brain is actively consolidating and rehearsing new physical skills overnight — which increases neurological arousal and can disrupt the lighter stages of early morning sleep.
The easiest way to understand what your baby is experiencing is to think about your own sleep. Have you ever gone to bed with something unresolved on your mind — a problem at work, a difficult conversation you need to have, a decision you are turning over — and found yourself wide awake at 5:00am, brain already running? You did not choose to wake up. You surfaced naturally between sleep cycles, the way we all do, but instead of drifting back down your brain latched onto something it was still actively processing and would not let go. The harder you tried to relax, the more alert you felt.
Your baby is experiencing something remarkably similar. Their brain is not processing a work deadline — it is processing the entirely new physical experience of moving their body through space in a way it has never done before. Crawling, pulling to stand, walking — these are not small updates. They are complete reorganizations of how your baby understands and navigates the world. The sleeping brain treats them with the same urgency your brain gives to the things that keep you up at night. Your baby surfaces in that light early morning window, their motor cortex is still buzzing with the work it has been doing all night, and settling back down becomes genuinely difficult — not because anything is wrong, but because something very right is happening.
As Dr. Dina Cohen, who led the crawling study, explains: "Crawling involves a vast range of changes and psychological reorganization in the babies' development, increases their level of arousal, influences their ability to regulate themselves, and causes a period of temporary instability that expresses itself in waking up more frequently."
The most reassuring finding from this research is the timeline: within approximately three months of a new motor milestone, most babies return to their pre-milestone sleep patterns. The disruption is real, but it is temporary and developmentally normal.
You are most likely to see motor-related early wake ups around 7 to 9 months with crawling, and again around 9 to 12 months with pulling to stand. Additional disruptions can appear around 18 and 22 months as walking and running become more complex.
What to do: Give your baby as much opportunity as possible to practice the new skill during the day so the brain has less need to rehearse it overnight. Protect daytime naps to compensate for the fragmented nights. And remember — this phase is time-limited. The research confirms it.
Reason 4: Sleep Environment
Environmental factors are responsible for a significant portion of early morning wake ups — and they are among the easiest to fix.
In the early morning hours, babies are in the lightest stage of their sleep cycle. This makes them far more sensitive to environmental disruptions than they would be at midnight. Four environmental factors most commonly drive early waking.
Sound is one of the most common triggers. Garbage trucks, birds, a partner's alarm, or a creaking house can be enough to pull a baby out of a light sleep between 4:30 and 6:00 am. White noise set to play continuously through the night — or programmed to run in the early morning hours — helps mask these unpredictable sounds. The Hatch Rest is a reliable option because it can be controlled from your phone and scheduled to run during the early morning window without playing all night.
🔗Shop the Hatch Rest →
Light is the most underestimated trigger, particularly in spring and summer when sunrise happens early. Light is about distraction. A room that is not fully dark can cause earlier wake ups — full stop. Blackout curtains or blinds that help minimize visual distractions are one of the highest-impact changes you can make to a sleep environment. Sleepout Curtains are a highly recommended option for a fully dark room.
Temperature is particularly relevant in early morning hours. Body temperature naturally drops as part of the circadian rhythm in the predawn hours, and if the room is also cold, it becomes a compounding factor. According to the National Sleep Foundation, the ideal sleep temperature is between 65 and 70°F (18 to 21°C). Early wake ups linked to temperature most commonly appear during seasonal transitions — spring when the furnace has been turned off, or fall before it has been turned on. Because babies and toddlers consistently kick off blankets overnight, the best solution is a wearable sleep sack made from a naturally temperature-regulating fabric. We recommend the @Woolino sleep sack, made from 100% merino wool, which is uniquely effective at both warming and releasing heat as temperatures shift — meaning it works year-round and handles those early morning temperature drops without any intervention needed. It fits from 2 months to 2 years, so there is no need to replace it as your baby grows.
Hunger can also trigger early waking, particularly in younger babies. If hunger is a suspected factor, consider a dream feed between 2:00 am and 4:00 am to reduce the likelihood of a hunger-driven early wake up.
Reason 5: Habitual Early Waking
If your baby's early wake ups started due to teething or a developmental leap but never stopped after the cause was resolved, you are likely dealing with a habitual early wake up.
The body is a creature of habit. Once a baby has been waking consistently at a certain time — even for a legitimate reason — their circadian rhythm adapts to that pattern and continues it. This is the same reason adults who commute early in the week often wake before their alarm on weekends.
What is a habitual wake up? It is a wake up that occurs at a consistent time regardless of bedtime, nap schedule, or environmental factors — and has persisted for more than two weeks after the original cause has resolved.
What to do for a habitual early wake up:
The first step is to ask whether the behavior is being reinforced. Bringing your baby into bed, feeding them back to sleep as a way to soothe rather than true hunger, watching TV together, or providing any form of stimulating reward at 5:00 am teaches the body that this wake time leads to something enjoyable. That cycle is very difficult to break — especially in toddlers — without intentionally changing the response. When you eat, also influences your body’s circadian rhythm.
The "wake to sleep" technique is a common first approach. It involves gently rousing your baby slightly — without fully waking them — approximately 30 to 60 minutes before their habitual wake time, which disrupts the sleep cycle and can shift the natural surfacing time later. This works well for some families but not all.
🔗Read more about Wake to Sleep here→
For toddlers, establishing clear expectations and boundaries is essential. A visual sleep cue like the Hatch Rest — which can be set to display a nighttime image until your chosen wake time and a morning image when it is okay to get up — is one of the most effective tools available for children 18 months and older. Children begin understanding cause and effect around 18 months and rewards-based systems around 2.5 years, making this an age-appropriate intervention.
As a firm rule, do not get your baby up for the day before 6:00 am. Treat anything before 6:00 am the same way you would a middle-of-the-night waking — the message should be consistent: it is not morning yet.
When 6 am or later rolls around, a dramatic wake up — opening curtains, turning on lights, using a cheerful and energized tone — should happen at 6:00 am and not before. This signals clearly to your baby who decides when the day starts.
Will early wake ups resolve on their own?
Sometimes. If the root cause is teething or a developmental leap, the early waking often resolves once that trigger passes — typically within one to three weeks. However, if the behavior has become habitual or is being reinforced by a rewarding response, it is unlikely to resolve without a deliberate intervention.
For persistent habitual wake ups that do not respond to these techniques, a formal sleep training approach may be necessary, using whichever method aligns with your parenting style — whether that is staying in the room with a consistent verbal cue, interval-based check-ins, or full extinction. Keep your baby in a crib for as long as possible, ideally until at least 2.5 to 3 years of age. Moving a child with a habitual early wake up to a toddler bed before they are developmentally ready to understand and respect boundaries makes the habit significantly harder to break.
Most people don’t have a night waking problem. They actually have a falling asleep problem, where falling asleep is associated with a parent, rocking, sucking, swinging or being held.
Summary: Quick Reference Guide
The five most common reasons babies wake up too early are overtiredness (often from a bedtime that is too late), teething discomfort, motor development milestones, sleep environment factors (sound, light, cold, or hunger), and habitual early waking reinforced over time. Each has specific, actionable solutions — and in most cases, identifying and addressing the root cause will result in meaningful improvement within one to two weeks.
BONUS Reason 6: Lack of Self-Soothing Skills
If your baby consistently wakes early and cannot get back to sleep independently, the missing piece may not be the reason they woke up — it may be that they never learned how to fall back asleep on their own.
Every baby — and every adult — naturally surfaces between sleep cycles. This is not a malfunction. It is how sleep is designed to work. A typical night's sleep consists of four to five sleep cycles, each lasting roughly 90 to 110 minutes. As the night progresses, the balance shifts: deep NREM sleep dominates the early part of the night, while REM sleep — the lightest, most active stage — becomes increasingly dominant in the second half. This is why the early morning hours between roughly 4:00am and 6:00am are when sleep is at its absolute lightest, and why the brief arousals that happen between every cycle are most likely to tip into a full wake up during that window rather than at 10:00pm.
Research by Professor Thomas Anders at UC Davis, using objective video somnography to monitor infants across the first year of life, found that all infants wake multiple times throughout the night — and that no infant truly sleeps through the night in the way parents understand that phrase. What separates a baby who appears to sleep through from one who calls out repeatedly is not whether they wake up — it is what they do when they wake up. Anders' research identified two distinct types of nighttime awakening: signaled awakenings, in which the baby cries and requires a parental response, and self-soothing awakenings, in which the baby stirs, settles independently, and returns to sleep — a process the parent never even sees. When self-soothing awakenings predominate, parents report that their baby is sleeping through the night. When signaled awakenings predominate, they report a baby with a sleep problem. In many cases, the number of awakenings is identical. The difference is entirely in the skill set the baby has available to them when they surface.
This is also where sleep associations become critical. Anders' research found that the connection runs directly from bedtime to early morning: "Infants who had learned to fall asleep at the beginning of the night were able to repeat this behavior in the middle of the night. They had learned how to self-soothe after a nighttime awakening." In other words, if your baby relies on a breast, bottle, pacifier, or being rocked to fall asleep at bedtime, they will need that same condition recreated at 5:00am when they surface. They are not choosing to wake up early — they genuinely do not yet have the skill set to do anything else. The 5:00am wake up and the bedtime routine are connected.
Resources Sleep Cycles and Self-Soothing (Thomas Anders)
- Physiology, Sleep Stages — StatPearls, National Library of Medicine: https://ncbi.nlm.nih.gov/books/NBK526132
- From Ontogenesis to Clinical Practice: Waking Up to Infant Sleep — Anders 2023, Sleep Advances: https://pmc.ncbi.nlm.nih.gov/articles/PMC10104392
- Night Waking, Sleep-Wake Organization and Self-Soothing in the First Year of Life — Anders: https://pmc.ncbi.nlm.nih.gov/articles/PMC1201414
- Nighttime Sleep-Wake Patterns and Self-Soothing from Birth to One Year — Anders longitudinal study: https://pmc.ncbi.nlm.nih.gov/articles/PMC1201415/
How do you know if self-soothing is the issue? Ask yourself how your baby falls asleep at the start of the night. If the answer involves active help from you — feeding, rocking, holding to “relaxed”, replacing a pacifier — then the early wake up is very likely a self-soothing issue, not purely an environmental or developmental one.
What to do:
Teaching self-soothing skills starts at bedtime, not at 5:00am. Trying to address early rising in the early morning hours — when everyone is exhausted and the pressure to just make it stop is at its highest — is one of the hardest ways to approach this. Instead, focus on giving your baby the opportunity to fall asleep independently at the start of the night. When they can do that consistently, the early morning surfacing episodes become much shorter and quieter — and often disappear entirely.
Self-soothing can be introduced as early as 4 months of age, when babies begin to develop more consolidated sleep cycles. The approach you take — whether gradual, interval-based, or full extinction — matters less than the consistency with which you apply it. A baby who experiences a different response every time they wake will take significantly longer to develop independent sleep skills than one who receives a predictable, consistent message.
It is also worth noting that self-soothing skills interact with almost every other reason on this list. An overtired baby has a harder time self-soothing. A baby in a poorly optimized sleep environment has more sensory input pulling them out of sleep before self-soothing can kick in. A baby going through a motor leap is more neurologically activated and finds it harder to settle. Teaching self-soothing does not eliminate these triggers — but it gives your baby the tool to navigate them without your help.
For a full breakdown of your sleep training options learn more through this reads,
🔗 The Helping Babies Sleep Method
🔗 The Two Phases of Sleep Training
🔗 Why Sleep Training Fails Without Fixing Feeding First
🔗 The Feeding and Sleep Connection
🔗 Comparing The Helping Babies Sleep Method vs Ferber vs CIO
🔗 Why Drowsy But Awake Fails Long Term
🔗 How the Snacking Cycle Might Be Hurting Your Night Sleep
Frequently Asked Questions
What counts as early rising in a baby?
Early rising is generally defined as any wake up that falls before 6:00am. After 6:00am, that is simply morning — and while it may feel early to you, it is a biologically normal and developmentally appropriate wake time for most babies and toddlers. The sweet spot for a manageable start to the day sits between 6:00am and 7:00am for most families. This is also why kids have ‘early bedtimes.” Keeping them up later doesn’t get them to “sleep in.”
Why does my baby always wake up at 5:00am?
5:00am sits right at the end of the night's final sleep cycle, when cortisol is being produced for the day to get their bodies up and sleep is at its lightest. At that point, even a small trigger — a noise, a sliver of light, a temperature change, or a missing sleep association — is enough to tip your baby from a light stir into a full wake up. Distraction is a huge culprit. The inability to relax back down into sleep with low sleep pressure. The reasons outlined in this post are the most common culprits to work through systematically.
Will putting my baby to bed later fix early rising?
In most cases, no — and it often makes it worse. A later bedtime without adequate daytime sleep to support it creates overtiredness, which increases cortisol and actually makes early rising more likely, not less. For most babies under 18 months, an earlier bedtime in the 6:30pm to 7:30pm range is the more effective starting point but you also want to think about that time in relationship to when the last nap ended.
How long does early rising last during a developmental leap?
Research on motor milestone-related sleep disruption suggests that most babies return to their pre-leap sleep patterns within approximately three months of a new skill emerging. The disruption is real and it is neurologically driven — but it is time-limited. Supporting your baby with good sleep foundations and plenty of daytime practice of the new skill is the most effective way to shorten the window.
Could my baby genuinely just be an early riser?
Yes, and it is worth knowing that chronotype — your natural tendency toward earlier or later sleep timing — is strongly influenced by genetics. Some babies are biologically wired to wake early regardless of what you do, but we’re talking 6:00 am not 5:00 am. 5:00 am we treat like a night waking. You can also consider the amount of night sleep that’s occurred. A baby who has slept 11 hours because they slept at 6 pm and woke up at 5 am is likely done sleeping for the night. That’s a schedule shifting issue, not an early wake up. That said, before accepting early rising as fixed, it is worth systematically ruling out the six causes in this post. True chronotype-driven early rising is relatively uncommon in babies; schedule, environment, and self-soothing skills are far more frequently the cause.
Am I making early rising worse by responding to it?
Potentially, yes — but the answer depends on how you are responding and how consistently. A consistent response to an early wake up — a feed, bringing your baby into bed, starting the day — can reinforce the wake time over days and weeks, effectively training the body clock to anticipate and prepare for waking at that hour. This is what we mean by habitual waking in Reason 5. The fix is not ignoring your baby — it is changing the nature and consistency of the response.
Is 4:00am a night wake or an early morning wake?
4:00am and 5:00 am is a night wake and should be treated as one — dark room, minimal interaction, no starting the day. It is a common mistake to treat 4:00am or 4:30am as the beginning of morning, but doing so consistently can lock in that wake time over the following days and weeks. The goal is to hold the start-of-day signal until at least 6:00am.
At what age can I start working on early rising?
Sleep foundations — including the bedtime environment, consistent sleep timing, and the opportunity to fall asleep independently — can be introduced from around 4 months of age, when sleep cycles begin to consolidate. You do not need to wait until your baby is older to start laying the groundwork. In fact, earlier is generally easier, before strong sleep associations and habitual patterns have had time to entrench.
