Most 8-month-olds are physically capable of sleeping long stretches at night, but developmental changes at this age often push sleep backward just when parents expect it to improve. Crawling, pulling up, teething, and a new awareness that you exist even when you leave the room can all collide at once, turning a decent sleeper into one who wakes repeatedly. The good news: with the right daytime schedule, bedtime routine, and a consistent approach to nighttime wakings, most families see real improvement within one to two weeks.
Why 8-Month-Olds Start Waking Again
Around 8 months, babies hit a cluster of physical and cognitive milestones. Many can roll over, sit independently, and crawl. Their brains are processing a flood of new information during the day, and that mental activity spills into sleep. You may notice your baby pulling to stand in the crib at 2 a.m. or rolling onto all fours and getting stuck, simply because the motor urge is so strong.
Separation anxiety is the other big disruptor. At this age, babies begin to understand that you still exist when you walk out of the room, but they haven’t yet learned that you’ll always come back. The result: crying or fussiness the moment you step away from the crib. This is a normal developmental phase, not a sign that something is wrong. It typically intensifies around 8 months and then gradually eases over the following weeks.
Teething adds a third layer. Each new tooth takes roughly a week to break through, and sleep can be disrupted for up to two weeks per tooth. If your baby is drooling heavily, chewing on everything, or has swollen gums, teething pain may be compounding the other issues. That said, teething alone doesn’t cause fever, vomiting, or diarrhea. If you see those symptoms, something else is going on.
Get the Daytime Schedule Right First
An overtired baby actually sleeps worse at night, not better. At 8 months, most babies do best on two naps a day with wake windows (the time spent awake between sleep periods) of 2.5 to 3.5 hours. A typical rhythm looks like this:
- Morning wake: around 7:00 a.m.
- Nap 1: about 2.5 to 3 hours after waking (roughly 9:30 to 11:15 a.m.)
- Nap 2: about 3 hours after nap 1 ends (roughly 2:15 to 4:00 p.m.)
- Bedtime: about 3 to 3.5 hours after nap 2 ends (roughly 7:00 to 7:30 p.m.)
The exact clock times matter less than the spacing. If your baby’s second nap ends at 3:30, aim for bedtime around 6:30 to 7:00. Pushing bedtime later in hopes of a longer night stretch usually backfires. An overtired baby produces more stress hormones, making it harder to fall asleep and stay asleep.
Make Sure Daytime Calories Are Enough
By 8 months, formula-fed babies are unlikely to wake at night from genuine hunger, since formula digests slowly enough to sustain them. Breastfed babies may still benefit from one night feed, and reducing night feeds before 12 months can lower your milk supply. If you’re breastfeeding and your baby wakes once to eat, that’s normal and worth keeping for now.
What you can control is how much your baby eats during the day. Solid foods play a real role here. A large study of over 1,300 infants in England and Wales found that babies who were eating solids alongside breast milk slept about 15 to 17 minutes longer per night and woke less frequently, with nighttime wakings dropping from just over twice per night to about 1.7 times. That’s almost two extra hours of sleep per week. At 8 months, your baby should be eating solids at least twice a day in addition to regular breast milk or formula feeds. Offering a filling meal of solids in the late afternoon or early evening, plus a full milk feed close to bedtime, helps ensure your baby isn’t waking from hunger.
Build a Predictable Bedtime Routine
A short, consistent sequence of events before bed signals your baby’s brain that sleep is coming. This doesn’t need to be elaborate. A bath, a fresh diaper, pajamas, a book or quiet song, a final feeding, and then into the crib. The key is doing the same things in the same order every night. Keep the whole routine to about 20 to 30 minutes.
One important detail: try to put your baby down drowsy but still awake. Babies who fall asleep while being rocked or fed learn to associate that sensation with falling asleep. When they naturally wake between sleep cycles at 2 a.m. (which all humans do), they need that same rocking or feeding to get back to sleep. A baby who falls asleep independently in the crib can cycle back into sleep on their own.
Set Up the Room for Better Sleep
Keep the crib bare. No blankets, pillows, bumper pads, or stuffed animals. Your baby should sleep on a firm, flat mattress covered only by a fitted sheet, placed on their back. These aren’t just suggestions; they’re the current safe sleep guidelines from the American Academy of Pediatrics.
Darkness matters more than most parents realize. Even low levels of light suppress melatonin, the hormone that drives sleepiness. Use blackout curtains or shades, and if you need a nightlight for middle-of-the-night diaper changes, choose the dimmest warm-toned light you can find (around 2700K color temperature). The goal is just enough light to see what you’re doing, not enough to brighten the room. Keep the room comfortably cool. If your baby is sweating or their chest feels hot to the touch, they’re overdressed or the room is too warm.
Choosing a Sleep Training Approach
At 8 months, your baby is well within the age range where sleep training is appropriate. There’s no single “right” method. What matters most is picking an approach you can follow consistently for at least a week. Here are the main options, from least to most parent involvement:
Full extinction (cry it out): After your bedtime routine, you place your baby in the crib awake, say goodnight, and don’t return until morning or a scheduled feed. This is the fastest method for most families but the hardest emotionally. You’ll want to make sure your baby is fed, dry, and safe before starting.
Graduated checks (Ferber method): You leave the room, then return at increasing intervals to briefly reassure your baby, but you don’t pick them up. For example, you might check in after 3 minutes, then 5, then 10, then 15. Each night, you stretch the intervals longer. A brief, calm “You’re okay, goodnight” is enough. Lingering tends to escalate the crying rather than reduce it.
Chair method: You sit in a chair next to the crib while your baby falls asleep. Every few nights, you move the chair farther from the crib until you’re eventually outside the room. This gives your baby the comfort of your presence while gradually teaching them to fall asleep without being held.
Pick up, put down: When your baby cries, you pick them up and soothe them until they calm down, then place them back in the crib. You repeat this as many times as needed. This method involves the most hands-on comfort but can take longer because some babies get more stimulated by being picked up repeatedly.
Most families see significant improvement within 3 to 7 nights if they stay consistent. The biggest mistake is switching methods mid-course or giving in after 45 minutes of crying one night, because that teaches your baby that extended crying eventually works.
Handling Nighttime Wakings
When your baby wakes and cries in the middle of the night, keep your response brief and boring. A quiet pat on the back and a calm “goodnight” is ideal. Avoid turning on lights, picking your baby up for extended cuddles, or starting a conversation. All of those things are rewarding, and your baby will learn to wake up specifically to get them.
Separation anxiety can make this feel brutal. Your baby may cry harder the moment you leave. But consistency is what makes this phase pass quickly. Babies who receive a predictable, low-key response to nighttime waking adjust faster than those who get an unpredictable mix of reactions. If one night you let your baby cry and the next night you bring them into your bed, the inconsistency actually increases anxiety rather than soothing it.
For teething pain specifically, you can offer a chilled teething ring before bed or, if your pediatrician has recommended it, an appropriate dose of pain relief before the bedtime routine. Address the pain before sleep so it doesn’t become the reason for a 3 a.m. wake-up, but avoid creating a new middle-of-the-night habit around it.
How Long This Takes
The 8-month sleep regression typically lasts two to six weeks if nothing changes. With a consistent approach to scheduling, bedtime routines, and nighttime responses, most babies start sleeping significantly longer stretches within one to two weeks. Some nights will be worse than others, especially if a new tooth is coming in or your baby just mastered a new skill like pulling to stand. That’s normal. The overall trend matters more than any single rough night.
If your baby was sleeping through the night before and suddenly stopped, that’s almost certainly the developmental regression at work, and it will pass. If your baby has never slept through the night, 8 months is an excellent time to start teaching independent sleep skills, because your baby is old enough to self-soothe and, for most formula-fed babies, old enough to go without a nighttime feed.