When Do Babies Sleep Through the Night?

Here is the honest answer before the detail: later than the internet suggests, and "through the night" does not mean what most people think it means. In sleep research, a baby "sleeping through" usually means a stretch of five or six hours. Midnight to 5am counts. Nobody mentions this at the baby shower.

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A realistic timeline

In the first three months, most babies sleep in stretches of two to four hours around the clock, and many have day and night mixed up for the first few weeks. This phase is about surviving, feeding and resting where you can. It is not a training window and nothing is going wrong.

Somewhere around three to six months, longer stretches start to appear for some babies, and this is when a simple bedtime routine starts to mean something. Around six months, many babies can manage a long stretch without a night feed. Plenty still wake, and that is within normal too.

From six to twelve months, progress is not a straight line. Teething, illness and big milestones like rolling, crawling and standing all borrow sleep for a while, and regressions can undo weeks of progress overnight before things settle again. And some children go on waking at night well into toddlerhood. A baby who wakes is not a verdict on your parenting.

What actually helps

You cannot make a baby sleep through the night before they are ready. What you can do is make the path easy for when they are.

Make days and nights feel different. Days bright, noisy and sociable; nights dark, quiet and deeply boring. Night feeds happen in dim light with minimal chat, businesslike and brief.

Fill the days with food. Babies who take good daytime feeds have less reason to make up the calories at 3am. If a night feed is dropping away on its own, let it.

Start a short bedtime routine from around three months. Feed, bath if it is bath night, sleeping bag, dim room, a song, cot. Five to fifteen minutes is plenty. The point is the pattern, because the pattern becomes the cue.

Give them occasional practice at falling asleep in the cot, awake. Not every time, and not as a test. Some of the time, when they are calm and drowsy, put them down and see. When it goes wrong, rescue them without guilt. It is practice, not a pass-or-fail exam.

Safer sleep comes first

Whatever else you try: on their back, on a clear flat surface, in their own sleep space in your room for the first six months, in a room around 16 to 20 degrees. The NHS and the Lullaby Trust cover safer sleep properly and their guidance beats anything an app, a forum or a well-meaning relative tells you, this site included.

What does not help

Starting solids early to force longer sleep. The evidence does not back it, and current guidance puts weaning at around six months, so this one buys you nothing except an earlier introduction to flung porridge.

Comparing your baby with the one next door who "slept through at eight weeks". That baby is either an outlier or being measured with a very generous definition. Probably both.

Blaming yourselves. Babies vary enormously and much of the variation is temperament, not technique.

If sleep suddenly fell apart at four months

That is the four-month regression, and it is actually a permanent change dressed up as a crisis: adult-style sleep cycles arriving all at once, which means more surfacing between cycles and more chances to notice you have gone. It has its own guide, because it deserves one.

When to talk to your GP or health visitor

If your baby seems unwell, is not gaining weight as expected, snores loudly or has pauses in breathing, or if anything about their sleep worries your gut, skip the routines and talk to your GP or health visitor first.

Quick answers

When can babies sleep through without a night feed?

Many babies can manage it somewhere around six months, but the range is wide. If you are unsure whether yours still needs night feeds, ask your health visitor before dropping anything, especially if weight gain has been a concern.

When should a baby sleep in their own room?

Current UK guidance is their own sleep space in your room for the first six months. After that, moving them to their own room is a family decision, and plenty of babies sleep better for it.

Why did my baby's sleep suddenly get worse?

Usually a regression, teething or a milestone in progress. Hold the routine steady and it typically rights itself. If it comes with illness or feeding changes, check with your GP or health visitor.