A 5-month-old needs roughly 14 hours of total sleep per day, split between nighttime and naps. The healthy range is 12 to 16 hours in a 24-hour period, so there’s quite a bit of normal variation from one baby to the next.
Nighttime and Daytime Sleep Breakdown
At five months, the goal is 10 to 12 hours of nighttime sleep and 3 to 4 hours of daytime sleep. Most babies this age take three naps a day, with that 3 to 4 hours of daytime sleep divided across those naps. Some naps will be longer than others, and that’s fine as long as total daytime sleep lands in that range.
Night feedings are still common at this age. As babies grow, they gradually wake less often overnight, but most 5-month-olds still need at least one feeding during the night. A baby who sleeps a long stretch of 6 to 8 hours before waking to eat is doing well, even if it doesn’t feel like “sleeping through the night” to you.
Wake Windows Between Naps
The average wake window for a 5-month-old is 2 to 3 hours. That means your baby can comfortably stay awake for about that long before needing to sleep again. Pushing much past three hours often leads to overtiredness, which paradoxically makes it harder to fall asleep and stay asleep. The first wake window of the day is usually the shortest (closer to two hours), and the last one before bedtime tends to be the longest.
If your baby is fighting naps or taking only 20-minute catnaps, the wake window may be too short or too long. Adjusting by even 15 minutes in either direction can make a noticeable difference.
Why Sleep Patterns Shift Around This Age
Between three and six months, babies go through a significant change in how their brains handle sleep. They start spending more time in deep, quiet sleep and less time in the lighter, active sleep that dominated their newborn months. Their sleep cycles also grow longer, which is why many babies begin consolidating nighttime sleep into longer stretches around 4 to 6 months, especially as they gain weight.
This shift is sometimes called the “4-month sleep regression,” though it’s really a permanent reorganization of sleep architecture rather than a temporary setback. Once your baby’s sleep cycles mature, they briefly wake between cycles the way adults do. The difference is that they haven’t yet learned to fall back asleep on their own, so those between-cycle wake-ups can turn into full awakenings that need your help.
Teething and Disrupted Sleep
Many babies begin teething around this age, and it can throw a wrench into an otherwise solid sleep pattern. Teething typically disrupts sleep rather than increasing it, making it harder for babies to fall asleep and stay asleep for long stretches. Each tooth takes about a week to break through, and you can expect up to two weeks of sleep disruption per tooth.
The good news is that this is temporary. Once the tooth is through, sleep usually returns to baseline. If your baby’s sleep falls apart for a few days and you can’t figure out why, running a clean finger along their gums to feel for swelling or a hard ridge is worth trying.
Sleep Training Readiness at 5 Months
Five months is often considered an ideal window for sleep training if you’re interested in it. By this age, wake windows are settling into a predictable pattern, daytime feedings are spacing out to 3 to 4 hours apart, and your baby’s temperament is becoming clearer. Most babies are ready for gentle sleep training between 4 and 6 months, provided they show enough readiness signs.
Key signs your baby may be ready include: being at least 4 months old (adjusted for prematurity), having moved past the 4-month sleep regression, following a somewhat predictable nap pattern, and weighing enough to drop at least one night feed. Your own readiness matters too. Sleep training works best when you feel confident in your approach rather than pressured into it.
Hold off if your baby is actively teething, sick, recovering from vaccines, or adjusting to a major change like a new caregiver or room transition. These stressors layer on top of sleep learning and make the process harder for everyone.
Safe Sleep Setup
At five months, safe sleep basics still apply. Your baby should sleep on their back on a firm, flat mattress in a crib, bassinet, or portable play yard with only a fitted sheet. No blankets, pillows, stuffed animals, or bumper pads. The sleep space should ideally be in your room for at least the first six months.
Avoid letting your baby sleep in a swing, car seat (when not in the car), or on a couch or armchair. Overheating is also a risk factor, so dress your baby in layers appropriate for the room temperature and skip hats indoors. If your baby’s chest feels hot or they’re sweating, they’re likely overdressed. Offering a pacifier at nap time and bedtime can also provide a protective benefit.
What “Normal” Actually Looks Like
The 12-to-16-hour range exists because babies vary. Some 5-month-olds genuinely thrive on 12.5 hours of total sleep while others need closer to 15. The numbers above are targets, not rigid requirements. What matters more than hitting an exact number is whether your baby seems well-rested: alert and engaged during wake windows, not chronically fussy, and able to fall asleep without an extended struggle.
If your baby consistently sleeps well outside the typical range and is growing, feeding, and developing normally, that’s likely just their pattern. Babies who seem perpetually overtired despite adequate sleep opportunity, or who snore loudly and seem to struggle with breathing during sleep, are worth bringing up with your pediatrician.