Moving from bassinet to cot: when to transition and how to make it smooth

Moving your baby from a bassinet into a cot is one of those milestones that creeps up fast. One day they look tiny in there, and the next they are touching the sides, wriggling into the corners, or simply running out of room. It is a completely normal next step, but it often brings a lot of questions.

Will sleep get worse? Will they feel unsettled in a bigger space? What does safe sleep look like in a cot? This guide covers when to move baby into a cot, the signs to watch for, and simple ways to support a smooth transition with confidence.

When to move baby from bassinet to cot

There is no single perfect age, because bassinets vary in size and safety limits. The best guide is always your bassinet's manufacturer recommendations combined with your baby's own development. Many babies make the move somewhere between 3 and 6 months, but some outgrow a bassinet earlier, especially longer babies or those who are more active during sleep.

Always check:

The maximum weight limit for your specific bassinet
Any height or length guidance in the manufacturer instructions
Whether the bassinet is still considered safe once your baby is pushing up, attempting to roll, or shifting around more during sleep

If your baby is approaching the 4 month sleep regression, you may also notice them becoming more active in sleep and waking more easily around this time. That does not mean you need to delay the cot transition. It just means staying extra consistent with sleep cues and your settling approach while the change is happening.

Signs your baby is ready for the cot

Your baby is usually ready to move when you notice one or more of these:

They are regularly touching the sides or ends of the bassinet
They seem cramped and are waking more from bumping the sides
They are rolling, attempting to roll, or twisting during sleep
They are pushing up on their hands or knees
They have reached the weight limit for the bassinet
They are waking more frequently and struggling to resettle due to lack of space

Sometimes sleep changes at this stage are linked to catnapping or shifting sleep needs rather than the bassinet itself. But if your baby is clearly outgrowing the space, the move to a cot often helps because they have more room to move freely without waking themselves up.

Is it safe to move to a cot?

Yes, and for many babies a cot actually becomes the safer option once they are more active. A cot provides a firm, flat mattress, stable sides, and a long-term safe sleep setup that can take your baby well into toddlerhood.

What matters most is that the cot sleep space follows safe sleep guidelines supported by Red Nose Australia, the Lullaby Trust (UK), and the AAP:

Baby always placed on their back
Firm, flat mattress
Clear sleep space with no pillows, loose blankets, bumpers, or soft toys
A properly fitted sleep sack instead of loose bedding

For a full overview of what should and should not be in the cot, our safe sleep guidelines blog covers all the non-negotiables.

How to transition from bassinet to cot smoothly

Keep everything else the same

When you change where your baby sleeps, try not to change too many other things at the same time. Keep consistent:

The bedtime routine
The sleep sack
Your settling approach
Room temperature
White noise if you already use it

If you are also working through the swaddle transition, try to do one change at a time where possible, unless safety requires both to happen at once.

Start with naps, or go straight to nights

Both approaches can work. Some babies do well starting with naps in the cot for a few days, then moving nights across once they are comfortable in the new space. Other babies settle better going straight to nights in the cot, because sleep pressure is highest at bedtime and they are more likely to drift off without a fuss.

If naps are currently very short, it may help to work on catnapping first so day sleep is more settled before you add the cot transition on top.

Make the cot feel familiar

A cot can feel bigger and more open than a bassinet, which is why some babies take a few days to adjust. To help:

Use a fitted sheet that feels similar in texture to what they are used to
Keep the room environment consistent, same darkness, same sounds
Maintain the same sleep cues and wind down routine so your baby has familiar signals that sleep is coming

Common sleep changes after the move

It is normal for the first few days to include:

Shorter naps
A little more settling support than usual
More night waking while your baby adjusts to the new space

This does not mean the transition has failed. It means your baby is learning that this bigger space is safe and comfortable. Give it time.

If sleep disruption continues beyond two weeks, it is worth checking:

Whether awake windows need adjusting for your baby's age
Whether your baby is becoming under or overtired across the day
Whether the sleep environment is set up to support deeper sleep

What if your baby still sleeps in your room?

Many families move their baby into a cot but keep the cot in the parents' room for a while. That is a completely valid middle step if space allows. Room sharing with a cot can still work well and is something many Melbourne families do, particularly in the early months when overnight feeds are still frequent.

If you are unsure how to make room sharing work without it disrupting sleep, our room sharing blog has practical guidance on setting it up well.

When to move from cot to bed

This blog focuses on the bassinet to cot transition, but if you are already looking ahead, most toddlers are ready to move from a cot bed to a big bed somewhere between 2.5 and 3.5 years. There is rarely a need to rush it, and keeping your toddler in a cot for longer is usually the simpler option for sleep.

Looking ahead

The move from bassinet to cot is a healthy and normal step, and for many families it actually improves sleep because babies simply have more room to move and resettle comfortably.

If you want support that takes you beyond this transition, the Sleepy Little Bubs Infant Sleep Course (link to: Infant Sleep Course page) gives you clear routines, settling guidance, and troubleshooting help as sleep changes from the newborn stage right through infancy and toddlerhood. It also supports the bigger shifts that often happen around the 4 month sleep regression, nap transitions, and night waking.

Need help with the bassinet to cot transition?

If your baby's sleep has completely derailed since moving to the cot, or you are staring at a cramped bassinet feeling terrified that a bigger space will ruin their nights, a 30-minute sleep chat is the perfect next step.

We will get straight to the point and look at your baby's current routine, settling techniques, and cot environment to ensure a seamless transition. You will walk away with a clear, no-fuss plan to help your baby feel secure in their bigger bed, eliminate transition-related night wakes, and keep sleep on track.

This is ideal for exhausted mums who want fast, personalised expert reassurance and a clear plan of action without committing to a full sleep package.

Book a 30min Sleep Consultation

Eva Beke

Certified Paediatric Sleep Consultant

Founder The Sleepy Little Bubs

I’m Eva Beke, a certified baby and toddler sleep consultant and founder of The Sleepy Little Bubs, supporting families across Australia and the world with evidence based baby and toddler sleep support.

My approach is realistic, supportive, and designed to evolve as your child grows, so you’re not just getting help for today, but confidence moving forward.

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Supporting sleep doesn’t have to mean starting over every time something changes.

Our sleep courses are built to support you long term, with age specific guidance that adapts as your child grows. From early routines and regressions to nap transitions and toddler sleep challenges, you’ll have a clear plan and ongoing support so you can respond with confidence at every stage.