At 11 months old, waking during the night is still common and usually driven by a combination of developmental changes, not a single fixable problem. Separation anxiety peaks right around this age, new motor skills keep the brain buzzing, and sleep habits formed earlier in infancy can create a cycle of waking that feels impossible to break. The good news: most of these causes are temporary, and understanding what’s behind the wake-ups makes them much easier to address.
Separation Anxiety Peaks at This Age
Between 10 and 18 months, babies go through the most intense phase of separation anxiety. For the first time, your baby truly understands that you exist even when you’re not in the room. That sounds like a cognitive win, but at night it creates a problem: when your baby wakes between sleep cycles and realizes you’re somewhere else, they have no concept of when, or even whether, you’ll come back. That uncertainty causes genuine distress.
You’ll notice this most at bedtime, when your baby may fight being put down, and again during middle-of-the-night wake-ups when they call out or cry until you appear. Separation anxiety tends to be worse when your baby is overtired, hungry, or feeling sick. It isn’t something you caused, and it isn’t something you can skip over. It fades naturally in the second half of the second year as your child develops a better sense of time and routine.
New Motor Skills Disrupt Sleep
Around 11 months, most babies are pulling to stand, cruising along furniture, or working on their first steps. These milestones are exciting during the day, but the brain doesn’t stop practicing at night. It’s common for babies to wake up, pull themselves to standing in the crib, and then not know how to get back down. Even if they don’t physically get up, the neurological activity involved in mastering a new skill can make sleep lighter and more fragmented.
This type of disruption is temporary. Once the skill becomes automatic rather than novel, sleep typically improves on its own within a week or two. In the meantime, giving your baby plenty of floor time during the day to practice standing and sitting back down can help the transition happen faster.
Sleep Associations Keep the Cycle Going
This is the factor parents have the most control over, and it’s often the biggest one. Babies cycle through light and deep sleep roughly every 60 to 90 minutes. At the end of each cycle, they briefly surface toward wakefulness. If your baby has learned to fall asleep with a specific condition (nursing, rocking, a bottle, being held), they often need that same condition recreated every time they hit a light-sleep phase. That can mean waking you four, five, or six times a night, not because something is wrong, but because they haven’t learned to bridge sleep cycles independently.
The core strategy is to put your baby down drowsy but not fully asleep, so the crib is the last thing they experience before drifting off. If your baby has always nursed or bottle-fed to sleep, they’ll need time and support to learn a new way. Try ending the feeding before your baby is completely asleep and placing them in the crib while they’re still slightly aware. Over several nights, this teaches them that sleep starts in their bed rather than in your arms.
When your baby fusses or makes sounds during the night, wait a few minutes before responding. Many babies will resettle on their own if given the chance. Learning to self-soothe is what allows a baby to move through sleep cycles without fully waking and calling for help.
Night Feeds May No Longer Be Necessary
By 10 to 12 months, most babies can get all the calories they need during the day. Breastfed babies at this age typically need zero to two nighttime feeds, and formula-fed babies need zero to one. If your baby is still waking multiple times to eat, there’s a good chance at least some of those feeds are comfort-based rather than hunger-based. The feeding has become part of the sleep association rather than a nutritional requirement.
That doesn’t mean you need to cut night feeds cold turkey. If your baby is waking to eat three or four times, try gradually reducing to one feed per night. During the day, make sure your baby is getting enough solid food and milk to compensate. Some babies genuinely feel hungry at night because their daytime intake hasn’t caught up yet, so adjusting the daytime schedule is a necessary first step. Once calorie needs are fully met during waking hours, the nighttime wake-ups tied to feeding tend to resolve.
Teething Might Not Be the Culprit
Teething is the most common explanation parents reach for, but the evidence suggests it plays a smaller role than most people assume. A longitudinal study published in The Journal of Pediatrics found no significant differences in sleep quality between teething nights and non-teething nights. An earlier study found no changes in sleep on the day a tooth erupted or the five nights before it.
That doesn’t mean teething never causes discomfort. But if your baby has been waking consistently for weeks, teething is unlikely to be the primary explanation. It’s worth looking at sleep associations, scheduling, and separation anxiety first, since those factors affect every single night rather than the occasional rough stretch.
Schedule Problems That Cause Night Waking
At 11 months, most babies need about 3 to 3.75 hours of awake time between sleep periods, with the longest stretch happening before bedtime. If wake windows are too short, your baby won’t have enough sleep pressure to stay asleep through the night. If they’re too long, overtiredness kicks in and paradoxically makes sleep worse, not better.
Most 11-month-olds still need two naps per day. If your baby has started resisting the second nap, it’s tempting to drop down to one, but doing so too early can backfire. Dropping a nap prematurely leads to significant overtiredness, which commonly shows up as increased night waking and early morning wake-ups. True readiness for one nap usually doesn’t arrive until closer to 14 or 15 months for most children. Signs that the transition is genuinely needed include consistently skipping the second nap, taking much shorter naps than usual, and getting fewer than 10 hours of nighttime sleep on a two-nap schedule. If your baby resists a nap one day but sleeps fine the next, that’s normal variability, not a signal to change the schedule.
Try gradually stretching wake windows to the 3.5 to 3.75 hour range if your baby is fighting naps. Even a 15-minute adjustment can make a noticeable difference in how easily they fall asleep and how long they stay asleep at night.
Room Environment Matters More Than You Think
Keep the room between 68 and 72 degrees Fahrenheit for the deepest, most comfortable sleep. A fan on low serves double duty: it keeps air circulating and provides consistent white noise that can mask household sounds during light-sleep phases. Darkness matters too. Even small amounts of light from a hallway or streetlamp can signal wakefulness to a baby’s brain. Blackout curtains or shades are one of the simplest changes that often produce noticeable results.
Putting It All Together
When an 11-month-old isn’t sleeping through the night, it’s rarely one thing. Separation anxiety makes them want you close. New motor skills make their brain restless. Sleep associations mean they need your help to fall back asleep every 60 to 90 minutes. And a schedule that’s slightly off can amplify all of it.
Start with the factor you can change most directly: how your baby falls asleep at bedtime. If they can learn to drift off independently in their crib, they’ll be far more likely to reconnect sleep cycles on their own at 2 a.m. From there, check that wake windows are in the 3 to 3.75 hour range, daytime calories are sufficient, and the room is dark, cool, and quiet. The developmental factors (separation anxiety, motor milestones) will resolve on their own timeline, but fixing the controllable pieces means those phases cause a rough few nights rather than a rough few months.