---
title: "Baby sleep at 4 months: schedule and what to expect"
description: "How much a 4-month-old sleeps, how many naps, wake windows, a flexible schedule, night sleep, and the safety warning about stopping the swaddle — and where the 4-month regression fits in."
canonical: https://buppi.baby/en/blog/baby-sleep-4-months/
last-updated: 2026-07-27
---

# Baby sleep at 4 months: schedule and what to expect

> How much a 4-month-old sleeps, how many naps, wake windows, a flexible schedule, night sleep, and the safety warning about stopping the swaddle — and where the 4-month regression fits in.
>
> Canonical: https://buppi.baby/en/blog/baby-sleep-4-months/

At 4 months, your baby's sleep takes on a slightly more defined rhythm — longer wake windows, naps starting to organize, and nights that, in many cases, stretch a little. At the same time, it's the age of the famous **4-month sleep regression**, which can throw everything off for a few weeks. This guide covers how much a 4-month-old usually sleeps, how many naps they take, wake windows, a flexible schedule, how night sleep looks, and an important safety warning — and points you to the dedicated regression guide if that's what you're living through.

## How much a 4-month-old sleeps

In total, a 4-month-old sleeps about [**12 to 16 hours a day**](/en/blog/how-long-should-baby-sleep-by-age/), counting night and naps, with the average around **14 to 15 hours**. It's a wide range: some babies need more sleep, others less, and that's normal. The best sign that things are fine isn't hitting a number — it's a baby who feeds well, gains weight, and is alert and interactive during awake times.

## The 4-month regression shows up here

If, around this age, your baby's sleep **suddenly gets worse** — more wakings, short naps, trouble resettling — it's very likely the **4-month sleep regression**. Despite the name, it's a **step forward**: sleep matures into more adult-like cycles, with brief awakenings between them. It's uncomfortable but temporary — and it's not the time to invent new habits you don't want to keep.

Because this topic has a lot to unpack (why it happens, how long it lasts, what helps, and how to tell it apart from other causes like fever or a growth spurt), it has its own guide: **[The 4-month sleep regression: why it happens and how to get through it](/en/blog/4-month-sleep-regression/)**. Here, the focus is the overall picture of sleep at this age.

## Wake windows at 4 months

The **[wake window](/en/blog/wake-windows-by-age/)** — how long your baby can comfortably stay awake between sleeps — is usually **90 to 120 minutes** (1.5 to 2 hours) at 4 months, sometimes closer to **2h15** for the last window of the day. Going much beyond that tends to leave the baby **overtired**: more wound up and, paradoxically, harder to settle, not easier.

Keep **reading sleepy cues** — yawning, a glazed stare, going quieter or fussier, rubbing their face, turning their head away from stimulation — instead of just timing. The clock is a guide; your baby is the map.

## Naps at 4 months

At 4 months, most babies take **3 to 4 naps a day**. They start settling into slightly more predictable times but still vary a lot in length. **Short 30- to 45-minute naps stay very common** — partly because of the sleep maturation itself, which now has shorter cycles during the day. After a short nap, the next window is usually a bit shorter too, so your baby doesn't build up overtiredness.

This isn't the time to force a fixed number of naps or to drop any: at 4 months your baby still needs frequent daytime sleep. Consolidation (fewer, longer naps) comes gradually over the following months.

## A flexible one-day schedule

There's no fixed schedule at 4 months, but an example helps picture the rhythm. Use it as an elastic reference, not a rule:

| Time (example) | What happens |
|---|---|
| 7:00 | Wakes and feeds |
| 8:30–9:45 | 1st nap |
| 11:15 | Feed, awake time |
| 11:30–12:30 | 2nd nap |
| 14:00 | Feed, awake time |
| 14:15–15:30 | 3rd nap |
| 16:45 | Feed, awake time |
| 17:15–17:45 | 4th nap (short, sometimes drops) |
| 19:00 | Feed, calm routine |
| 19:30–20:30 (varies) | Start of night sleep |
| Overnight | 1–2 wakings to feed |

Notice: **3 to 4 naps**, windows of 1.5 to 2 hours, and still **night wakings to feed**. Bedtime becomes a bit more consistent than at 3 months but still follows your baby's cues.

## Sleep at night

At 4 months, many babies manage a **longer night stretch** early in the night — but with the regression, it's common to have **more wakings** than at 3 months for a few weeks. That's not a sign something went wrong; it's sleep reorganizing. Many babies still **feed 1 to 2 times a night** — the frequency varies a lot, and **breastfed babies tend to feed more often** than formula-fed ones because breast milk is digested faster. None of that is a problem: night feeding stays normal and expected at this age, and it's not the time to cut night feeds on your own.

You help your baby reorganize with simple, consistent cues:

- **By day**: natural light, normal household noise, interaction and stimulation
- **By night**: low light, quiet voice, changing the diaper only if needed, and feeding in "quiet and boring" mode, no play — so you don't signal it's time to wake up

## Safety: time to stop the swaddle

This is one of the most important warnings of this stage. Many babies **start trying to roll** around 4 months — but it can show up as early as **2 to 3 months**, so don't tie it to a set age. A swaddled baby who flips onto their tummy **can't reposition**, which is a risk factor for suffocation and for sudden infant death syndrome (SIDS).

> **Stop swaddling at the first sign your baby is trying to roll** — don't wait for them to succeed, and don't wait for 4 months (it can be earlier). From then on, your baby sleeps with **arms free**. Keep the rest of sleep safe: always **on the back**, on a **firm, flat mattress** (crib or bassinet), **with no** pillows, cushions, bumpers or loose blankets, and **in the same room as the parents** (not the same bed) for at least the first 6 months. While your baby can't yet roll **both ways** on their own (back to tummy *and* back again), reposition them onto their back if they roll during sleep; once they've mastered rolling both ways, you don't need to keep flipping them all night. What matters is always **placing them down on their back**.

## What helps sleep at 4 months

Whether in everyday life or in the middle of the regression, what builds better sleep at 4 months is consistency and patience — not tricks. What tends to genuinely help:

- **Keep a light, predictable routine** before sleep (warm bath, feed, low light, a song), in the same order — the ritual signals "time to sleep"
- **Respect wake windows** to avoid overtiredness, which makes everything worse
- **Put your baby down drowsy but still awake** when you can — it helps them practice the skill of falling asleep in their own space, which is exactly the one they need between cycles
- **Don't invent, in a panic, habits you don't want to keep** for months

On **sleep training**: more structured methods are usually only considered from **4 to 6 months**, and whether to use them (or not) is the family's call — worth discussing with your pediatrician. None of it is mandatory: many babies get through the regression on consistency and time alone.

## When to talk to your pediatrician

The regression is normal, but it's worth talking to your pediatrician if:

- Your baby is **very sleepy**, hard to wake, and **doesn't wake to feed** enough
- There's **insufficient weight gain** or few wet diapers
- Your baby **snores loudly**, pauses in breathing, or seems to work hard to breathe while asleep
- The sleep trouble comes with **extreme irritability**, fever or other signs something's wrong
- You're **exhausted to the point of not coping** — asking for help is also caring for your baby

## What to expect next

Four months is a stage of rhythm-in-the-making — longer windows, naps starting to organize, and nights that stretch bit by bit — but also of adjustment, especially if the regression hits. On the other side, around [6 months](/en/blog/baby-sleep-6-months/), sleep tends to get more predictable, with more organized naps and longer nights. The trick stays the same as at [3 months](/en/blog/baby-sleep-3-months/): go at your baby's pace, with wake windows, a light routine, safe sleep and patience. And if the regression is your situation right now, the [dedicated guide](/en/blog/4-month-sleep-regression/) walks you through it.

## FAQ

### How much does a 4-month-old sleep per day?

Usually about 12 to 16 hours a day counting night and naps, with the average around 14 to 15 hours. There's a wide range of normal: if your baby is active, feeding well and gaining weight, things are probably fine even if they sleep a little more or a little less than average.

### What is the 4-month sleep regression?

It's a permanent change in how your baby sleeps: around 4 months sleep matures into adult-like cycles with brief awakenings between them. The baby who used to 'crash out' now wakes lightly at the end of each cycle and has to relearn how to fall back asleep. That's why nights get worse for a few weeks. Despite the name, it's a developmental step forward, not a step back.

### Does a 4-month-old sleep through the night?

Some 4-month-olds already do a longer stretch early in the night, but sleeping all the way through without waking isn't the rule yet: most wake 1 to 2 times to feed, and that's normal and expected at this age. With the 4-month regression, it's common to have even more wakings for a few weeks.

### How many naps does a 4-month-old take?

Typically 3 to 4 naps a day. They start settling into slightly more predictable times but still vary in length. Short 30- to 45-minute naps stay common at this stage, partly because of the sleep maturation itself.

### What's the wake window (awake time) at 4 months?

Around 90 to 120 minutes (1.5 to 2 hours) awake between sleeps, sometimes closer to 2h15 by the end of the day. Going much beyond that tends to leave the baby overtired and, paradoxically, harder to settle. Watching sleepy cues still beats watching the clock.

### Do I need to stop swaddling at 4 months?

Yes — stop swaddling at the first sign your baby is trying to roll. That often shows up around 4 months, but it can start as early as 2 to 3 months, so don't wait for a set age or for them to actually roll. A swaddled baby who flips onto their tummy can't reposition and is at risk of suffocation. Keep placing them on their back, now with arms free.