A 5-month-old typically needs 12 to 16 hours of total sleep per 24-hour period, split between nighttime sleep and daytime naps. Most babies this age sleep 11 to 12 hours at night (with wake-ups for feeding) and get another 2.5 to 3.5 hours of daytime sleep spread across three or four naps.
Nighttime Sleep at 5 Months
By 5 months, most babies have consolidated the bulk of their sleep into the nighttime stretch. You can expect roughly 11 to 12 hours of overnight sleep, though that doesn’t mean 11 to 12 hours of uninterrupted rest. Many 5-month-olds still wake once or twice to feed, and that’s completely normal. Babies who are formula-fed may be ready to phase out night feeds closer to 6 months, while breastfed babies often continue nighttime feeds well into their first year.
Most babies begin sleeping longer stretches of 6 to 8 hours without waking around 3 months of age, so by 5 months your baby may already be capable of one longer block. If your baby was sleeping longer stretches and has suddenly started waking more, a developmental shift (more on that below) is the likely explanation.
How Many Naps and How Long
Three to four naps per day is the typical range for a 5-month-old. The total daytime sleep usually adds up to 2.5 to 3.5 hours. Not every nap will be the same length. At this age, babies often struggle to link sleep cycles during the day, so 30- to 45-minute naps are common and not necessarily a sign of a problem.
That said, the first two naps of the day tend to start lengthening around 5 months, stretching to 1 to 1.5 hours each. A third or fourth nap later in the afternoon is often shorter, sometimes just a catnap. If your baby takes especially long naps, capping each one at 1.5 to 2 hours helps protect nighttime sleep and keeps the rest of the day’s schedule on track.
Wake Windows Between Naps
A wake window is the stretch of time your baby stays awake between one sleep period and the next, including feeding and play. For a 5-month-old, that window is typically 2 to 3 hours. Earlier in the day, your baby may only tolerate closer to 2 hours of awake time. By the afternoon, they can often handle closer to 3 hours before the last nap or bedtime.
Pushing past the wake window tends to backfire. An overtired baby produces more of the stress hormone cortisol, which paradoxically makes it harder to fall asleep and stay asleep. Watching your baby’s cues (covered below) is more reliable than watching the clock, since every baby’s tolerance varies slightly.
Signs Your Baby Is Ready for Sleep
Catching sleepy cues early makes a real difference in how easily your baby falls asleep. The earliest signs are subtle: yawning, droopy eyelids, staring into the distance, and furrowed brows. You might also notice your baby rubbing their eyes, pulling on their ears, or sucking their fingers.
If you miss those early signals, your baby moves into overtired territory. That looks like fussiness, clinginess, turning away from the bottle or breast, and a kind of prolonged whining that doesn’t quite become a full cry. Some overtired babies even start sweating, because the stress hormone cortisol rises with fatigue. If you’re consistently seeing these late-stage cues, try starting your nap routine about 15 minutes earlier.
The 4-to-5 Month Sleep Regression
If your baby’s sleep suddenly falls apart around this age, you’re likely dealing with the well-known 4-month sleep regression, which can extend into month five. This disruption happens because your baby’s sleep architecture is maturing. Their brain is reorganizing how it cycles through light and deep sleep stages, and that transition causes more frequent wake-ups.
Several things pile on at once around this age: teething pain, growth spurts that increase hunger, and the excitement of learning to roll over. Signs of a regression include more frequent night waking, trouble falling asleep at bedtime, sudden resistance to naps, and increased crankiness during the day. A regression typically lasts two to four weeks. Keeping nap timing and bedtime routines consistent helps your baby adjust faster.
A Sample Daily Schedule
Every baby is different, but a common rhythm for a 5-month-old looks something like this:
- Morning wake-up: 6:30 to 7:00 a.m.
- First nap: about 2 hours after waking, lasting 1 to 1.5 hours
- Second nap: about 2 to 2.5 hours after the first nap ends, lasting 1 to 1.5 hours
- Third nap: a shorter catnap of 30 to 45 minutes in the late afternoon
- Bedtime: 6:30 to 8:00 p.m., about 2.5 to 3 hours after the last nap ends
Some babies still take a brief fourth nap if their earlier naps were short. The goal is to keep total daytime sleep in the 2.5 to 3.5 hour range and avoid letting the last nap run too late, which can push bedtime and disrupt the overnight stretch.
Safe Sleep Setup
For every sleep period, naps and nighttime, your baby should be placed on their back on a firm, flat mattress in a safety-approved crib or bassinet. Keep the sleep surface bare: no blankets, pillows, bumper pads, or stuffed animals. The CDC recommends keeping your baby’s sleep area in your bedroom for at least the first 6 months.
Overheating is another risk factor to watch for. If your baby’s chest feels hot to the touch or they’re sweating during sleep, they may have too many layers on. A sleep sack is a safe alternative to loose blankets for keeping your baby warm without covering their face.