How much sleep does a 15-month-old need?

The AAP and CDC guide is 11–14 hours across 24 hours for ages 1–2, with the National Sleep Foundation in the same range. At 15 months: about 10–12 hours at night plus one nap of 1–1.5 hours.

What wake window does a 15-month-old need?

4–5 hours before the nap and about 5.5 hours before bed. The stretch before bed should be the longest of the day — if it is not, the nap probably ran too long or started too late.

Why is my 15-month-old suddenly fighting the nap?

Usually separation anxiety, or a wake window that is too short. If they are not tired enough, move nap time 15–20 minutes later for a week; if they are melting down before it, start earlier. Keep the routine the same either way.

Is there a sleep regression coming for a 15-month-old?

The 12-month regression window can run to 15 months; after that, the next classic window is the 18-month sleep regression. Both bring night wakes, short naps and clinginess, and both usually pass in a few weeks.

Monthly schedule · 15 months

15-Month-Old Sleep Schedule

Here is a realistic day for a 15-month-old: wake up around 7:00 AM, one nap at 12:00 PM, then bedtime around 7:00 PM. Wake windows run 4 to 6 hours, and total sleep lands near 11 to 14 hours. Shift any time 15 to 30 minutes to fit your family, consistency beats the exact minute.

Not medical advice. Typical ranges, not targets — ask your pediatrician about your child.

A sample day for a 15-month-old

Wake up

7:00 AM

Nap

5 hours awake

12:00 – 1:30 PM

Bedtime

5.5 hours after the nap

7:00 – 7:30 PM

Wake windows: 4 – 6 hours

1 nap

11 – 14 hours (10 – 12 at night + 1 nap)

What’s changing at 15 months

The one-nap rhythm settles this month. Separation anxiety often peaks around 15 months, so nap-time clinginess can spike even when the timing is right. Keep the nap routine identical — same room, same song, same order.

Frequently asked questions

How much sleep does a 15-month-old need?: The AAP and CDC guide is 11–14 hours across 24 hours for ages 1–2, with the National Sleep Foundation in the same range. At 15 months: about 10–12 hours at night plus one nap of 1–1.5 hours.
What wake window does a 15-month-old need?: 4–5 hours before the nap and about 5.5 hours before bed. The stretch before bed should be the longest of the day — if it is not, the nap probably ran too long or started too late.
Why is my 15-month-old suddenly fighting the nap?: Usually separation anxiety, or a wake window that is too short. If they are not tired enough, move nap time 15–20 minutes later for a week; if they are melting down before it, start earlier. Keep the routine the same either way.
Is there a sleep regression coming for a 15-month-old?: The 12-month regression window can run to 15 months; after that, the next classic window is the 18-month sleep regression. Both bring night wakes, short naps and clinginess, and both usually pass in a few weeks.

Sources: American Academy of Pediatrics (AAP) and CDC sleep guidance for toddlers, plus National Sleep Foundation (NSF) ranges for children aged 1–3. Not medical advice — these are typical ranges, not targets. If you have questions about your child’s sleep or development, ask your pediatrician.