An 8-month-old needs 12 to 16 hours of total sleep per day. That typically breaks down to 11 to 12 hours at night and 2 to 3 hours of daytime naps. This range comes from pediatric guidelines for infants aged 4 to 12 months, and most 8-month-olds land comfortably within it.
Nighttime Sleep at 8 Months
Most 8-month-olds can sleep a stretch of 9 to 12 hours at night, though not all of that will necessarily be uninterrupted. Some babies are sleeping through consistently by this age, while others still wake once or twice. Formula-fed babies over 6 months are generally not waking from hunger, since formula digests slowly enough to sustain them overnight. Breastfed babies may still benefit from one nighttime feed, and night weaning for breastfed infants is typically recommended after 12 months to protect milk supply.
How Naps Should Look
At 8 months, most babies take 2 to 3 naps per day, totaling about 2 to 3 hours of daytime sleep. This is a transitional period. Your baby may have some days with three naps and other days with just two as they gradually drop that third nap.
The first two naps of the day should ideally last at least 60 minutes each. If your baby is still on a three-nap schedule, that last nap is usually a shorter catnap of 30 to 45 minutes. As babies settle into a two-nap routine, those two naps tend to lengthen slightly to make up the difference.
Wake Windows Between Naps
Wake windows for an 8-month-old range from 2.5 to 3.5 hours. A baby who just turned 8 months will typically need the shorter end of that range, while one approaching 9 months can handle longer stretches. These windows also tend to get longer as the day goes on, so your baby might be ready for the first nap after 2.5 hours but stay awake for 3.5 hours before bedtime.
Getting wake windows right matters because an overtired baby actually has a harder time falling asleep and staying asleep. If your baby is becoming clumsy, clingy, fussy with food, or suddenly hyperactive, those are signs they’ve been awake too long. Crying, grizzling, and losing interest in toys are other reliable cues that it’s time to start your nap routine.
Why Sleep Can Fall Apart at 8 Months
Even babies who were previously great sleepers can hit a rough patch around this age. The so-called 8-month sleep regression is driven by a burst of developmental changes happening all at once. Many 8-month-olds are learning to crawl, sit up independently, and pull themselves to standing. These new physical skills can make them restless in the crib, sometimes practicing movements when they should be sleeping.
Teething is another common disruptor. Many babies are cutting teeth around this age, which can cause fussiness and night wakings that have nothing to do with hunger or sleep habits.
Separation anxiety also tends to intensify at 8 months. Your baby is becoming more aware of their surroundings and more attached to you specifically. If they cry or become upset when you move away from the crib, this is a normal emotional milestone, not a sleep training failure. Most babies move through this phase within a few weeks, though it can feel longer in the moment.
Building a Safe Sleep Setup
At 8 months, your baby is rolling, sitting, and possibly pulling up, which makes the sleep environment more important than ever. The crib should have a firm, flat mattress with a fitted sheet and nothing else. No pillows, blankets, stuffed animals, bumper pads, or loose bedding of any kind. These items increase the risk of suffocation, even for older babies who seem more mobile and capable.
If you’re worried about your baby getting cold, dress them in layers or use a wearable blanket (sometimes called a sleep sack). Weighted blankets, weighted swaddles, and weighted sleepers are not safe for infants and should be avoided.
What a Typical Day Looks Like
Putting all of this together, a realistic schedule for an 8-month-old on two naps might look something like this:
- Morning wake-up: 6:00 to 7:00 a.m.
- First nap: about 2.5 to 3 hours after waking, lasting 60+ minutes
- Second nap: about 3 hours after the first nap ends, lasting 60+ minutes
- Bedtime: about 3 to 3.5 hours after the second nap ends, typically between 7:00 and 8:00 p.m.
Babies still on three naps will have a similar structure but with a short catnap in the late afternoon and slightly shorter wake windows between each sleep period. There’s no single correct schedule. The goal is to land in that 12 to 16 hour total range while keeping your baby from getting overtired between naps. If your baby is waking happy, falling asleep without a major struggle, and generally in good spirits during the day, their sleep is likely on track.