Most 6-month-olds are developmentally ready to sleep 6 to 8 hours without waking, and many can go even longer with the right habits in place. The key is building a consistent routine, ensuring your baby can fall asleep independently, and addressing common disruptors like teething, hunger, and developmental leaps. Here’s how to put it all together.
What “Sleeping Through the Night” Actually Means
Babies between 4 and 12 months need 12 to 16 hours of total sleep per 24-hour period, split between nighttime sleep and two or three daytime naps. “Sleeping through the night” at this age typically means a stretch of 6 to 8 consecutive hours, not 10 or 12. Your baby may still wake briefly between sleep cycles but ideally resettles without needing you.
The single biggest factor in whether a baby sleeps through the night is whether they can fall asleep on their own at bedtime. A baby who is rocked, nursed, or bounced to sleep will look for that same help every time they wake between sleep cycles, which happens naturally several times per night. Teaching your baby to fall asleep independently in the crib is the foundation everything else is built on.
Make Sure Daytime Calories Are Covered
At 6 months, most babies no longer need nighttime feeds for nutritional reasons, especially formula-fed babies. Formula digests more slowly than breast milk, so a formula-fed baby over 6 months who wakes at night is unlikely to be waking from hunger. Breastfed babies sometimes still benefit from one overnight feed, but many are ready to drop it.
To set your baby up for a full night, make sure they’re getting plenty of milk and solid food during the day. If you’re introducing solids (which most pediatricians recommend starting around 6 months), offering a feeding earlier in the evening and a final milk feed close to bedtime helps ensure your baby’s tank is full. If you want to phase out a remaining night feed, you can gradually reduce the volume of the bottle or the time spent nursing over the course of a week or two, rather than cutting it abruptly.
Build a Predictable Bedtime Routine
A short, repeatable sequence of events before bed signals to your baby’s brain that sleep is coming. This doesn’t need to be elaborate. A warm bath, a clean diaper, pajamas, a feeding, a book or song, and then into the crib drowsy but awake is a classic sequence that works well. The whole routine should take about 20 to 30 minutes and happen in roughly the same order each night.
Consistency matters more than the specific steps. Your baby’s body produces its own melatonin (it starts around 8 weeks of age), and the release is triggered by darkness. Dimming the lights in your home about 30 minutes before bedtime and avoiding screens in the room helps that natural process kick in. During the day, exposure to natural sunlight reinforces the difference between day and night, strengthening your baby’s circadian rhythm over time.
Set Up the Right Sleep Environment
The recommended nursery temperature is 16 to 20°C (roughly 61 to 68°F). Keeping the room in this range reduces the risk of overheating, which is linked to sudden infant death syndrome. If you’re unsure whether your baby is too warm, feel the back of their neck or chest rather than their hands or feet, which tend to run cool.
Your baby should sleep on their back, on a firm flat mattress with a fitted sheet, in their own crib, bassinet, or portable play yard. Keep the sleep space clear of loose blankets, pillows, stuffed animals, and bumpers. A sleep sack or wearable blanket is a safe way to keep your baby warm without loose bedding. White noise at a moderate volume can help mask household sounds and create a consistent auditory cue for sleep.
Sleep Training Approaches That Work
If your baby is healthy, gaining weight well, and at least 4 to 6 months old, sleep training is a safe and effective option. There’s no single best method. The best approach is the one you and your partner can stick with consistently until the new pattern becomes habit.
Graduated Check-Ins (Ferber Method)
You put your baby down awake, leave the room, and return to briefly check on them at gradually increasing intervals (say, 3 minutes, then 5, then 10). You don’t pick them up during checks. You offer a quick verbal reassurance and leave again. Most families see significant improvement within 7 to 10 days. The first two or three nights are usually the hardest, with crying that can feel intense but typically decreases rapidly.
The Chair Method
You sit in a chair next to the crib while your baby falls asleep. Each night, you move the chair a bit farther from the crib until you’re eventually outside the room. This is gentler but slower, often taking up to four weeks. It works well for parents who want to be physically present but are willing to commit to a longer timeline.
Whichever method you choose, the critical rule is consistency. Picking a method and then abandoning it after two rough nights teaches your baby that enough crying will eventually change the outcome, which makes the next attempt harder. Commit to at least a full week before evaluating whether it’s working.
The 6-Month Sleep Regression
Just when you think you’ve got a rhythm, your baby may start waking more. Around 6 months, babies are learning to sit up and may be starting to crawl. This significant leap in physical ability can temporarily disrupt sleep. Their brains are processing new skills even during rest, and some babies will practice sitting or rolling in the crib instead of sleeping.
This regression is normal and temporary. The best response is to stay consistent with your routines rather than introducing new sleep crutches (like bringing your baby into your bed or restarting a dropped night feed). If your baby rolls onto their stomach and gets stuck, give them plenty of tummy time during the day so they build the strength to roll back on their own.
Teething Pain and Night Waking
Many 6-month-olds are cutting their first teeth, and teething is a real sleep disruptor. Signs include excessive drooling, chewing on hands or objects, swollen gums, and a mild temperature elevation (up to 100.4°F). Each tooth can cause about two weeks of disrupted sleep, roughly a week on either side of eruption.
Teething pain tends to be worse at night because there are fewer distractions. A chilled (not frozen) teething ring before bed can help, and your pediatrician can advise on appropriate pain relief if your baby seems genuinely uncomfortable. The important distinction: teething causes mild fussiness and gum soreness, not vomiting, high fevers, or diarrhea. If your baby has those symptoms, something else is going on.
Naps Affect Nighttime Sleep
A baby who naps too little during the day becomes overtired, which paradoxically makes nighttime sleep worse. Overtired babies produce more stress hormones, making it harder for them to settle and stay asleep. At 6 months, most babies do well with two to three naps totaling 2.5 to 3.5 hours, with wake windows of about 2 to 2.5 hours between sleep periods.
The last nap of the day is the trickiest. If it runs too late, it pushes bedtime later and disrupts the night. If it’s skipped entirely, your baby hits bedtime overtired. Aim to have your baby awake for at least 2.5 hours before the final bedtime, and keep the last nap short (30 to 45 minutes) if it’s happening in the late afternoon. A consistent bedtime between 6:30 and 7:30 p.m. works for most 6-month-olds, aligned with their natural melatonin production cycle.
When Progress Stalls
Some babies take to independent sleep quickly, and others need more time. Illness, travel, growth spurts, and vaccinations can all cause temporary setbacks. After a vaccination, for example, babies commonly sleep more for a day or two. During a cold or viral illness (which is common in the first year as their immune system develops), prioritize comfort and hydration over sleep training rules, then return to your normal approach once they’ve recovered.
If you’ve been consistent with a sleep training method for two full weeks and see no improvement at all, it’s worth reassessing. Sometimes the issue is a schedule problem (bedtime too late, nap transitions), a physical issue (reflux, ear infection, undiagnosed food sensitivity), or a room environment factor like temperature or light leaks. Small adjustments often unlock progress that felt stuck.