4 Month Old Sleep Schedule: Surviving the Regression + Sample Day
Four months is the most talked-about age in baby sleep -- because of the 4-month sleep regression. Sleep cycles mature into a more adult-like pattern, so babies wake between cycles and need help getting back down. A solid schedule and a little sleep independence make all the difference.
This page is part of the baby sleep schedule by age series. If you're arriving from the 3-month schedule, expect longer wake windows now.
4-month-old sleep at a glance
| Measure | 4 months |
|---|---|
| Total sleep / 24h | 12-15 hours |
| Wake window | 1.5-2.25 hours |
| Naps per day | 3 (sometimes 4) |
| Longest night stretch | 6-9 hours |
| Day sleep | 3-4 hours |
Sample 4-month-old day (3 naps)
| Time | What's happening |
|---|---|
| 7:00 | Wake + feed |
| 8:45 | Nap 1 |
| 10:15 | Wake + feed |
| 12:15 | Nap 2 |
| 1:45 | Wake + feed |
| 3:45 | Nap 3 (short) |
| 4:30 | Wake + feed |
| 6:15-6:45 | Bedtime routine + down |
| Overnight | 1-2 feeds (varies) |
Adjust with wake windows: roughly 1.5 hours after waking, then 2-2.25 hours by the last window before bed. An earlier bedtime helps during the regression.
What the 4-month regression really is
It's not a phase that passes -- it's a permanent upgrade to how your baby sleeps. They now move through light and deep sleep in cycles, and they fully rouse between cycles. If they only know how to fall asleep being rocked or fed, they'll need that same help to link cycles overnight.
The fix is helping your baby learn to fall asleep more independently:
- Put down drowsy but awake at least once a day.
- Keep a consistent, calming bedtime routine.
- Don't rush in at the first noise -- give a moment to resettle.
Naps at 4 months
Most babies are on 3 naps, with the third a short catnap. Short naps are still common while sleep matures. If naps fall apart, shorten the wake window before the nap by 10-15 minutes and make sure the room is dark.
Night sleep at 4 months
Night sleep can get bumpy during the regression -- more wakings, harder resettling. Protect it with an early-enough bedtime (overtiredness makes it worse), a dark room, and white noise. Many babies still need 1-2 night feeds; follow your pediatrician's guidance on night weaning.
Safe sleep: rolling changes things
By now many babies roll. Stop swaddling completely and use a sleep sack. If your baby rolls to their tummy on their own, you can leave them -- but always place them on their back to start. Review safe sleep basics.
This is exactly what Baby Signal is built for. Instead of guessing whether a short nap means the wake window was too long or too short, you describe what happened -- "down at 9:15, took 25 minutes to settle, woke after 35" -- and get one clear adjustment shaped by your baby's age and history. Get Baby Signal and stop second-guessing the clock.
The takeaway
A 4-month-old sleep schedule centers on 3 naps, 1.5-2.25 hour wake windows, and an earlier bedtime to absorb the 4-month regression. The regression is permanent, so the real work is helping your baby learn to fall asleep independently. Next: the 5-month schedule.
Frequently asked questions
How long should a 4 month old be awake between naps?
About 1.5 to 2.25 hours. Keep the first window shorter (around 90 minutes) and let the last window before bed be the longest.
How do I handle the 4 month sleep regression?
Treat it as a permanent change in sleep, not a phase. Help your baby learn to fall asleep independently by putting them down drowsy but awake, keeping a consistent bedtime routine, and moving bedtime a little earlier to avoid overtiredness.
How many naps should a 4 month old take?
Usually 3 naps, with the third often a short catnap. Some babies briefly take 4 on rough days. Short naps are still common as sleep cycles mature.
Should I stop swaddling at 4 months?
Yes, once your baby shows any sign of rolling you should stop swaddling and switch to a sleep sack, for safety. Always place baby on their back to sleep.
A note on this guide: Baby Signal’s articles are written to be practical and reassuring, drawing on guidance from recognized health authorities. This is general information, not medical advice — for urgent or personal health concerns, always contact your pediatrician or emergency services.
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