4 Month Old Sleep Schedule
Total sleep, nap count and wake windows for a 4-month-old — with a template day built from your baby’s real wake-up time.
Sleep needs at 4 months
12–15 h
total per 24 hours
The time your baby usually starts the day — the whole schedule is built from it.
Template day
Built from mid-range wake windows and typical nap lengths for this age. Shift each block by ±15–30 min to match your baby — the structure matters more than the exact times.
General reference ranges from the National Sleep Foundation and AAP consensus — not medical advice. Every baby is different.
The 4-Month Sleep Regression & the 4→3 Nap Shift
Around 4 months your baby’s sleep architecture matures: instead of dropping straight into deep newborn sleep, they start cycling through light and deep stages the way an adult does. That is the so-called 4-month sleep regression — badly named, because it is a progression that does not reverse. The night wakings and short naps that show up now are your baby surfacing between cycles and not yet knowing how to link them back together.
On the day this looks like more catnaps and a wobbly fourth nap. Many 4-month-olds are still on 4 short naps but drifting toward 3 longer ones over the next 4–6 weeks. Do not force the drop — let the last catnap fade on its own as wake windows stretch past 90 minutes and naps slowly lengthen.
Wake windows now sit around 1.5–2 hours, shortest in the morning and longest before bed. While naps are still consolidating, protect an early bedtime: an overtired 4-month-old in the middle of the regression wakes more at night, not less.
The 4-month regression is developmental, not a habit you broke. It settles as your baby learns to link sleep cycles — usually within 2–6 weeks.
How to Read This Schedule
The template below chains 4 short naps from the wake-up time using roughly 1.75-hour wake windows. If your baby is already stretching to 3 naps, drop the last catnap and add 15–20 minutes to each window.
Wake windows widen across the day, so the first nap comes soonest and bedtime lands about one window after the last nap ends. Shift any block by ±15–30 minutes to match your baby.
Sources & Limitations
Sleep totals and age bands follow published recommendations; the month-by-month nap counts and wake windows reflect the ranges used across pediatric sleep consulting. Wake windows themselves are not an official AAP or WHO metric — treat everything here as a well-tested starting point, not a rule.
- AAP / HealthyChildren.org — Healthy Sleep Habits: How Many Hours Does Your Child Need?
- Sleep Foundation — How Much Sleep Do Babies and Kids Need?
- AASM — Recommended Amount of Sleep for Pediatric Populations (AAP-endorsed consensus)
- NHS — Helping Your Baby to Sleep
General reference ranges, not medical advice — every baby is different. This page doesn't cover safe-sleep practices or sleep problems; for those, and for anything that worries you, talk to your pediatrician or family doctor.
Track their real rhythm, not the theory
Doudou logs every nap and night in two taps and shows how long your baby has actually been awake — so you can tune this schedule to your baby, not the other way around. Synced between both parents.
Keep Exploring
Related Tools
Baby Wake Windows
Wake windows chart by age (0–36 months) plus a next-nap calculator.
Baby Sleep Timeline
Personalized dates for growth spurts, sleep regressions and nap transitions, from your baby's birth date.
Corrected Age Calculator
Chronological vs corrected age for premature babies, from birth and due dates.
Frequently Asked Questions
- Why is my 4-month-old suddenly waking every hour at night?
- Almost always the 4-month sleep change: your baby now cycles between light and deep sleep and briefly wakes at each transition. Until they learn to re-settle on their own, those brief wakings turn into full ones. It is developmental and temporary, not something you caused — keep nights calm, dark and boring, and protect daytime sleep so overtiredness does not stack on top.
- How many naps should a 4-month-old take?
- Three to four. Most 4-month-olds are moving from 4 short catnaps toward 3 longer naps over the following month or so. Total daytime sleep of roughly 3–5 hours matters more than the exact number — count naps loosely and follow wake windows instead.
- How long should wake windows be at 4 months?
- About 1.5–2 hours, and they are not equal: the first window after the morning wake-up is the shortest and the one before bed is the longest. After a short 30-minute nap, use the low end of the range for the next window.
- How long does the 4-month sleep regression last?
- Usually 2–6 weeks. Because it is actually a permanent maturation of sleep, the sleep itself does not “go back” — what improves is your baby’s ability to link cycles. Consistent, predictable naps and an early bedtime shorten the rough patch.
- Should I drop the 4th nap at 4 months?
- Not on a schedule. Keep offering the last catnap until wake windows naturally stretch past about 1.5–2 hours and the nap starts refusing itself. Dropping it early tends to push bedtime too late and backfire with overtiredness.
- What time should a 4-month-old go to bed?
- Commonly between 6:30 and 8:00 pm, set by when the last nap ends rather than the clock. After short or skipped naps, move bedtime earlier — an earlier bedtime is the standard fix at this age, never a later one.