An 8-month-old typically needs about 10 to 12 hours of nighttime sleep, with a total of 12 to 16 hours in a 24-hour period including naps. Most babies this age are capable of sleeping in long stretches at night, though brief wakings are still normal and don’t necessarily mean something is wrong.
Total Sleep Needs at 8 Months
The American Academy of Sleep Medicine and the National Sleep Foundation both recommend 12 to 16 hours of total sleep per day for infants aged 4 to 12 months. At 8 months, most of that sleep shifts toward nighttime. A typical breakdown looks like 10 to 12 hours overnight plus 2 to 3 hours of daytime naps split across two nap sessions. Some babies land on the higher end, some on the lower end, and both are fine as long as your baby seems well-rested and is developing normally.
By 8 months, most babies have dropped down to two naps a day, one in the morning and one in the afternoon. Wake windows between sleep periods generally run 2.5 to 3.5 hours. If your baby is fighting a nap or taking very short naps, the wake window before that nap may need to be slightly longer. The last wake window of the day (between the afternoon nap and bedtime) is usually the longest one.
Why 8-Month-Olds Can Sleep Longer Stretches
A baby’s internal clock is actively maturing between 6 and 18 months. The hormone that regulates sleep-wake cycles, melatonin, begins following a rhythmic pattern in early infancy, but the full circadian system isn’t locked in until closer to 18 months to 2 years. At 8 months, your baby is well into this process. That’s why sleep patterns at this age start looking more adult-like, with a long consolidated block at night and distinct daytime naps rather than the scattered sleep of a newborn.
Before 7 months, babies commonly nap three or more times a day. From about 7 to 8 months onward, most settle into a two-nap rhythm, which concentrates more of their total sleep into the nighttime hours.
Night Wakings and Self-Soothing
Even healthy 8-month-olds wake briefly during the night. Every human cycles through lighter and deeper sleep phases, and at the end of each cycle, there’s a moment of partial waking. The difference between a baby who “sleeps through the night” and one who doesn’t is often whether they can resettle on their own.
Research tracking infants from birth to 12 months found that by 9 months, babies self-soothe (fall back asleep without a parent’s help) about 48% of the time they wake. That number climbs steadily toward the first birthday. One of the strongest predictors of self-soothing at 12 months was how quickly parents responded to wakings at 3 months. Babies whose parents paused a bit before intervening were more likely to develop the ability to settle themselves back to sleep. This doesn’t mean ignoring a crying baby, but it does suggest that a brief pause before rushing in can give your baby a chance to practice resettling.
Do 8-Month-Olds Still Need Night Feeds?
Many 8-month-olds no longer need calories overnight, especially if they’re eating solid foods well during the day. A large randomized trial of over 1,300 infants found that those who started solids earlier slept significantly longer at night and woke less often. The differences peaked around 6 months, with the early-solids group sleeping about 17 minutes longer per night and waking fewer times. By 8 months, a baby who’s eating a reasonable amount of solids and milk during daytime hours is generally getting enough nutrition to sustain a full night of sleep.
That said, some babies genuinely are hungry at night, particularly those growing rapidly. The same study found that infants with the fastest weight gain were the most likely to wake at night, consistent with higher caloric needs. If your 8-month-old is waking and seems truly hungry (eating eagerly rather than comfort-nursing briefly), a night feed may still be appropriate. But waking alone isn’t proof of hunger. Babies wake for many reasons, and feeding every time can create an association where your baby needs to eat to fall back asleep.
The 8-Month Sleep Regression
If your baby was sleeping well and suddenly isn’t, you’re likely dealing with a sleep regression. At 8 months, several developmental changes converge at once. Your baby may be learning to crawl, pull up to standing, or sit independently. These new physical skills can cause restlessness at night as the brain processes and practices them. Teething is also common at this age, and sore gums can wake a baby who would otherwise sleep through.
The emotional side matters too. Around 8 months, separation anxiety intensifies. Your baby now understands that you exist even when you leave the room, and that realization can make nighttime separations harder. Greater awareness of their environment also means they’re more easily overstimulated during the day, which can spill over into fragmented sleep.
Sleep regressions at this age are normally short-lived, typically lasting two to four weeks. The most helpful thing you can do is stay consistent with your existing bedtime routine rather than introducing new habits (like co-sleeping or rocking to sleep) that you’ll need to undo later. Give your baby plenty of time to practice new motor skills during the day so they’re less compelled to practice at 2 a.m.
What a Typical Night Looks Like
A realistic schedule for an 8-month-old often has bedtime falling between 6:30 and 8:00 p.m., with a wake-up between 6:00 and 7:00 a.m. That 10-to-12-hour overnight window doesn’t have to be unbroken. One or two brief wakings where your baby resettles quickly (with or without minimal help) is still considered sleeping through the night in pediatric terms. “Sleeping through the night” in clinical research is defined as a stretch of just 6 to 8 consecutive hours, which is less than most parents imagine.
If your baby is consistently getting less than 10 hours at night, consider whether daytime naps are running too long or too late, cutting into nighttime sleep pressure. A second nap that ends after 4:00 p.m. can push bedtime later and shorten the overnight stretch. Keeping the last nap from running past mid-afternoon helps protect a reasonable bedtime and a longer night.