A 5-month-old needs 12 to 16 hours of total sleep per day, including naps. Most of that sleep happens at night, with the remainder spread across three daytime naps. The exact number varies from baby to baby, but this range gives you a reliable target to work with.
Nighttime Sleep at 5 Months
At 5 months, most babies sleep roughly 10 to 12 hours overnight, though few do it without waking. Breastfed babies typically still need 1 to 3 nighttime feedings, while formula-fed babies usually need 1 to 2. You’ll likely notice these feeds becoming less frequent compared to earlier months, as your baby’s sleep starts consolidating into longer stretches at night.
Some babies this age can sleep 6 or more hours in a row before their first waking. Others still wake every 2 to 3 hours. Both patterns fall within normal range, and a lot depends on whether your baby is still working through the changes that began around 4 months (more on that below).
How Many Naps and How Long
Three naps a day is the sweet spot for most 5-month-olds, totaling about 3 to 4 hours of daytime sleep combined. The distribution across those naps doesn’t need to be even. One day might look like a 2-hour nap, a 1-hour nap, and a 30-minute nap. The next day could be two 1.5-hour naps and a 45-minute catnap in the late afternoon.
That third nap of the day tends to be the shortest, often just 30 to 45 minutes. It serves more as a bridge to bedtime than a deep restorative sleep. Try to keep total daytime sleep under 4 hours and cap any single nap at 2 hours. Too much daytime sleep can cut into nighttime stretches.
Wake Windows Between Naps
A wake window is the stretch of time your baby can handle being awake between sleep periods. At 5 months, that window is roughly 2 to 3 hours. Some babies at the older end of this age range can push toward 3 hours comfortably, especially later in the day, while others still do best closer to 2 hours in the morning.
Wake windows tend to get slightly longer as the day goes on. The first one after morning wakeup is usually the shortest. If you notice your baby getting fussy, rubbing their eyes, or pulling at their ears around the 2-hour mark, that’s your signal. Pushing past the window often backfires: an overtired baby has a harder time falling asleep and staying asleep than one who’s put down at the right moment.
Signs Your Baby Is Ready for Sleep
Learning to read your baby’s tired cues is more useful than following a rigid schedule. The early signs are subtle: yawning, droopy eyelids, staring off into the distance, or furrowing their brows. You might also see them rubbing their eyes, pulling their ears, or sucking on their fingers.
If you miss those early cues, the next round is louder. Fussiness, clinginess, whining, and turning away from toys or food all signal that your baby has crossed from “ready for sleep” into “overtired.” Some overtired babies make a distinctive sound sometimes called “grizzling,” a drawn-out whine that doesn’t quite become a full cry. Overtired babies can also sweat more than usual, because the stress hormone cortisol rises with fatigue. The goal is to catch those quiet early signals and start the nap routine before the louder ones kick in.
The 4-Month Sleep Regression
If your 5-month-old suddenly started waking every 1 to 2 hours after previously sleeping long stretches, you’re likely dealing with the tail end of the 4-month sleep regression. This isn’t really a regression at all. It’s a permanent change in how your baby’s brain processes sleep.
Before this shift, babies fall into deep sleep almost immediately. Around 4 months, their sleep cycles mature to include lighter stages of sleep, similar to adults. Each cycle lasts about 45 to 60 minutes, and at the end of every cycle, your baby briefly surfaces toward wakefulness. If they haven’t learned to connect one cycle to the next on their own, they wake up fully and need help getting back to sleep. This is why parents often describe their baby suddenly waking “every hour” or “every 45 minutes.”
For many families, these frequent wakings persist into the fifth month. The underlying change in sleep architecture is permanent, but babies do gradually learn to transition between cycles more smoothly. Some parents find this resolves on its own over a few weeks; others choose to work on independent sleep skills around this age.
Why 5-Month-Olds Wake at Night
Beyond hunger and the sleep cycle changes described above, a few other things commonly disrupt sleep at this age. Developmental milestones can temporarily throw off even a good sleeper. Around 5 months, many babies are learning to roll, and some are starting to push up or pull themselves into new positions. Practicing these new skills in the crib, sometimes at 3 a.m., is completely normal and usually passes within a week or two.
Babies also spend more of their sleep time in lighter, active sleep (REM) compared to adults. During REM sleep, they may twitch, move their eyes, make sounds, or shift around. This doesn’t always mean they’re awake. Pausing for a moment before intervening gives your baby a chance to settle back into the next sleep cycle on their own.
What a Typical Day Looks Like
There’s no single “correct” schedule, but here’s a realistic framework for a 5-month-old sleeping about 14.5 hours total:
- 7:00 AM: Wake and feed
- 9:00 AM: First nap (1 to 1.5 hours)
- 12:00 PM: Second nap (1 to 1.5 hours)
- 3:30 PM: Third nap (30 to 45 minutes)
- 6:30 PM: Begin bedtime routine
- 7:00 PM: Asleep for the night
Your baby’s version of this will shift depending on when they wake in the morning, how long their naps run, and their individual wake window tolerance. The schedule is less important than the overall pattern: three naps with 2- to 3-hour awake stretches, a bedtime that falls roughly 12 hours before morning wakeup, and total sleep landing somewhere in that 12- to 16-hour range.
Safe Sleep Setup
At 5 months, your baby should sleep on their back, on a firm and flat mattress with only a fitted sheet. Keep the crib free of blankets, pillows, stuffed animals, and bumper pads. If you’ve been using a mobile or hanging toy over the crib, the American Academy of Pediatrics recommends removing it around 5 months, since babies at this age start pulling up and could reach it.
Avoid letting your baby sleep in swings, car seats (unless you’re actually driving), or on couches and armchairs. These positions increase the risk of the airway becoming restricted, especially as your baby gains the ability to shift and roll.