At 11 months old, night wakings are extremely common and almost always driven by developmental changes rather than something medically wrong. Your baby’s brain and body are going through a surge of growth right now, and that activity spills into nighttime sleep. The most likely culprits are separation anxiety (which peaks at exactly this age), new physical skills like pulling to stand, and the early onset of the 12-month sleep regression.
Separation Anxiety Peaks Right Now
Separation anxiety hits its strongest point between 10 and 18 months, which puts your 11-month-old squarely in the thick of it. Your baby now understands that you exist even when you leave the room, but doesn’t yet grasp that you’ll always come back. That combination creates real distress at bedtime and during the night.
Typical signs include waking and crying after previously sleeping through the night, refusing to fall asleep unless you’re nearby, and becoming clingy or upset when you leave the room during the day. These are all normal responses from a brain that’s developing a healthy attachment to you, not signs of a sleep problem that needs fixing. This phase is temporary, though it can last several weeks or even a couple of months before gradually easing.
The 12-Month Sleep Regression Can Start Early
Sleep regressions don’t follow a precise calendar. The one that clusters around 12 months often begins a few weeks early, which means your 11-month-old may already be in it. Around this age, babies show greater emotional engagement, increased communication, and expanded physical abilities like standing and walking with support. All of that new brain activity disrupts sleep patterns that were previously stable.
The hallmarks of this regression include waking more often during the night, being fussy and hard to settle back down, resisting bedtime with crying or agitation, and sometimes taking longer naps during the day (which then shifts their nighttime sleep). Most sleep regressions last two to six weeks, then resolve on their own as your baby’s brain integrates its new skills.
New Motor Skills Disrupt Sleep
If your baby recently learned to pull to standing or cruise along furniture, that alone can explain the night wakings. Pulling to stand and crawling are specifically linked to temporary sleep disruption in infants. What happens is straightforward: your baby wakes during a normal light-sleep cycle, practices the exciting new skill, and then can’t settle back down. Some babies literally stand up in the crib while still half asleep and then cry because they haven’t figured out how to lower themselves back down.
Giving your baby plenty of practice time during the day, especially working on sitting back down from standing, helps this phase pass faster. Once the skill becomes routine and boring, it stops hijacking sleep.
Teething May Not Be the Cause
Parents often attribute night wakings to teething, and it feels intuitive. But a longitudinal study using video monitoring found no significant differences in sleep between teething and non-teething nights. Over half the parents in the study reported sleep disturbances during teething, yet the objective recordings didn’t support those reports. This suggests that teething coincides with other developmental disruptions, and parents naturally connect the two.
That doesn’t mean teething is painless. But if your baby is waking repeatedly at night, it’s worth looking beyond the gums for an explanation.
Hunger and Daytime Calories
At 11 months, your baby needs roughly 750 to 900 calories per day, with about 400 to 500 of those still coming from breast milk or formula (around 24 ounces). If your baby isn’t eating enough solid food during the day or has recently dropped a milk feeding, genuine hunger can cause night wakings.
Take a look at what your baby is actually consuming during daytime hours. Babies this age are easily distracted during meals and may not eat as much as you think. Offering calorie-dense foods like avocado, nut butters, full-fat yogurt, and eggs during the day can help ensure your baby gets enough fuel to sleep comfortably through the night. That said, many 11-month-olds who wake at night aren’t truly hungry. They’ve simply learned that waking up means a feeding, which is a comforting routine rather than a nutritional need.
Check the Schedule and Wake Windows
An off-balance daytime schedule is one of the most fixable causes of night wakings. At 11 months, most babies need about 3 to 3.75 hours of awake time between sleep periods, and they still need two naps per day. A common mistake is dropping to one nap too early. While some babies start resisting their second nap around this age, most aren’t truly ready for one nap until at least 14 months.
If your baby is fighting naps, try stretching wake windows to 3.5 or 3.75 hours before assuming the nap itself should go. Too little daytime sleep creates an overtired baby who paradoxically sleeps worse at night. Too much daytime sleep steals from the nighttime total. The overall target is 12 to 16 hours of sleep per 24-hour period, including naps.
Room Conditions That Cause Wakings
Sometimes the answer is simpler than developmental leaps. The recommended room temperature for infant sleep is 16 to 20°C (roughly 61 to 68°F). Babies wake when they’re too warm more often than when they’re too cold. A room that feels comfortable to an adult in pajamas under a blanket is often too warm for a baby in a sleep sack. If your baby feels sweaty at the neck or chest when you check on them, the room is too hot. Light bedding or a lightweight, well-fitting sleep sack at the right room temperature is all most babies need.
Noise changes can also cause wakings. If your home gets quieter late at night (a heater cycling off, street noise dying down), your baby may wake more easily during light sleep phases. A consistent white noise source can smooth over those gaps.
When Something Medical Is Going On
Most night wakings at 11 months are developmental, but a few medical causes are worth knowing about. Ear infections are common at this age and cause pain that worsens when lying down. Signs include tugging or pulling at the ear, fever, unusual irritability, fluid draining from the ear, and loss of balance or difficulty responding to sounds. If your baby’s night wakings came on suddenly alongside any of these symptoms, an ear infection is a real possibility.
Illness in general, including colds and respiratory congestion, disrupts sleep simply because lying flat makes breathing harder. These causes tend to be obvious during the daytime too, not just at night. If your baby seems perfectly happy and healthy during the day but wakes frequently at night, a medical cause is unlikely.