An 8-month-old typically needs about 10 to 12 hours of nighttime sleep, with total sleep across the full day falling in the 12 to 16 hour range (including naps). That nighttime stretch may not be fully uninterrupted yet, and that’s normal. What matters most is that your baby is consistently getting enough total sleep and settling into a predictable rhythm.
Total Sleep Needs at 8 Months
The American Academy of Pediatrics recommends that babies aged 4 to 12 months get 12 to 16 hours of sleep per 24-hour period, including naps. At 8 months, most of that sleep shifts toward nighttime, with daytime naps making up the remainder. A typical breakdown looks like 10 to 12 hours overnight and about 3 hours of napping during the day.
Every baby is different, so the exact split varies. Some 8-month-olds sleep 11 hours at night with shorter naps; others sleep closer to 10 hours at night and nap a bit longer. The total is what counts. If your baby is alert, feeding well, and hitting milestones during the day, their sleep total is likely in a healthy range even if it doesn’t match a schedule you found online.
Daytime Naps and How They Affect Nighttime
Most 8-month-olds take two to three naps per day, totaling roughly 3 hours. This is a transitional period: many babies are in the process of dropping from three naps to two, so it’s common to have some two-nap days and some three-nap days in the same week. The first two naps should ideally be at least 60 minutes each. If your baby still takes a third nap, it’s usually a shorter catnap of 30 to 45 minutes.
Too much daytime sleep can push bedtime later or cause more overnight waking. Too little can lead to an overtired baby who, counterintuitively, sleeps worse at night. The sweet spot is roughly 3 hours total, spaced across the day with wake windows of about 2 hours 45 minutes to 3 hours 30 minutes between sleep periods. That last wake window before bedtime is usually the longest one.
Why Sleep Gets Disrupted Around 8 Months
If your baby was sleeping well and suddenly isn’t, you’re likely dealing with the 8-month sleep regression. This is driven by a surge of physical and emotional development happening all at once. Many babies at this age are learning to crawl, pull to stand, and sit up independently. These new physical abilities can cause genuine restlessness in the crib as your baby practices movements even while half-asleep.
Separation anxiety also tends to start or intensify around 8 months. Your baby now understands that you still exist when you leave the room, which is a cognitive leap but not exactly helpful at bedtime. If your baby cries or becomes agitated the moment you step away from the crib, this is the likely reason. Teething can compound everything, adding discomfort on top of developmental restlessness.
Sleep regressions typically last two to six weeks. They’re frustrating, but they’re a sign of healthy brain development rather than a problem with your baby’s sleep habits.
Night Feedings at This Age
Whether your baby still needs to eat overnight depends partly on how they’re fed. Formula-fed babies over 6 months are unlikely to wake from genuine hunger, since formula digests more slowly and most are getting sufficient calories during the day by this age. For breastfed babies, the guidance is different: night weaning before 12 months can reduce milk supply, so many experts suggest waiting until after the first birthday to phase out overnight nursing sessions for breastfed infants.
That said, there’s a difference between a baby who wakes hungry and a baby who wakes and uses feeding to fall back asleep. If your 8-month-old is eating well during the day, including solid foods, overnight feeds may be more of a comfort habit than a nutritional necessity. Gradually reducing the length or volume of night feeds is one way to test whether your baby truly needs them.
Sleep Training at 8 Months
Eight months is a perfectly appropriate age for sleep training if your family needs it. Most pediatric guidelines consider babies ready starting around 4 months and 14 pounds, so an 8-month-old is well within that window. The goal of sleep training is teaching your baby to fall asleep independently, which usually means they can also resettle themselves during normal overnight wakings without your help.
There are several approaches. Gradual methods, like the chair technique, involve sitting near the crib while your baby falls asleep and slowly moving further away over the course of several nights. Other methods involve checking in at timed intervals, giving brief reassurance without picking the baby up. Some families opt for letting their baby self-settle with no intervention. Research from UChicago Medicine confirms that when done with the right preparation and in a safe environment, sleep training is both safe and effective. The best method is simply the one you and any other caregivers can follow consistently.
The 8-month sleep regression can complicate sleep training. If your baby is in the thick of learning a new physical skill or experiencing peak separation anxiety, you may want to wait a couple of weeks for things to settle before starting a new approach.
Setting Up a Safe Sleep Space
At 8 months, your baby’s crib should still contain nothing but a firm, flat mattress covered with a fitted sheet. No pillows, blankets, stuffed animals, crib bumpers, or weighted sleep products. Research links soft bedding and crib bumpers to serious injuries and deaths from suffocation, entrapment, and strangulation. A bare crib looks sparse, but it is the safest option.
If you’re worried about your baby being cold, a wearable blanket or sleep sack is a safe alternative to loose blankets. The mattress should be firm enough that it springs back to shape quickly when pressed. Memory foam, pillow-top mattresses, and any soft sleeping surface are not safe for babies this age.