Most babies can sleep through the night (typically defined as a six- to eight-hour stretch) somewhere between 4 and 6 months of age, once their internal clock matures and their stomach can hold enough milk to go longer without feeding. Getting there, though, takes a combination of the right environment, a predictable daytime schedule, and a consistent approach at bedtime. Here’s what actually works.
Why Babies Wake Up at Night
Newborns don’t produce meaningful amounts of melatonin, the hormone that signals nighttime sleepiness. Around 3 to 4 months, melatonin production starts syncing with the natural light-dark cycle, and by about 6 months it resembles an adult pattern. Before that biological shift happens, no amount of sleep training will override your baby’s brain chemistry. If your baby is younger than 4 months, focus on building good habits rather than expecting long stretches.
Even after that shift, hunger remains the most common reason babies wake. Their stomachs are small, and younger infants genuinely need overnight calories. As daytime feeding increases, nighttime hunger naturally drops. The other major disruptors are developmental: teething pain, the excitement of learning to roll or crawl, and separation anxiety, which tends to peak around 9 months.
Set Up the Right Sleep Environment
Keep the room between 61 and 68°F (16 to 20°C). This range lowers the risk of SIDS and helps your baby stay comfortable without heavy blankets, which shouldn’t be in the crib anyway. The sleep space should have a firm, flat mattress with only a fitted sheet on it. No pillows, stuffed animals, bumpers, or loose blankets. Your baby should sleep on their back, in their own crib or bassinet, with no other people on the same surface.
Darkness matters more than most parents realize. A truly dark room supports melatonin production, so blackout curtains or shades are worth the investment. White noise can help mask household sounds, but keep the volume moderate and the machine across the room rather than right next to the crib.
Get the Daytime Schedule Right
How long your baby stays awake between naps, often called “wake windows,” directly affects how well they sleep at night. Too little daytime sleep leaves them overtired and wired. Too much, and they’re not tired enough at bedtime. The sweet spots shift as your baby grows:
- 3 to 4 months: 1.25 to 2.5 hours awake between naps
- 5 to 7 months: 2 to 4 hours
- 7 to 10 months: 2.5 to 4.5 hours
- 10 to 12 months: 3 to 6 hours
The last wake window of the day, the stretch between the final nap and bedtime, is the most important one. If it runs too long, your baby hits a second wind of cortisol-fueled alertness that makes falling asleep harder and staying asleep less likely. Watch for sleepy cues like eye rubbing, yawning, and fussiness, and start your bedtime routine before those cues intensify.
Build a Consistent Bedtime Routine
A short, predictable sequence of events before bed teaches your baby’s brain that sleep is coming. This doesn’t need to be elaborate. A bath, a feed, a book, a song, and into the crib works well. The whole routine can take 20 to 30 minutes. What matters is doing the same steps in the same order every night, so your baby learns the pattern.
The single most important habit to build is putting your baby down drowsy but awake. If your baby always falls asleep while being rocked or fed, they’ll need that same help every time they naturally wake between sleep cycles overnight (which all humans do, roughly every 45 to 90 minutes). A baby who can drift off independently in the crib can link those cycles together without calling for you.
Use Dream Feeds to Stretch Sleep
A dream feed is a feeding you offer between 10 and 11 p.m., right before you go to bed, without fully waking your baby. You lift them gently, offer the breast or bottle, and lay them back down. Studies suggest this can extend the next sleep stretch by three to four hours, since hunger is the most likely reason they’d wake. Increasing overall daytime calories also reduces the need for overnight feeds, so offering fuller or more frequent daytime feedings can help your baby go longer at night.
Dream feeds work best for babies between about 3 and 9 months. Once your baby is eating solid foods and getting enough calories during the day, you can phase the dream feed out gradually by offering slightly less each night.
Sleep Training Methods That Work
If your baby is at least 4 to 6 months old, healthy, and gaining weight well, sleep training is a safe and effective option. There are several approaches, and the best one is whichever you’ll stick with consistently.
Graduated Checks (Ferber Method)
Put your baby down awake, leave the room, and wait a set number of minutes before going back in to briefly reassure them (a pat, a few calm words) without picking them up. The first night, you wait three minutes before the first check, then extend each interval. The second night, you start at five minutes. Each night, the initial wait gets a little longer. Most families see significant improvement within three to five nights. The first night or two can be rough, but the intervals give your baby space to practice falling asleep while knowing you’re still nearby.
Full Extinction
This approach skips the check-ins entirely. You complete the bedtime routine, put your baby down awake, and don’t return until morning (or a scheduled feeding time). It sounds harder, and the first night often involves more crying, but it typically produces results faster because the check-ins themselves can sometimes re-stimulate a baby who was close to settling.
No-Cry Approach
If you’re not comfortable with extended crying, the gentlest option lets you go in and comfort your baby every time they cry. The key rule: always put them back in the crib while they’re still awake. You can pick them up, soothe them, and set them down again as many times as needed. This builds the same core skill (falling asleep independently in the crib) but takes longer, often two to three weeks instead of one.
Whichever method you choose, consistency is more important than the method itself. Switching approaches midway or giving in on some nights but not others sends mixed signals and draws the process out.
Sleep Regressions Are Temporary
Even babies who have been sleeping well will hit rough patches. The most common regressions happen around 4 months (when the circadian rhythm is maturing), 8 to 9 months (separation anxiety and new mobility skills like crawling and pulling up), and 12 months (walking and the transition from two naps to one). During these phases, babies who previously slept through the night may suddenly start waking again.
Regressions typically last two to four weeks. The best strategy is to stay as consistent as possible with your existing routine. Offer comfort when needed, but try not to introduce new sleep associations (like bringing them into your bed or rocking them to sleep again) that you’ll later need to undo. Babies who practiced a new motor skill obsessively during the day tend to settle faster at night once the novelty wears off.
Putting It All Together
The order of operations matters. Start by optimizing the sleep environment and daytime schedule, since these lay the groundwork for everything else. Next, establish a bedtime routine that ends with your baby going into the crib awake. If your baby is old enough and you’re still dealing with frequent wakings after a week or two of consistent routines, choose a sleep training method and commit to it for at least five to seven nights before evaluating whether it’s working. Most healthy babies over 6 months are physiologically capable of sleeping 10 to 12 hours overnight without a feed. Getting there is less about any single trick and more about layering the right conditions together and staying the course.