4 Month Old Wake Windows & Sleep Schedule
Most 4 month olds can stay awake for 1¾ to 2½ hours and take 3 to 4 naps. This is also the age of the well-known 4-month sleep regression, when sleep cycles mature and night waking often increases for a few weeks.
- Wake window
- 1¾–2½ hours
- Naps
- 3–4 a day
- Day sleep
- 3–4.5 h
- Night sleep
- 10–12 h
- Total in 24 h
- 12–16 h
Reviewed by Pediatric sleep consultant (TBC) · Updated 2026-09-25
Next nap for your 4 month old
Next nap
8:45 am
after 1 h 45 min awake · typical 1¾–2½ hours
See the whole day
- 7:00 am Morning wake-up
- 8:45 am Nap 1 · until 10:05 am
- 12:05 pm Nap 2 · until 1:25 pm
- 3:40 pm Nap 3 · until 4:20 pm
- 6:50 pm Bedtime
Get a reminder before 8:45 am. The Wake Windows app pings you when the window is closing and re-plans the day when naps run short.
Sample schedules
4 month old sleep schedule
These schedules use 3 naps and wake windows that lengthen from 1 h 45 min in the morning to 2 h 30 min before bed. Pick the one closest to your baby's wake-up time and shift it by the difference.
Up at 6:00 am
- 6:00 am Morning wake-up
- 7:45 am Nap 1 · until 9:05 am
- 11:05 am Nap 2 · until 12:25 pm
- 2:40 pm Nap 3 · until 3:20 pm
- 5:50 pm Bedtime
Up at 7:00 am
- 7:00 am Morning wake-up
- 8:45 am Nap 1 · until 10:05 am
- 12:05 pm Nap 2 · until 1:25 pm
- 3:40 pm Nap 3 · until 4:20 pm
- 6:50 pm Bedtime
Up at 8:00 am
- 8:00 am Morning wake-up
- 9:45 am Nap 1 · until 11:05 am
- 1:05 pm Nap 2 · until 2:25 pm
- 4:40 pm Nap 3 · until 5:20 pm
- 7:50 pm Bedtime
How 4 month old wake windows change through the day
The first wake window of the day is the shortest. Each one after a nap gets a little longer, with the longest just before bedtime:
| Window | Length |
|---|---|
| First window (after morning wake-up) | 1 h 45 min |
| After nap 1 | 2 h |
| After nap 2 | 2 h 15 min |
| Last window (before bedtime) | 2 h 30 min |
What's changing for your 4 month old
- The 4-month regression is a permanent change to how babies sleep, not a phase to wait out.
- Many babies drop from 4 naps to 3 between 4 and 5 months.
- Rolling is common; the AAP says no swaddles once rolling starts.
- Falling asleep independently becomes more important as cycles lengthen.
What comes next
At 5 months most babies settle into 3 naps with wake windows of 2–2¾ hours.
Wake windows around 4 months
Guides for 4 months
Questions about 4 month old wake windows
What are wake windows for a 4 month old?
About 1¾ to 2½ hours. If naps are short, try adjusting the window by 10–15 minutes at a time.
How many naps does a 4 month old need?
3 to 4 naps. Babies with short naps usually need the fourth; those with longer naps often manage on 3.
How long does the 4-month sleep regression last?
It is usually most intense for 2 to 6 weeks. Consistent wake windows and a steady bedtime routine help babies adjust.
What time should a 4 month old go to bed?
Between 6:30 and 8 pm is typical. On short-nap days an earlier bedtime helps prevent overtiredness.