15-18 month sleep routine: naps, schedules
and what to expect

Sleeping four month old baby lying on their back

If your toddler was coping well with sleep and has suddenly started refusing naps, fighting bedtime, or waking more overnight, you are not imagining it. The 15 to 18 month sleep regression is one of the most talked-about stages in toddlerhood, and for good reason.

Between fifteen and eighteen months, toddlers go through a period of rapid emotional, physical, and neurological development. Sleep needs are shifting, the nap transition is either underway or just completed, and separation anxiety often peaks again right in the middle of it all.

This stage is hard. It is also completely normal, and with the right routine support, sleep does settle again.

What does sleep look like between 15 and 18 months?

At this age, most toddlers are either in the final stages of moving from two naps to one, or already settled on one nap. Some children, particularly closer to fifteen months, still cope well with two naps. Others clearly cannot fit two sleeps into the day without it pushing bedtime late or disrupting overnight sleep.

Sleep can feel inconsistent during this window, especially when your toddler is straddling nap structures. Nap resistance, boundary testing at bedtime, and overnight waking are all common, and they are usually linked to emotional development rather than a sleep problem.

How much sleep does a 15 to 18 month old need?

Most toddlers in this age bracket need around 11 to 14 hours of total sleep across a twenty-four hour period. This includes their daytime sleep and consolidated overnight sleep.

Day sleep may look like two shorter naps for some children early in this stage, or one longer nap once the transition is complete. There is a wide range of normal here, and sleep needs can vary significantly from one child to the next.

Even at this older age, ensuring a clear and safe sleep environment aligned with general health principles from Red Nose Australia, the Lullaby Trust (UK), and the AAP (American Academy of Pediatrics) helps prevent overnight safety issues as your toddler becomes more mobile and climbs.

How many naps at 15 to 18 months?

This age range is where most children complete the transition from two naps to one. While some children have already made the move before fifteen months, others take a little longer to adjust.

Signs your toddler may be ready to drop to one nap include consistently refusing one of their naps, managing longer awake periods comfortably, taking one longer nap when given the opportunity, or bedtime becoming very late or very difficult on two naps.

Once these signs appear consistently over a few weeks, moving to one nap usually improves both day sleep and nights fairly quickly.

Consistently refusing one nap
Managing long awake periods comfortably
Taking one longer nap
Bedtime becoming very late or difficult on two naps

Once these signs are consistent over a few weeks, moving to one nap usually improves both day sleep and nights.

What can a 15-18 month day look like?

Because this stage overlaps with the final nap transition, routines can vary depending on where your toddler is at.

Two-nap routines

Some toddlers still cope best with two naps early in this stage.

Medium / medium example

Or even the below if they are very close to their transition

One-nap routine (most common by 15-18 months)

Many toddlers are well and truly ready for one nap during this window. A typical routine looks like:

Some toddlers may cope better with a slightly earlier bedtime initially while adjusting to longer awake periods.

These routines are examples only and should be used as guides rather than strict schedules. Readiness for one nap is based on consistent patterns over time, not a few difficult days.

Common sleep challenges at 15- 18 months

Sleep challenges during this stage often include nap refusal, early rising, overnight waking, and bedtime battles. These are commonly linked to:

Developmental leaps
Separation anxiety
Changing sleep pressure
Nap transitions

Sleep is rarely “broken” at this age - it is usually evolving.

Supporting sleep between 15-18 months

Keep routines predictable and consistent
Hold clear boundaries around sleep while offering reassurance
Expect resistance during transitions and developmental phases
Avoid switching between nap structures too frequently
Make changes gradually and give them time to settle

Consistency and confidence are key during this stage.

Need help with your toddler's sleep schedule?

If you are not sure whether your toddler's routine is right for this stage, or sleep is starting to feel really hard, the team is here to help.

Based in Melbourne, Australia and supporting families Australia-wide, the team offers:

30-minute sleep consultation - a focused session where we look at your baby's routine, naps, feeds, awake windows, and overnight waking, then give you clear, practical next steps tailored to your family.

Two Week Sleep Support - a fully guided two-week program that includes a personalised sleep plan, a 60-minute consultation, and 14 days of weekday support while you make changes. Ideal if sleep feels really unsustainable and you want more hands-on help.

In-home sleep support - hands-on, face-to-face support for families in Melbourne and surrounding areas who want someone there with them through the process.

Sleepy Little Bubs is based in Melbourne and offers virtual sleep consultations across Australia and worldwide, with in-home sleep support available in Melbourne and surrounding areas.

Whether you need quick clarity or more structured support, we can help you find the right next step.