An 8-month-old should sleep 12 to 16 hours in a 24-hour period, including a stretch of 9 to 12 hours at night and about 2.5 to 3.5 hours of daytime naps. This range, endorsed by the American Academy of Pediatrics for all infants 4 to 12 months old, accounts for natural variation between babies. Where your child falls within that window depends on their temperament, activity level, and how well they nap during the day.
Nighttime Sleep at 8 Months
Most 8-month-olds are capable of sleeping 9 to 12 hours overnight, though not all of them will do so without waking. Many babies this age still wake once or twice, especially if they’re breastfed. Formula-fed babies over 6 months are unlikely to wake from genuine hunger, since formula digests more slowly than breast milk. Breastfed babies, on the other hand, may still benefit nutritionally from a nighttime feed, and weaning those feeds before 12 months can reduce milk supply.
If nighttime feeds aren’t bothering you, there’s no pressure to drop them. But if your baby is waking frequently and not actually eating much, the wake-ups may be habit-driven rather than hunger-driven.
How Naps Should Look
By 8 months, most babies have settled into a two-nap schedule. The total daytime sleep goal is 2.5 to 3.5 hours split across those two naps, with neither nap running longer than about 2 hours. Letting one nap stretch too long can push bedtime later or make the second nap harder to achieve.
Some babies are still clinging to a third catnap at this age. If your baby recently dropped from three naps to two, you may need to offer an earlier bedtime temporarily to compensate for the lost sleep and prevent overtiredness during the transition.
Wake Windows and Daily Timing
Wake windows, the stretches of awake time between sleep periods, are the most useful tool for building a predictable schedule. At 8 months, most babies need 2.25 to 3.5 hours of awake time before they’re ready to sleep again. That window tends to be shorter in the morning and longer as the day goes on. The last stretch before bedtime is usually the longest, typically 2.75 to 3.5 hours.
A typical day might look something like this:
- 6:45–7:00 AM: Wake and first feed
- 9:30–11:15 AM: First nap (about 2.5 to 3 hours after waking)
- 2:15–4:00 PM: Second nap (about 3 hours after the first nap ends)
- 7:00–7:30 PM: Bedtime (about 3 to 3.5 hours after the second nap ends)
This is a framework, not a rigid prescription. Your baby’s hunger cues, mood, and natural wake time will shift the specifics. The bedtime sweet spot for most 8-month-olds falls between 7:00 and 8:00 PM.
The 8-Month Sleep Regression
If your baby was sleeping well and suddenly isn’t, you’re likely in the middle of a sleep regression. Around 8 months, several developmental changes collide at once. Babies are learning to crawl, pull to standing, and sit up, and they sometimes practice these new skills in the crib instead of sleeping. Teething often ramps up around this age, causing fussiness and nighttime wake-ups. On the emotional side, separation anxiety typically emerges or intensifies, making it harder for babies to settle when a parent leaves the room.
Greater environmental awareness also plays a role. Your baby is more tuned in to sounds, light, and activity around them, which can lead to overstimulation and difficulty winding down. The good news is that sleep regressions at this age are normally short-lived, usually resolving within a few weeks as your baby adjusts to their new abilities. Staying consistent with your existing sleep routines is the most effective way to get through it.
Signs Your Baby Isn’t Sleeping Enough
Total sleep that consistently falls below 12 hours in a 24-hour period is worth paying attention to. Signs of insufficient sleep in an 8-month-old include increased fussiness or clinginess during wake windows, difficulty settling for naps, waking very early in the morning (before 6:00 AM), and falling asleep almost instantly when put down, which can signal overtiredness rather than healthy fatigue. A well-rested baby typically takes 5 to 20 minutes to fall asleep.
Overtiredness creates a frustrating cycle: the more tired a baby gets, the harder it becomes for them to fall asleep and stay asleep. If you notice this pattern, try shortening wake windows by 15 to 30 minutes and moving bedtime earlier.
Crib Safety at This Age
Eight-month-olds are more mobile than they were a few months ago, which changes what’s safe in the crib. The crib should have a firm, tight-fitting mattress with only a fitted bottom sheet. No pillows, blankets, comforters, bumper pads, or stuffed animals. If you want extra warmth, a wearable sleep sack is safer than a loose blanket. Your baby should still be placed on their back to start each sleep period, even though they can likely roll on their own at this point. Once a baby can roll both ways independently, you don’t need to reposition them if they shift during the night.