Most 8-month-olds are physically capable of sleeping through the night, but a perfect storm of developmental changes often gets in the way. Crawling, pulling up, teething, and a new awareness that you exist even when you leave the room can all conspire to fragment sleep right around this age. The good news: with the right schedule, environment, and consistent approach, most families see significant improvement within one to two weeks.
Why 8-Month-Olds Start Waking Again
Even babies who were sleeping well at six months can hit a rough patch around eight months. This isn’t random. By this age, most infants can roll over, sit independently, and crawl or are close to it. These new physical abilities create a kind of restlessness at night. Your baby’s brain is practicing motor skills even during sleep, and they may wake themselves up by rolling, scooting, or pulling to stand in the crib without knowing how to get back down.
On top of that, separation anxiety typically intensifies around 8 to 9 months. Your baby now understands object permanence: they know you still exist when you walk out of the room, and they don’t like it. If your baby cries or becomes visibly upset the moment you step away from the crib, this is likely the reason. Teething pain adds another layer, since many babies are cutting teeth at this stage. Any one of these disruptions can break up nighttime sleep. Together, they’re the classic 8-month sleep regression.
Get the Daytime Schedule Right First
Night sleep depends heavily on what happens during the day. At 8 months, most babies do best on two naps totaling roughly two to three hours combined. The average wake window (the time your baby can handle being awake between sleeps) is about two to three hours. If your baby is still taking three short naps, the third nap may be pushing bedtime too late and making it harder to fall asleep at night.
A typical rhythm looks something like this: wake up around 6:30 or 7 a.m., first nap mid-morning, second nap early afternoon, and bedtime between 7 and 8 p.m. The longest wake window of the day should be the last one, before bed. If bedtime is a battle, try shifting it 15 to 30 minutes earlier. Overtired babies actually have a harder time falling and staying asleep because their stress hormones spike when they’ve been awake too long.
Make Sure Hunger Isn’t the Problem
An 8-month-old needs roughly 750 to 900 calories a day, with about 400 to 500 of those coming from breast milk or formula (around 24 ounces total). The rest comes from solid foods. If your baby isn’t eating enough during the day, they’re more likely to wake up hungry at night.
Solids genuinely do make a difference for sleep. A large study of over 1,300 infants from King’s College London found that babies who were well-established on solid foods slept about 16 minutes longer per night and woke less frequently, dropping from just over two wake-ups per night to about 1.7. That may sound small, but it adds up to nearly two extra hours of sleep per week, and parents in the study reported fewer sleep problems overall.
If your baby is still waking once to feed at night and genuinely eating (not just comfort nursing for a minute or two), that feed may still be needed. But if they’re eating well during the day and only snacking at the breast or bottle overnight, you can gradually reduce that feeding. Offer a full feed right before bed, and if they wake, try waiting a few minutes before going in. Many babies will resettle on their own once the habit fades.
Build a Short, Predictable Bedtime Routine
A consistent bedtime routine signals to your baby’s brain that sleep is coming. Keep it to about 15 to 20 minutes and do the same steps in the same order every night: bath, pajamas, feeding, a short book or song, then into the crib. The routine should end in the room where your baby sleeps.
Because separation anxiety peaks around this age, how you say goodnight matters. Keep the goodbye short and warm. A quick phrase, a kiss, and then leave. Lingering at the crib or repeatedly coming back to soothe actually extends the anxiety rather than easing it. If your baby has a small lovey or comfort object (check age-appropriate safety guidelines for your baby’s stage), offering it consistently at bedtime can help bridge the gap when you leave the room.
Set Up the Right Sleep Environment
Your baby should sleep on their back in their own crib, bassinet, or portable play yard with a firm, flat mattress and a fitted sheet. Nothing else belongs in the sleep space: no loose blankets, pillows, stuffed animals, or bumper pads. These guidelines from the American Academy of Pediatrics apply through the entire first year.
Room temperature makes a noticeable difference. Studies suggest a range of 68 to 72 degrees Fahrenheit is comfortable for most babies. Dress your baby in a sleep sack rather than loose blankets to keep them warm without the safety risk. A dark room and white noise can also help, especially if your baby is sensitive to sounds or early morning light. Darkness supports the natural release of the sleep hormone that helps your baby stay asleep longer.
Teach Your Baby to Fall Asleep Independently
This is the single most important factor. A baby who falls asleep being rocked, nursed, or held will expect those same conditions when they wake between sleep cycles at night. Since all humans briefly surface between cycles (every 60 to 90 minutes for babies), a child who can’t self-settle will cry for help every time. Teaching your baby to fall asleep in the crib, awake, is what “sleeping through the night” actually requires.
There are several well-established approaches, and no single method is right for every family.
- Graduated check-ins (Ferber method): Place your baby in the crib drowsy but awake, say goodnight, and leave. Return at increasing intervals (three minutes, then five, then ten) to briefly offer a soothing word, but don’t pick them up or stay long. The intervals stretch out over several nights until your baby learns to settle without you in the room.
- Full extinction (cry it out): After your bedtime routine, say goodnight and don’t return until morning or the next scheduled feed. Make sure your baby is fed, dry, and safe. This method is harder on parents emotionally, but research consistently shows it works the fastest, often within three to four nights.
- Chair method: Put your baby down drowsy and sit in a chair next to the crib until they fall asleep. Every few nights, move the chair farther from the crib until you’re outside the room. This is slower but lets you stay present during the transition.
- Pick up, put down: When your baby cries, go in, pick them up just long enough for them to calm down, then place them back in the crib and leave. Repeat as needed. This provides the most physical comfort but can be the slowest approach and sometimes overstimulates babies who get frustrated by the repeated cycle.
Whichever method you choose, consistency is everything. Responding differently each night (sometimes rocking to sleep, sometimes letting them fuss, sometimes bringing them to your bed) teaches your baby that crying long enough will eventually change the outcome. Pick a plan both caregivers agree on and stick with it for at least a full week before judging results.
Handle Night Wakings With a Plan
When your baby wakes at night during sleep training, respond the same way you did at bedtime. If you’re using check-ins at bedtime, use check-ins for middle-of-the-night wakings too. If you’re still keeping one overnight feed, decide in advance what time that feed will happen and treat any waking before that time as a training opportunity rather than a feeding cue.
For separation anxiety specifically, resist the urge to make nighttime interactions engaging. Keep the room dark, your voice quiet, and the interaction brief. You want your baby to learn that nighttime is boring and that you always come back, both at the same time.
What to Expect in the First Week
The first two or three nights are usually the hardest. Crying may last 30 to 60 minutes on the first night, sometimes longer. By night three or four, most babies reduce their protest significantly. By the end of the first week, many are falling asleep within 10 to 15 minutes with little or no crying.
Temporary setbacks are normal. Illness, travel, teething flares, and new developmental milestones can all cause brief regressions. When that happens, return to your routine and your method as soon as possible. Babies who’ve already learned the skill of self-settling typically bounce back within a night or two once the disruption passes.