How many naps should a 3 month old have?

Four to five, and the number matters less than the wake windows between them. Some 3 month olds take two long naps and three catnaps; others take five short ones. Both are normal as long as total daily sleep lands somewhere around 14 to 17 hours.

What is a normal wake window at 3 months?

Roughly 75 to 105 minutes, shortest in the morning and longest before bedtime. If your baby consistently melts down before 75 minutes, treat that as their real window rather than forcing the average.

Should I wake one twin when the other wakes?

In the morning, yes. Waking the later twin within about 30 minutes of the first is the single most effective way to get overlapping naps. During the day it is usually better to let a nap finish and adjust the next window instead.

Is it normal for a 3 month old to sleep through the night?

Some do a five to six hour stretch, many do not, and both are within normal range. Night waking at 3 months is developmentally expected, particularly for babies who were born early, where corrected age matters more than birth date.

Why has my 3 month old suddenly started fighting naps?

The most common cause is a wake window that has quietly grown too long as they got older. Try pulling the first window back by 10 to 15 minutes for a few days before concluding anything about a regression.

Do twins need the same schedule?

They need the same anchor points, not identical sleep. Matching morning wake-up and roughly matching nap start times gets you overlapping sleep, which is what actually gives you a break, even if one twin naps 20 minutes longer.

3 month old sleep schedule and wake windows (with twins)

3 month old sleep schedule

EmmaSep 23, 2026

Quick answer

At 3 months most babies sleep 14 to 17 hours across the day, split into roughly 4 to 5 naps and a longer night stretch, with wake windows of about 75 to 105 minutes between sleeps. Watch the clock rather than waiting for yawning, because an overtired 3 month old fights the nap you were aiming for. With twins, anchor the morning wake-up at the same time for both and let the rest of the day fall out of that, rather than running two separate schedules.

At 3 months the day stops being random. Newborn sleep arrives whenever it likes; by twelve weeks most babies have a shape to the day, and you can work with it. The shape is loose, and it is not a timetable, but it is real.

Here is what most 3 month olds land on: 14 to 17 hours of sleep across 24 hours, four or five naps, and wake windows of roughly 75 to 105 minutes. Shortest window first thing in the morning, longest before bed.

A day that actually works

Time	What happens	Wake window
7:00	Wake and first feed	-
8:15	Nap 1 (45 to 90 min)	75 min
9:45	Wake, feed, play	-
11:15	Nap 2 (60 to 120 min)	90 min
13:00	Wake, feed	-
14:30	Nap 3 (45 to 90 min)	90 min
16:00	Wake, feed	-
17:30	Catnap (20 to 40 min)	90 min
19:15	Bedtime routine, then bed	105 min

Treat the times as a sketch. The wake windows are the part to hold onto, because they are what keeps a baby from arriving at a nap already overtired.

The mistake almost everyone makes

Waiting for tired cues. At 3 months, yawning and eye-rubbing are late signals, not early ones. By the time you see them you are usually past the window, and a baby who is past the window fights the nap you are trying to give them. That fight is what people mean when they say their baby "hates naps".

Watch the clock for a week instead. Start the wind-down at 75 minutes in the morning whether or not anyone looks sleepy. Most parents are surprised how much easier the first nap gets.

What is different with two

Everything above applies to each baby separately. The problem is that two babies on separate schedules means you never get a break, because someone is always awake.

One decision fixes most of it: wake them both in the morning within about half an hour of each other. Everything downstream runs off that anchor. If Twin A wakes at 6:40 and Twin B would happily sleep to 7:40, you wake Twin B at around 7:10. It feels wrong to wake a sleeping baby. Do it anyway for a week and see what happens to your afternoon.

During the day, the rule flips. If one twin wakes from a nap first, let the other finish rather than rousing them, and shorten the next wake window for whoever is ahead. You bring them back together at the next transition instead of cutting sleep short.

A size or prematurity difference between twins matters here. If your babies were born early, use corrected age for wake windows, and expect the smaller twin to need slightly shorter ones.

When the schedule falls apart

Around 14 to 16 weeks, a 3 month old who was sleeping predictably often starts waking more and napping worse. That is usually the 4 month sleep regression arriving early, and it is a permanent change in how sleep is structured rather than a phase that reverses. Nothing in the schedule above prevents it. Holding the wake windows steady through it is what shortens it.

Where the app fits

The useful thing at this age is not more advice, it is a record. Multibaby logs each wake and each nap for both babies by voice, so a week later you can see whether the twins' mornings are converging or drifting, and where in the day the wheels come off. You can also run the numbers yourself with the wake window calculator.

Frequently asked questions

How many naps should a 3 month old have?: Four to five, and the number matters less than the wake windows between them. Some 3 month olds take two long naps and three catnaps; others take five short ones. Both are normal as long as total daily sleep lands somewhere around 14 to 17 hours.
What is a normal wake window at 3 months?: Roughly 75 to 105 minutes, shortest in the morning and longest before bedtime. If your baby consistently melts down before 75 minutes, treat that as their real window rather than forcing the average.
Should I wake one twin when the other wakes?: In the morning, yes. Waking the later twin within about 30 minutes of the first is the single most effective way to get overlapping naps. During the day it is usually better to let a nap finish and adjust the next window instead.
Is it normal for a 3 month old to sleep through the night?: Some do a five to six hour stretch, many do not, and both are within normal range. Night waking at 3 months is developmentally expected, particularly for babies who were born early, where corrected age matters more than birth date.
Why has my 3 month old suddenly started fighting naps?: The most common cause is a wake window that has quietly grown too long as they got older. Try pulling the first window back by 10 to 15 minutes for a few days before concluding anything about a regression.
Do twins need the same schedule?: They need the same anchor points, not identical sleep. Matching morning wake-up and roughly matching nap start times gets you overlapping sleep, which is what actually gives you a break, even if one twin naps 20 minutes longer.