How much sleep does a 9-month-old need?

Between 12 and 15 hours in 24 hours. Most 9-month-olds sleep 10–12 hours at night and take two naps totalling 2–3.5 hours during the day. Some babies sleep at the lower end of this range and are thriving — total sleep needs vary significantly between individuals.

Is there a 9-month sleep regression?

Yes — it typically spans 8–10 months and is one of the most disruptive in the first year. It is driven by a combination of gross motor development (crawling, pulling to stand) and a cognitive leap around object permanence and separation awareness. A baby who was sleeping well at 6–7 months and is suddenly waking multiple times is almost certainly in this regression. It usually resolves within 2–6 weeks with consistent routine maintenance.

How many naps should a 9-month-old have?

Two. The transition from 3 naps to 2 typically completes between 6 and 9 months. A 9-month-old still on 3 naps may be ready to consolidate — signs include the third nap becoming difficult or bedtime resistance increasing. A 9-month-old fighting both naps may have wake windows that are too short — try extending by 15–20 minutes before reducing nap count.

What wake windows should a 9-month-old have?

Between 2.5 and 3.5 hours. A baby waking at 6:30am should have their first nap no earlier than 9:00–9:15am. The afternoon wake window (from end of nap 2 to bedtime) is typically the longest — 3–3.5 hours is common. If bedtime resistance is high, extending the afternoon wake window by 15–20 minutes is usually the first adjustment to make.

My 9-month-old stands up in the cot and will not lie down. What do I do?

This is extremely common when a baby is newly pulling to stand. The motor circuit is dominant — they do it automatically, even when overtired. Practise lowering from standing to seated on the floor during the day until it is smooth and automatic. At night, go in briefly, lower them to lying, say the goodbye phrase, and leave. Do not lift them out of the cot. Within a week of the skill being mastered during the day, the overnight version resolves.

Should a 9-month-old still be night feeding?

It depends on the baby and feeding method. Breastfed babies at 9 months may still have one genuine night feed, typically in the early morning hours. Formula-fed babies can usually go the full night without a feed by this age. If a baby is waking 3 or more times and feeding each time, the feeds are likely habitual rather than nutritional — a brief, boring response that does not include feeding is usually enough to extinguish the pattern within 3–5 nights.

My 9-month-old's naps are suddenly short again. What is causing it?

Short naps at 9 months are usually caused by one of three things: wake windows that are too short (baby is not tired enough), the regression causing brief arousal between sleep cycles, or a nap schedule that has drifted after the 3-to-2 transition. Start by checking wake windows — a first nap starting before 2.5 hours of wake time is the most common culprit. If wake windows are appropriate, the regression is the likely cause and will resolve within a few weeks.

8–10 months

9 months

Q: My 9-month-old was sleeping through and is now waking every 2 hours. What happened?

This is the hallmark of the 8–10 month regression. The brain is consolidating major motor milestones (crawling, pulling to stand) during sleep, which causes frequent arousal between sleep cycles. The baby surfaces, cannot resettle independently, and calls out. The most effective response is a brief, consistent return — the goodbye phrase once — without feeding or extended settling. Feeding to sleep at this stage typically extends the waking pattern rather than resolving it.

How much sleep, how many naps, what bedtime — and what's normal at this stage.

Total sleep

12–15 hrs

Night sleep

10–12 hrs

Naps

2 naps · 2–3.5 hrs

Bedtime

18:00–19:30

Sample 9 months schedule

Time	Activity
06:30	Wake + feed
09:00	Nap 1 (1–1.5 hrs)
10:30	Wake + feed
13:30	Nap 2 (1–1.5 hrs)
15:00	Wake + feed
18:30	Bedtime routine starts
19:00	Asleep

All times are approximate. Adjust by 30–60 minutes to suit your child.

What's normal at 9 months

•Two naps daily — morning and afternoon
•Wake windows of 2.5–3.5 hours between sleep periods
•Night waking may increase during the 8–10 month regression
•Separation anxiety peaks — settling independently becomes harder
•Pulling to stand and crawling disrupts sleep as the brain practises motor skills overnight
•One night feed may still be developmentally appropriate

What changed since 6–7 months

•Wake windows have lengthened significantly — from 2–2.5 hours to 2.5–3.5 hours
•The third catnap has dropped — the baby is now on a reliable 2-nap schedule
•Gross motor development (crawling, pulling to stand) is actively practised during light sleep phases, causing night waking
•Object permanence is fully established — the baby knows you exist when out of sight and can become distressed by your absence
•Solid food intake is increasing, but night feeds may still be genuine for some babies

What's coming next

The transition from 2 naps to 1 nap begins for most children between 13 and 18 months. Early signs: nap 1 or nap 2 is consistently refused, bedtime resistance increases, or the baby starts waking overnight after previously sleeping through.

8–10 month sleep regression

Typically 8–10 months

The 8–10 month regression is one of the most significant in the first year. It is driven by a combination of gross motor development (the brain actively consolidates crawling, pulling to stand, and cruising during sleep, causing frequent arousal) and the cognitive leap around object permanence and stranger awareness. Separation anxiety peaks at this age as the baby fully understands that people exist when out of sight — and can become distressed by that awareness at bedtime and overnight.

Full guide: 8–10 month sleep regression →Full reset guide →

Common challenges at 9 months

Sudden night waking after sleeping through

A baby who was sleeping through at 6–7 months and is now waking multiple times at 9 months is almost certainly in the 8–10 month regression. The waking is often brief — the baby surfaces between sleep cycles, cannot resettle independently, and calls out. The pattern resolves within 2–6 weeks with consistent response. Reverting to previous settling habits (feeding to sleep, rocking) during the regression typically extends it.

Separation anxiety at bedtime

At 9 months, the baby understands that you leave when you put them down — and they have the motor ability and vocal capacity to protest. A consistent bedtime routine ending with the same phrase every night gives the baby a predictable signal that the interaction is ending. The goodbye phrase works as an anchor — the baby learns to associate it with sleep rather than with loss.

Standing in the cot and unable to get down

A baby who has just learned to pull to stand will do it compulsively — including in the cot at 2am. Unable to lower themselves safely, they become distressed. The short-term fix is practising lowering to seated during the day until it is automatic. The overnight approach is the same as any waking: brief, calm, consistent response. Do not lift the baby out — lower them to lying, say the phrase, leave.

Nap schedule disruption

At 9 months, wake windows are often still being calibrated after the 3-to-2 nap transition. If nap 1 is too early or too late, nap 2 compresses or fights back. The target is a first nap no earlier than 2.5 hours after wake-up. If the baby is waking at 6:30am, the first nap should not start before 9am. An undertimed wake window is the most common cause of short or refused naps at this age.

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Related guides

Questions about 9 months sleep

Methodology grounded in paediatric sleep research and evidence-based clinical practice. Schedule data, wake window recommendations, and regression timelines are derived from published guidelines including those of the American Academy of Sleep Medicine (AASM), the National Sleep Foundation, and paediatric sleep research published in peer-reviewed journals.

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