Most 4-month-olds can sleep 5 to 8 hours at night in their longest stretch, though many still wake once or twice for feeding. The total nighttime sleep for this age typically falls between 10 and 12 hours, with the rest of their daily sleep needs met through daytime naps. If your baby isn’t hitting those numbers yet, that’s common. Four months is a transitional period where sleep patterns are actively maturing.
What a Typical Night Looks Like
By 4 months, most babies can go 5 or more hours between feedings at night. Some stretch this to 6 or 8 hours, especially if they’re gaining weight well. The total sleep recommendation for babies 4 to 11 months old is 12 to 15 hours per 24-hour period, with 10 hours on the low end of acceptable and 18 on the high end. Since 4-month-olds typically take three or four naps during the day (ranging from 30 minutes to 2 hours each), the remaining sleep happens at night.
If your baby wakes once or twice to eat overnight, that’s normal. Waking more than twice a night to feed at this age, though, may signal a habit rather than a genuine hunger need. Babies at 4 months have larger stomachs than newborns and can take in more calories during daytime feedings, which helps them sustain longer stretches without food overnight.
What “Sleeping Through the Night” Actually Means
Pediatricians define “sleeping through the night” as a stretch of about 6 to 8 hours, not the 10 or 11 hours adults might imagine. Many babies reach this milestone around 3 months, but plenty of 4-month-olds haven’t gotten there yet. The American Academy of Pediatrics points out that a “good sleeper” at this age is a baby who wakes frequently but can settle back to sleep on their own. It’s not a baby who never wakes up at all.
This distinction matters because all babies cycle between lighter and deeper sleep stages throughout the night, and brief wakings between cycles are biologically normal. The skill that develops over these months is the ability to drift back to sleep without help. If your baby stirs, fusses for a minute, then settles, that counts as sleeping through the night even though they technically woke up.
The 4-Month Sleep Regression
Right around this age, many parents notice their baby’s sleep gets worse, not better. The 4-month sleep regression is a well-documented phase where babies who had been sleeping in longer stretches suddenly start waking more often and struggling to fall back asleep. This happens because your baby’s sleep architecture is maturing. They’re shifting from the simpler newborn sleep pattern (basically two stages) to the more complex adult-like pattern with multiple stages of light and deep sleep.
The regression typically lasts a few days to a few weeks. It can feel endless in the moment, but it’s a sign of normal brain development. Babies going through it may fight naps during the day too, which creates a cycle of overtiredness that makes nighttime sleep even harder. Keeping a consistent bedtime routine and a dark, quiet sleep environment helps most babies move through this phase faster.
How Daytime Naps Affect the Night
It sounds counterintuitive, but babies who nap well during the day tend to sleep better at night. An overtired 4-month-old produces more stress hormones, which makes it harder for them to fall asleep and stay asleep. At this age, expect three or four naps a day. Many babies are starting to transition from four naps down to three, which can temporarily throw off their schedule.
Nap length varies widely. Some babies are consistent 30-minute nappers, while others sleep for 2 hours at a stretch. Short naps are frustrating but developmentally normal at 4 months. What matters more for nighttime sleep is that your baby isn’t awake for too long between naps. Most 4-month-olds do best with about 1.5 to 2 hours of awake time between sleep periods. Pushing much beyond that often backfires at bedtime.
Safe Sleep at 4 Months
Four months is when many babies start showing signs of rolling over, and this changes the safety picture. If your baby is still swaddled, stop as soon as you see any attempts to roll, even partial ones. Swaddling a baby who can roll onto their stomach increases the risk of suffocation because their arms are trapped and can’t push them back over. A wearable sleep sack with free arms is a safe alternative that still provides the cozy feeling without restricting movement.
Place your baby on their back for every sleep, even naps. If they roll onto their stomach on their own during the night and can roll both ways, most pediatricians consider it safe to leave them. But always start them on their back. Keep the crib free of blankets, pillows, stuffed animals, and bumper pads. A firm, flat mattress with a fitted sheet is all that belongs in there.
When Longer Stretches Will Come
Between 4 and 6 months, most babies consolidate their nighttime sleep into longer blocks. By 6 months, many are capable of sleeping 8 to 10 hours at a stretch, particularly if they’re eating enough during the day and have learned to self-soothe when they wake between sleep cycles. Breastfed babies sometimes take a bit longer to drop night feedings than formula-fed babies because breast milk digests faster.
Every baby’s timeline is different. Some 4-month-olds are already sleeping 8-hour stretches. Others won’t get there for another couple of months. Both are within the range of normal. The factors that make the biggest difference are consistent sleep routines, an age-appropriate nap schedule, and giving your baby brief opportunities to resettle on their own before intervening when they wake at night.