A 5-month-old should sleep 12 to 16 hours in a 24-hour period, including naps. That’s the range endorsed by the American Academy of Sleep Medicine, and it applies to all infants from 4 through 12 months. Most of that sleep happens at night, with the rest spread across daytime naps. Where your baby falls within that range depends on their individual needs, but consistently landing below 12 hours is worth flagging with your pediatrician.
Nighttime Sleep vs. Daytime Naps
At 5 months, babies are consolidating more of their sleep into nighttime stretches. Most babies this age are capable of sleeping 6 to 8 continuous hours at night, though plenty still wake for feedings. The total nighttime portion typically runs 10 to 12 hours (with interruptions), while daytime naps make up the remaining 2 to 4 hours.
Three naps a day is the typical pattern at this age. You might see a longer morning nap, a longer midday nap, and a shorter late-afternoon catnap. That third nap often feels like it’s barely worth the effort, but it bridges the gap to bedtime and prevents your baby from becoming overtired in the evening.
Wake Windows at 5 Months
A 5-month-old can comfortably stay awake for about 2 to 3 hours between sleep periods. These wake windows tend to be shorter in the morning and gradually stretch longer as the day goes on. So the first wake window after your baby gets up might be closer to 2 hours, while the one before bedtime might push toward 3.
Keeping an eye on wake windows is one of the most practical tools for getting nap timing right. If you wait too long, your baby crosses from tired into overtired, and overtired babies are paradoxically harder to put down. Their bodies release stress hormones like cortisol and adrenaline, which amp them up instead of calming them down. The result is a baby who seems wired, fights sleep, and then sleeps poorly once they finally drift off.
Recognizing Sleepy vs. Overtired
Catching your baby’s early sleep cues makes everything easier. A baby who’s ready for sleep will yawn, get droopy eyelids, rub their eyes, or pull on their ears. You might notice them staring into the distance, turning away from toys or lights, or sucking on their fingers. Some babies furrow their brows or start to cling more than usual. A low, drawn-out whine (sometimes called “grizzling”) that never quite becomes a cry is another classic signal.
Overtired looks different. The crying is louder and more frantic. It can seem to come out of nowhere. One minute everything is fine, and the next your baby is inconsolable. Some overtired babies even sweat more than usual because elevated cortisol raises body temperature. If you’re regularly seeing these signs, your wake windows may be too long or naps too short.
Night Feedings at 5 Months
Many 5-month-olds still need one or two feedings overnight, and that’s completely normal. Whether you’re breastfeeding or formula feeding doesn’t significantly change the picture. Research has found no meaningful difference in night wakings or night feedings between breastfed and formula-fed babies at this age. The idea that switching to formula will help your baby sleep through the night is a persistent myth that the data doesn’t support.
Some babies naturally drop night feeds around this age on their own, while others hold onto them for several more months. Both timelines are normal. If your baby wakes, feeds efficiently, and goes right back to sleep, that’s a feeding they likely still need.
Why Sleep May Suddenly Get Worse
If your baby was sleeping reasonably well and suddenly isn’t, you’re probably dealing with a sleep regression. The most well-known one hits around 4 months, driven by a permanent shift in how babies cycle through sleep stages. At 5 months, you may still be in the tail end of that regression, or your baby may be experiencing disruptions from new developmental milestones.
Around this age, many babies start rolling, pushing up on their arms, or becoming more physically active during the day. These new skills are exciting, and babies often “practice” them in the crib instead of sleeping. Teething can also begin to play a role, as can growth spurts that temporarily increase hunger. Sleep regressions tied to milestones typically last 2 to 4 weeks and resolve on their own as your baby adjusts to their new abilities.
Setting Up a Safe Sleep Space
At 5 months, your baby’s crib should contain nothing but a firm, flat mattress covered with a fitted sheet. No blankets, no pillows, no stuffed animals, no crib bumpers. Research links all of these items to serious risks including suffocation and entrapment. Weighted blankets and weighted swaddles are also unsafe for infants.
This is also the age when you should remove any mobiles or hanging toys from above the crib. By 5 months, many babies are starting to push up or pull themselves toward objects, and dangling items become a strangulation hazard. A sleep sack (unweighted) is a safe alternative to blankets for keeping your baby warm.
One more thing worth noting: if your baby falls asleep in a car seat, stroller, or swing, move them to their crib as soon as you can. These devices aren’t designed for extended sleep, and the semi-upright position can compromise a baby’s airway. They’re fine for their intended use, but shouldn’t become a regular sleep spot.
Putting It All Together
A rough daily schedule for a 5-month-old might look like this: wake up around 7 a.m., take a morning nap about 2 hours later, stay awake for another 2 to 2.5 hours before a midday nap, fit in a short third nap in the late afternoon, and head to bed for the night between 7 and 8 p.m. The specifics will vary based on your baby’s natural rhythms, but the framework of three naps with 2- to 3-hour wake windows and a bedtime that prevents overtiredness works for most families.
If your baby is consistently sleeping less than 12 hours total or seems chronically overtired despite your best efforts with timing, it’s worth looking at their sleep environment, their daytime routine, and whether something like reflux or an ear infection might be interfering. But for most 5-month-olds, landing somewhere in that 12-to-16-hour range with a predictable rhythm of naps and nighttime sleep is exactly where they should be.