Baby Sleep Schedule by Age: The Complete 0–12 Month Guide for 2026

Baby Sleep Schedule by Age: The Complete 0–12 Month Guide for 2026

If there's one thing that unites every new parent on the planet, it's the question: how much should my baby be sleeping right now? You search it at 2 a.m., you whisper it to your paediatrician, you compare notes with the other bleary-eyed parents at the park. And every time, you get a slightly different answer.

That's because baby sleep is not a fixed programme. It's a moving target — one that shifts every few weeks as your infant's brain matures, their circadian rhythm develops, and their caloric needs change. The AAP recommends 12–16 hours of total sleep per day for infants aged 4–12 months, but that range is wide enough to drive any parent mad.

This guide breaks it down month by month. We'll cover what the science says, what the averages actually look like, and — crucially — what realistic expectations are for each stage. No mythical "12 hours by 12 weeks" promises. Just evidence-backed guidance you can actually use.

How Baby Sleep Works: The Two-System Model

Before diving into schedules, it helps to understand why your baby sleeps the way they do. Infant sleep is governed by two biological systems:

1. Homeostatic sleep pressure — the buildup of adenosine (a neurotransmitter) in the brain during wakefulness. The longer your baby is awake, the stronger the drive to sleep. This is what "wake windows" are based on.

2. The circadian rhythm — your baby's internal clock, which regulates sleep-wake cycles based on light exposure and daily routines. Newborns don't have a functioning circadian rhythm. It begins to develop around 6–12 weeks and matures significantly by 4–6 months, when melatonin production kicks in.

When these two systems are aligned — enough sleep pressure has built up and the circadian clock says it's time to sleep — your baby falls asleep easily and stays asleep longer. When they're misaligned, you get bedtime battles, false starts, and 4 a.m. parties.

A 2024 scoping review published in the European Journal of Pediatrics confirmed that light exposure plays a critical role in circadian rhythm establishment during infancy, emphasising that consistent daytime light and dim evenings help anchor your baby's internal clock.

Month-by-Month Baby Sleep Schedule

Newborn: 0–6 Weeks

What to expect: Chaos. Beautiful, exhausting chaos. Your newborn has no day-night differentiation yet. Sleep comes in short bursts driven entirely by hunger and fatigue. About 50% of their sleep is active (REM) sleep, which means twitching, grunting, and frequent waking.

What to do: Don't try to impose a schedule. Focus on feeding on demand, keeping days bright and nights dark, and surviving. If your baby falls asleep after 35 minutes of awake time, that's fine. Some newborns can only handle 20 minutes before they need to sleep again.

2–3 Months

What to expect: Early circadian patterns begin to emerge. You may notice your baby starting to differentiate day from night — sleeping slightly longer stretches at night and being more alert during the day. This is the first glimpse of order in the chaos.

What to do: Start anchoring a consistent morning wake time and introduce a simple bedtime routine (bath, feed, dim lights). These cues help your baby's developing circadian system learn when nighttime is. The Betteroo State of Baby Sleep 2026 report found that babies with consistent bedtime routines by 8 weeks showed earlier consolidation of nighttime sleep.

3–4 Months: The Big Shift

What to expect: This is the most significant biological shift in your baby's first year. Sleep cycles mature from the newborn two-stage pattern (active and quiet) into the adult-like architecture of three distinct non-REM stages plus REM. Sleep cycles lengthen to 50–60 minutes.

This is widely known as the "4-month sleep regression" — though calling it a regression is misleading. It's a permanent maturation. Your baby is now fully cycling through lighter sleep stages, which means they may wake more often between cycles. If they relied on being fed or rocked to sleep, they'll look for those same conditions when they surface between cycles.

What to do: Consistency is your friend. Maintain your bedtime routine. If you're comfortable with it, this is the earliest window where gentle sleep shaping (putting baby down drowsy but awake) can begin. Many paediatric sleep specialists — including Dr. Marisa Quattrone at Blueberry Pediatrics — recommend starting to create independent sleep associations around this age.

4–6 Months: Finding a Rhythm

What to expect: This is often the sweet spot. The circadian rhythm is established, melatonin production is consistent, and many babies settle into a recognisable 3-nap pattern. Nighttime sleep stretches lengthen — some babies manage 6–8 hours continuously, particularly formula-fed babies.

However, "sleeping through the night" in paediatric research means a 5–6 hour stretch — not the 12-hour marathon parents imagine. And breastfed babies may still need one or two night feeds. Both are normal.

What to do: Protect the nap schedule. Three naps with gradually increasing wake windows (shorter in the morning, longer before bed) works best for most babies. Introduce solids around 6 months as recommended, but don't expect them to magically extend nighttime sleep — the evidence doesn't support that myth.

6–9 Months: Mobility and Separation

What to expect: Your baby is learning to roll, sit, crawl, and possibly pull to stand. Their brain literally practises these skills during sleep, which can increase night waking. At the same time, object permanence develops around 8 months — your baby now understands you exist even when you leave the room, and they're not happy about it.

The Betteroo 2026 survey of over 32,000 parents found that the most frequent night waking occurred between 7 and 9 months — not during the commonly discussed 4-month regression. This period is a convergence of motor development, separation anxiety, the 3-to-2 nap transition, and — for many families — the introduction of solid foods.

What to do: Most babies drop the third nap somewhere between 6 and 8 months. Signs of readiness include: fighting the third nap, bedtime resistance, or split nights (long wakeful periods in the middle of the night). When the third nap drops, temporarily move bedtime 30 minutes earlier to bridge the gap.

9–12 Months: Predictability (Finally)

What to expect: By now, most babies are solidly on a 2-nap schedule with predictable timing. The morning nap typically happens around 9:00–10:00 AM and lasts 30–60 minutes. The afternoon nap around 1:00–2:00 PM lasts 1–2 hours. Bedtime falls between 6:30 and 7:30 PM for most families.

That said, rapid cognitive growth (cruising, first words, pointing) and teething can still cause temporary disruptions. The 12-month regression is less about biology and more about developmental excitement — your baby may protest naps because crawling is just too much fun.

What to do: Protect the 2-nap schedule. Some parents think their 10-month-old is ready for one nap because they occasionally skip the morning nap. In almost all cases, they're not — the transition to one nap typically happens between 13 and 18 months. Dropping too early leads to overtiredness and worse night sleep.

Quick-Reference Sleep Schedule Chart

What the Numbers Don't Tell You

Sleep varies massively across cultures

A multinational study by Mindell et al. comparing sleep patterns across 17 countries found that babies in predominantly Asian countries (including Hong Kong, Singapore, and Japan) averaged 8.7 to 9.2 hours of nighttime sleep at 6 months — significantly less than the 10.5–11.2 hours seen in the UK and Australia. Later bedtimes (9–10 PM is common in Hong Kong), different nap structures, and co-sleeping all contribute. Developmental outcomes in these populations are not worse.

The takeaway: your family's schedule matters more than hitting a universal target. If your 8-month-old sleeps 9 hours at night with a 9:30 PM bedtime and two solid naps, and they're growing well and meeting milestones — that's a perfectly healthy pattern.

Sleep charts are averages, not prescriptions

The recommended ranges from the AAP and the American Academy of Sleep Medicine (AASM) are based on population data. Roughly half of healthy babies sleep less than the average, and half sleep more. A large Australian study published in Pediatrics found the average nighttime sleep for 6-to-12-month-olds was 11 hours — not the 12 that gets cited everywhere.

A 2025 study in Pediatric Research using the novel NAPPA wearable found that parents significantly underestimate short nighttime arousals and overestimate longer ones — suggesting that what parents perceive as "bad sleep" may not match what's actually happening biologically. Tracking objective patterns (rather than relying on exhausted middle-of-the-night impressions) gives a more accurate picture.

Building a Schedule That Works

Rather than rigidly following a chart, use these principles:

• Anchor the morning. A consistent wake time (within 30 minutes) is the single most powerful tool for stabilising your baby's circadian rhythm.
• Watch wake windows, not just the clock. Use age-appropriate wake windows as a starting point, then adjust based on your baby's cues (eye rubbing, yawning, turning away from stimulation).
• Protect bedtime. From 4 months onward, bedtime should be relatively consistent (6:30–8:00 PM for most families). The circadian "wake maintenance zone" at the end of the day makes it hard to push bedtime much earlier or later than your baby's biology dictates.
• Don't cap naps unless you need to. The "sleep breeds sleep" myth has limits, but most babies under 9 months benefit from getting as much daytime sleep as they can. The exception: if a late afternoon nap consistently pushes bedtime past 8:00 PM, it's time to cap or drop it.
• Track patterns over days, not hours. One bad night means nothing. A week of bad nights is a pattern worth investigating. Tools like sleep.commmonn.com help you see the bigger picture rather than fixating on individual nights.

Frequently Asked Questions

How do I know if my baby is getting enough sleep?

Forget the exact hours and focus on function. Is your baby alert and engaged during wake windows? Are they feeding well? Meeting developmental milestones? Growing appropriately? If yes, they're getting enough sleep — even if the number doesn't match the chart.

When will my baby sleep through the night?

"Sleeping through the night" in research terms means a 5–6 hour stretch — which many babies achieve between 4 and 6 months. But 12 uninterrupted hours? That's much more variable. A Norwegian study in BMJ Open found that 70% of 6-month-olds still woke at least once per night. By 12 months, more than half were still waking. This is biologically normal.

Is it normal for my 8-month-old to suddenly sleep worse?

Yes. The 7–9 month period is the statistical peak of night waking in the first year. Motor milestones, separation anxiety, and the 3-to-2 nap transition all converge. It typically passes within 2–6 weeks. Maintain your routine and resist introducing new sleep associations (like bringing baby into your bed) unless that's a deliberate long-term choice.

Should I wake my baby from naps?

Generally, let sleeping babies sleep — with two exceptions. First, if a nap threatens bedtime (e.g., the last nap ends past 5:00 PM and bedtime is 7:00 PM). Second, if morning naps consistently exceed 90 minutes and are stealing from the more restorative afternoon nap.

For more on navigating the myths around baby sleep, read 5 Baby Sleep Myths That Are Stressing You Out. If you're struggling with wake windows, our wake windows by age guide breaks down the science. And for families dealing with disrupted schedules during travel, check out our travel sleep guide.

Ready to build a personalised schedule? Try our sleep schedule generator — it adapts to your baby's age and your family's rhythm.