Published by Actually Sleeping · Reviewed by Dr. Samantha Abrahamson, PharmD · Review policy · Updated 2026-11-10

Sleep at 3 months: what’s normal, what’s hard, and when to get help

At 3 months, crying usually starts to ease and nights may get a little more organized, but there is still no AASM sleep target until 4 months. The main changes are physical: rolling attempts can start any time now (the AAP notes some babies begin as early as 2 months), so the swaddle has to go at the first sign, and the bassinet will soon be outgrown.

What is changing at 3 months

Colic is on its way out for most families. The AAP says colicky fussing declines to 1 or 2 hours a day by 3 to 4 months and generally stops by then, though it can last until 6 months.

Your baby is getting stronger. By 4 months, the CDC lists pushing up onto elbows or forearms during tummy time, holding the head steady, and bringing hands to mouth. Hands to mouth is a real self-settling tool, and many babies begin sucking fingers in the crib now.

The body clock is maturing. The AAP says regular sleep cycles appear at about 4 months, so the next few weeks are a period of change rather than a settled state.

Change at 3 months	What to do	Source
Rolling attempts (some babies start as early as 2 months)	Stop swaddling at the first sign; use arms-free sleepwear	AAP
Pushing up on hands and knees	Stop using the bassinet; CPSC says bassinets are not meant for use beyond about 5 months or once a baby can do this	CPSC
Pushing up on hands and knees, or 5 months	Remove hanging crib toys and mobiles, whichever comes first	AAP
Total sleep in studies, from 3 months	Average 13.6 hours; normal spread about 9 to 18 hours	Galland 2012

Your baby has now passed the 10-week birthday, which is when the Actually Sleeping guarantee clock starts. Three months is also when many parents notice that what worked as a newborn has stopped working. Dr. Sam writes a plan for your baby’s next stage, with bootcamp-style coaching before night one and night feeds left as your pediatrician wants them.

What parents find hardest

Leaving the swaddle. It has to go at the first sign of rolling, and many babies sleep worse for a while with free arms.
Naps that stay short. One cycle and awake is still common. Daytime sleeps averaged about 3 a day in studies of babies 0 to 5 months, with a lot of variation.
Newborn tricks stop working. Bouncing and rocking often lose their effect as your baby becomes more alert, just as sleep is about to change at 4 months.

Safe sleep at 3 months

Back to sleep for every sleep. Rolling is about to make positioning harder; the rule does not change until your baby can roll both ways.
No weighted products, no inclined surfaces over 10 degrees, no bumpers.
Keep room-sharing, ideally for at least the first 6 months, per the AAP. Bed-sharing risk is highest under 4 months.
Most SIDS deaths happen between 1 and 4 months, according to the NICHD. Do not relax the basics yet.

Night feeds

Some babies naturally space out night feeds now; others do not. Either way, how many night feeds your baby needs is your pediatrician’s call, not a calendar’s.

When to talk to the pediatrician

A rectal temperature of 100.4°F (38°C) or higher in a baby 3 months or younger: call immediately.
Crying that is increasing rather than settling, or continues past what you were told to expect.
Frequent snoring, struggling to breathe, or breathing pauses longer than 20 seconds (call 911).
Not yet bringing hands to mouth or lifting the head and chest on the tummy as 4 months approaches.

Next steps

The AAP’s advice for babies 4 months and older is to put them to bed drowsy rather than asleep, so the weeks ahead matter. How to get there depends on your baby’s feeds, temperament and current sleep habits, which is why Actually Sleeping writes a plan for your baby rather than handing you a list. Night feeds are never forced out. We guarantee that your baby will sleep 8–12 hours through the night within 14 days of consistent, correct implementation of your sleep plan. You can read what other families say on our newborn to 3 month reviews. Related: how to drop the swaddle, the 3-month schedule, and how sleep cycles develop. Book a free consultation with Dr. Sam to start.

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Frequently asked

Is it normal for my 3 month old to still cry in the evenings?

Yes, though it should be easing. The AAP says colicky fussing usually falls to 1 or 2 hours a day by 3 to 4 months and can last until 6 months. If it is getting worse, or comes with poor feeding or fever, call your pediatrician.

When should my 3 month old move out of the bassinet?

The CPSC says bassinets and cradles are not intended for use beyond about 5 months, or once a baby can push up on hands and knees, whichever comes first. Check your product’s own limits, which may be lower, and move to a crib in your room.

How much should a 3 month old sleep?

The AASM sets no target before 4 months. In a review of studies, babies from 3 months averaged 13.6 hours in 24 hours, with a normal spread from about 9 to 18 hours. Look at how your baby feeds, grows and behaves, not just the hours.