Most babies are ready to move from the SNOO to a crib between 5 and 6 months old, and the process works best when you break it into gradual steps rather than making the switch all at once. The key is starting before your baby hits the hard deadline: the SNOO is no longer safe once your baby can push up onto their hands and knees or weighs about 25 pounds.
The transition involves three main changes: removing the swaddle, turning off the motion, and moving to a new sleep surface. Tackling these one at a time, over roughly two to three weeks, gives your baby time to adjust without a total sleep meltdown.
When Your Baby Is Ready
The SNOO was designed for babies up to 6 months. But age alone isn’t the trigger. Watch for these developmental signs that tell you it’s time:
- Rolling over frequently or attempting to roll in the SNOO
- Pushing up on hands and knees, which means your baby has outgrown the SNOO’s safety design
- Trying to sit up or showing significantly increased mobility
- Approaching 25 pounds, the upper weight limit for the SNOO
If your baby shows any of these signs before 5 months, you’ll need to move faster. A baby who can roll needs to have their arms free, full stop. That’s a safety issue, not a preference.
On the other end, don’t start too early just because you’re eager to free up the SNOO. Parents who try transitioning at 3 or 4 months often see initial success followed by a sleep regression or growth spurt that derails everything. Waiting until 5 or 6 months tends to produce a smoother process because your baby’s sleep patterns are more consolidated by then.
Step 1: Free the Arms
The SNOO’s built-in swaddle is one of the biggest comfort features your baby will lose, so tackle it first while everything else stays the same. Start by unzipping one arm from the swaddle sack so your baby sleeps with one arm out. Keep the motion and white noise running as usual. After a few nights of solid sleep in that position, free the second arm.
If your baby starts waking frequently once an arm is out, that’s a sign they aren’t quite ready. Put the arm back in, wait a few days, and try again. There’s no penalty for going at your baby’s pace here. Some babies adjust in two or three nights per arm; others need a full week. The goal is consistent, decent sleep at each stage before moving to the next one.
Step 2: Turn On Weaning Mode
Once your baby is sleeping comfortably with both arms out, activate the SNOO’s Weaning Mode through the app. This setting keeps the white noise playing all night but stops the rocking motion. The SNOO will only rock if your baby cries, then return to stillness once they settle.
There’s one important prerequisite: Weaning Mode only works when the SNOO is set to its baseline level (the lowest motion setting). If you’ve been running the SNOO at a higher baseline, dial it back to the default about two weeks before you plan to start weaning. This lets your baby gradually get used to less motion before you cut it almost entirely.
Weaning Mode essentially turns the SNOO into a flat, still bassinet with white noise. Your baby is learning to fall asleep and stay asleep without rocking, which is exactly what a crib will require.
Step 3: Move to the Crib
After several nights of good sleep in Weaning Mode with both arms free, your baby is already doing the hard part. The crib itself is the smallest adjustment at this point, because your baby has already learned to sleep without motion and without a swaddle.
Some parents start with naps in the crib before moving nighttime sleep there. This lets your baby get familiar with the new space during the day when sleep pressure is lower and you have more flexibility. Once naps go smoothly for a few days, move bedtime to the crib too.
You can also use a standalone white noise machine in the nursery to provide the same sound environment your baby is used to from the SNOO. Keeping at least one familiar element helps bridge the gap.
Setting Up a Safe Crib
The crib mattress should be firm and flat, meaning it doesn’t indent when your baby lies on it. Use a fitted sheet and nothing else. No blankets, no pillows, no stuffed animals, no bumper pads, no mattress toppers. The AAP is clear that all of these increase the risk of suffocation, entrapment, or strangulation.
Place your baby on their back for every sleep. Once babies can roll on their own (which yours likely can if they’re transitioning out of the SNOO), you don’t need to reposition them if they roll during the night, but always start them on their back.
One product to skip: weighted sleep sacks and weighted swaddles. They might seem like a comforting replacement for the SNOO’s snug feeling, but both the Consumer Product Safety Commission and the AAP recommend against using weighted products on or near your baby.
A regular, non-weighted sleep sack is a great option. It provides warmth and a cozy feeling without the safety concerns of a loose blanket.
Where to Put the Crib
The AAP recommends room sharing (not bed sharing) for at least the first 6 months. This means keeping the crib, bassinet, or portable play yard in your bedroom, close to your bed. If your baby is transitioning out of the SNOO right around the 5 to 6 month mark, you might keep the crib in your room initially and move it to the nursery a few weeks later, or go straight to the nursery if your baby is past 6 months.
If the crib is too large for your bedroom, a portable play yard that meets Consumer Product Safety Commission standards works as a temporary step before moving to the nursery crib.
When Sleep Gets Rough
Expect a few bumpy nights. Your baby has spent their entire sleep life in a responsive, rocking bassinet, and a crib is comparatively boring. Some common setbacks and how to handle them:
If your baby struggles to fall asleep in the crib but was doing fine in Weaning Mode, the issue is usually the new environment rather than the lack of motion. Spending time in the crib during awake, happy moments (supervised play, diaper changes nearby) can help it feel familiar before sleep enters the picture.
If your baby was sleeping through the night in the SNOO but starts waking again, give it three to five nights before changing your approach. Many babies self-correct once the novelty wears off. You can return to the SNOO temporarily if things go off the rails, but try not to bounce back and forth repeatedly, as that can make the adjustment longer overall.
If you’re in the middle of a growth spurt or your baby is teething, consider pausing the transition. Adding a sleep environment change on top of physical discomfort makes both harder. Wait for a calm stretch and restart where you left off.