The Complete Baby Sleep Guide — Birth to 5 Years

Sleep needs change substantially across the first five years. Newborns (0–3 months) typically sleep 14–17 hours across 24 hours in short stretches. Babies 4–11 months need roughly 12–16 hours including naps. Toddlers 1–2 years need about 11–14 hours. Children 3–4 years typically need 10–13 hours, with the nap gradually shortening and then dropping altogether somewhere between ages 3 and 5. These ranges match the World Health Organization's 2019 Guidelines on Physical Activity, Sedentary Behaviour and Sleep for Children Under 5, as well as American Academy of Sleep Medicine and NHS guidance — every child develops at their own pace, and a child who is happy, growing well, and alert during the day is very likely getting enough sleep even if the number doesn't match the average exactly.

Most babies don't have a predictable circadian rhythm until around 6 to 8 weeks, so a rigid schedule before then usually isn't realistic or necessary. From around 3 to 4 months, many families can start building loose, wake-window-based routines rather than clock-based schedules. A true clock-based schedule tends to become more workable from around 4 to 6 months onward, once naps begin to consolidate into predictable blocks.

The American Academy of Pediatrics recommends babies sleep alone, on their back, in a crib or bassinet with a firm, flat surface and no loose bedding, pillows, bumpers, or soft toys. Room-sharing without bed-sharing is recommended for at least the first 6 months, ideally the first year, as it's associated with a reduced risk of sudden infant death syndrome (SIDS). Keeping the room smoke-free, avoiding overheating, and offering a pacifier at sleep times are also associated with reduced SIDS risk. These guidelines apply to every sleep, including naps.

Frequent night waking in the first few months is typical and usually reflects a small stomach that needs regular feeds, sleep cycles that are shorter than an adult's (roughly 45–60 minutes), and a circadian rhythm that hasn't matured yet. Most babies gradually consolidate sleep into longer stretches between 3 and 6 months. If waking is very frequent well past 6 months alongside other symptoms like loud snoring or difficulty settling despite a consistent routine, mention it to your pediatrician.

The 4-month sleep regression reflects a genuine, permanent change in how your baby sleeps: their sleep cycles mature from a simple two-stage pattern into an adult-like cycle with more transitions between light and deep sleep. Because babies briefly stir at each cycle transition, this can mean more night waking for a period while they learn to link cycles back together. Unlike some other "regressions," this one doesn't reverse — it's a developmental milestone. A consistent, calm bedtime routine often helps sleep smooth out again over a few weeks.

Nap transitions follow a fairly predictable order, though timing varies by child. Most babies drop from 4 naps to 3 around 5–6 months, from 3 naps to 2 around 7–9 months, and from 2 naps to 1 nap somewhere between 14 and 18 months, with 15 months being a common average. The single afternoon nap is often the longest-lasting sleep habit of early childhood, frequently continuing until age 3 to 5.

Most children drop their last daytime nap somewhere between ages 3 and 5, with the average landing around 3.5 years, though the range is wide and normal. Signs a child may be ready to drop the nap include consistently taking 45–60+ minutes to fall asleep for the nap, the nap pushing bedtime unreasonably late, or the nap no longer improving afternoon mood. A gradual approach — such as offering quiet independent rest time instead of an outright nap on days a child resists — tends to work better than an abrupt switch.

Nightmares happen during lighter REM sleep, usually in the second half of the night, and the child typically wakes up frightened, remembers the dream, and can be comforted. Night terrors happen during deep non-REM sleep, usually in the first few hours of the night, and involve the child appearing distressed while still mostly asleep; they rarely remember it afterward and usually can't be woken or comforted in the moment. Night terrors look alarming but are generally considered a normal, if unsettling, part of preschool-age sleep architecture and are usually outgrown.

Early waking is often driven by an overtired bedtime, a room that's too light near dawn, or a bedtime that's actually too late — overtiredness can paradoxically produce earlier waking rather than later. Practical steps include using blackout blinds or curtains, checking that total daily sleep and nap timing aren't leaving the child overtired by bedtime, and keeping the wake-up time and morning light exposure consistent. Early waking often takes 1–2 weeks of consistent adjustments to shift.

Bedtime stalling — one more story, one more hug, a sudden need for water — is very common from around age 2 onward and reflects a mix of separation anxiety, a growing sense of independence, and a genuinely limited ability to self-soothe into sleep. A short, predictable, consistently-ordered bedtime routine reduces stalling because the steps are always the same, so there's less to argue about. Building one or two "extras" into the routine itself, rather than responding to open-ended requests, tends to reduce curtain calls over time.

The American Academy of Pediatrics recommends room-sharing without bed-sharing for at least the first 6 months and ideally the first year, as it is associated with a reduced risk of SIDS. Many families transition the baby to their own room somewhere between 6 and 12 months, often guided by the baby's sleep consolidation and the family's own preferences — there is no requirement to move at any specific point, and continuing to room-share longer is also fine.

A split night is a stretch of prolonged wakefulness in the middle of the night, most common in toddlers, where the child sleeps for a few hours, wakes fully, and stays awake for one or more hours before falling back asleep. It's often linked to an early or mistimed bedtime, an overly long or late afternoon nap, or a temporary disruption like travel or illness. Reviewing total daily sleep and nap timing, and gently shifting bedtime later or shortening the nap, often resolves split nights within a week or two.

Yes — sleep regularly gets temporarily bumpier around developmental leaps, nap transitions, teething, travel, illness, and schedule changes like starting nursery. These wobbles are a normal part of the overall trajectory rather than a sign that something has gone wrong. Returning to a consistent routine once the disruption passes is usually enough to bring sleep back on track within one to three weeks.

Worth raising with your pediatrician or health visitor: loud snoring, gasping, or pauses in breathing during sleep; extreme difficulty waking a child in the morning; a sleep problem that hasn't improved despite several weeks of a consistent, age-appropriate routine; excessive daytime sleepiness beyond what's typical for their age; or if managing sleep disruption is significantly affecting your own physical or mental health. These are general guidelines, not a diagnosis — your child's pediatrician can assess your child's specific situation.

A simple, consistent 20–30 minute sequence works well at almost any age: a bath or wash-up, a nappy or pajama change, a feed or milk if applicable, one or two books, dimmed lights with white noise on, and a consistent goodnight phrase before leaving the room. What matters most is that the order stays the same every night — predictability, not any specific activity, is what signals to a child's body that sleep is coming.

Lunara's sleep tracker logs naps, night sleep, and wake windows automatically, then surfaces patterns — like a nap running too long or a bedtime drifting later — that are genuinely difficult to spot from memory alone across weeks of broken sleep. Weekly AI summaries translate the raw log into plain-language suggestions, so you can see whether last week's schedule tweak actually helped before deciding what to try next. It's free to start.