Most 6-month-olds sleep about 9 to 12 hours at night, though not all of that is uninterrupted. The average in one study of 93 infants was just over 9 hours of nighttime sleep, measured between 7 PM and 7 AM. Some babies at this age clock closer to 5 hours, while others stretch past 11. That’s a wide range, and where your baby falls depends on their individual development, feeding patterns, and how well their internal clock has matured.
Nighttime Sleep at 6 Months
By 6 months, most babies are capable of sleeping at least 6 to 8 hours in a single continuous stretch. Many will sleep 9 hours or longer at night with brief awakenings in between. Those brief wake-ups are normal and don’t necessarily mean something is wrong. Babies cycle through light and deep sleep phases more quickly than adults, and they often stir, fuss for a moment, and fall back asleep on their own.
The total recommended sleep for a baby between 4 and 12 months is 12 to 16 hours per day, combining nighttime sleep and naps. If your baby is getting around 9 to 10 hours overnight and another 3 hours during the day, they’re landing right in the middle of that range.
Why Some Babies Still Wake Up
A 6-month-old’s circadian rhythm, the internal system that separates day from night, is still a work in progress. The body’s sleep-wake cycle starts appearing around 2 to 3 months, but it doesn’t fully stabilize until somewhere between 6 and 18 months. Melatonin production, which drives sleepiness at night, begins at the end of the newborn period and gradually strengthens over the first year. So your baby’s body is physically learning how to consolidate sleep into longer stretches, and some babies get there faster than others.
Developmental milestones also play a role. Around 6 months, babies are learning to roll, sit up, and may start pulling to a standing position. These new physical skills can temporarily disrupt sleep because babies sometimes practice them in the crib, wake themselves up, and then can’t settle back down. This kind of disruption is usually short-lived, lasting days to a couple of weeks.
Night Feedings at This Age
Most 6-month-olds no longer need to eat during the night from a nutritional standpoint. Their caloric needs can typically be met during daytime hours, especially once solid foods are being introduced. UCSF Benioff Children’s Hospitals notes that most babies who still wake to feed at night are doing so out of habit rather than hunger.
That said, night weaning is a gradual process, and the right timing varies. Before 6 months, night feeding is generally encouraged, and behavioral interventions to reduce it may not be developmentally appropriate. After 6 months, reducing nighttime feeds tends to be safe for healthy, normally growing babies. One study found that infants over 6 months who were fed less frequently at night had healthier weight trajectories by 12 months, which supports the idea that night weaning after this age aligns well with most babies’ development.
If your baby is still waking once or twice to eat, that’s common and not a cause for concern. But if you’re hoping to move toward longer uninterrupted stretches, 6 months is generally a reasonable age to start.
Daytime Naps and How They Affect the Night
At 6 months, most babies take 3 naps a day, totaling about 2.5 to 3.5 hours of daytime sleep. The first two naps are usually the longest, around 60 to 90 minutes each, while the third nap is shorter, typically 30 to 45 minutes. That third nap often disappears within the next month or two as babies consolidate their daytime sleep into two longer naps.
Daytime sleep and nighttime sleep are connected. Too little napping during the day can leave a baby overtired and paradoxically harder to settle at night. Too much daytime sleep can cut into nighttime hours. If your baby is consistently sleeping less than 9 hours at night, it’s worth looking at whether naps are too long, too late in the day, or too short and leaving them wired by bedtime.
Building Better Nighttime Sleep
Six months is a good age to establish consistent sleep habits if you haven’t already. One of the most effective strategies is putting your baby down drowsy but still awake. This helps them learn to fall asleep independently, which means that when they naturally wake between sleep cycles at night, they’re more likely to resettle without calling for you.
A predictable bedtime routine signals to your baby’s developing circadian system that nighttime is coming. This doesn’t need to be elaborate. A bath, a feeding, a short book or song, and then into the crib in a dark, quiet room is plenty. Consistency matters more than the specific activities.
Light exposure during the day also helps reinforce the circadian rhythm. Bright light in the morning and natural daylight during awake periods help your baby’s internal clock distinguish day from night more clearly. Keeping the environment dim in the hour before bed and during any nighttime wake-ups reinforces the signal that darkness means sleep.
Once your baby can roll both directions, from back to tummy and tummy to back, you no longer need to reposition them if they flip during sleep. You should, however, remove any mobiles or hanging crib toys by around 5 months, since babies start pulling up around this time and these items become a safety risk.
What “Sleeping Through the Night” Actually Means
In sleep research, “sleeping through the night” typically means a stretch of 6 to 8 hours, not the 10 or 11 hours an adult might picture. By that definition, most 6-month-olds are capable of sleeping through the night. But capable doesn’t mean every baby does it consistently. Night wakings at this age are still developmentally normal, even if they’re not nutritionally necessary.
The range of normal is genuinely wide. In the study of 6- to 7-month-olds, nighttime sleep ranged from about 5 hours 20 minutes to nearly 12 hours. If your baby is healthy, growing well, and getting somewhere in the range of 12 to 16 total hours of sleep per day, their pattern is likely fine, even if it doesn’t match what other parents describe.