Baby Sleep Patterns by Age: What to Expect in the First Year

Baby sleep patterns can change considerably during the first year. A newborn may sleep in short stretches scattered across the day and night, while an older baby may gradually develop longer periods of night-time sleep and more predictable naps. There is no single timetable that every baby follows.

If your baby’s sleep looks different from another baby’s at the same age, that does not automatically mean something is wrong. The NHS emphasises that some babies need more sleep and some need less. Sleep patterns also change as babies grow, so a routine that seems settled one month may look quite different the next.

Understanding the broad changes you might see can make those shifts a little less confusing.

How baby sleep changes during the first year

In the early months, sleep is spread across the whole 24-hour period rather than neatly divided into daytime naps and a long night’s sleep. Newborns wake frequently, including because they need to feed.

Over time, many babies begin sleeping for longer stretches. Their daytime and night-time patterns may become easier to recognise, although night waking can continue throughout the first year.

The American Academy of Pediatrics notes that babies do not have regular sleep cycles until around 4 months of age. This is one reason it can be unrealistic to expect a very young baby to follow the kind of predictable schedule an older baby might manage.

Rather than looking for a precise number of hours at a precise time, it can be more useful to think about how sleep gradually develops across broader age ranges.

Newborn sleep patterns: birth to 3 months

Newborn sleep can feel wonderfully peaceful one moment and completely unpredictable the next.

According to the NHS, newborn babies are generally asleep more than they are awake. Some may sleep for around 8 hours in total across a day, while others may sleep for as much as around 18 hours. That sleep can happen in short or longer bursts rather than in one continuous stretch.

At this stage, waking during the night is expected. Newborn babies have small stomachs and need to feed regularly, so sleeping through the night is unlikely.

You may notice that your newborn:

sleeps at various times throughout the day and night
wakes regularly for feeds
has no obvious bedtime yet
sometimes sleeps for a short period and sometimes much longer
falls asleep while being held but wakes after being placed in their cot or Moses basket

The NHS notes that it is very common in the early weeks for newborns to fall asleep while being held and then wake when placed down. Parents do not need to feel pressured to establish a perfect sleep routine immediately.

At this age, focus on responding to your baby’s needs and maintaining a safer sleep environment rather than trying to create a strict schedule.

Baby sleep patterns at 3 to 6 months

Between 3 and 6 months, you may start noticing more distinction between daytime and night-time sleep.

The NHS says babies at this stage need fewer night feeds and some may sleep for 8 hours or longer at night. That does not mean every baby will. Regular waking can still be part of normal baby sleep.

Around this period, sleep cycles are also becoming more organised. The American Academy of Pediatrics states that regular sleep cycles develop at around 4 months, although individual babies develop at different rates.

You might begin to see:

longer stretches of sleep at night
clearer periods of daytime wakefulness
naps becoming easier to identify
a more recognisable bedtime
changes in how easily your baby settles

This can also be a period when parents feel that sleep has suddenly become less predictable again. Development is not always a smooth progression towards longer nights. A baby who previously slept for a long stretch may begin waking more frequently for a while.

Try to view these patterns over time rather than judging sleep based on one difficult night or week.

Baby sleep patterns at 6 to 9 months

By around 6 months, some babies are capable of much longer stretches of night-time sleep. NHS guidance says babies around 6 months may sleep for up to 12 hours at night.

Again, this is a possibility rather than a milestone your baby must meet.

During this stage, you may find that daytime naps and night sleep feel more distinct than they did during the newborn months. Your baby may also stay awake for longer periods between sleeps as they become increasingly interested in the world around them.

Sleep can still be disrupted. The NHS highlights teething discomfort and hunger as possible reasons babies between 6 and 12 months may wake during the night.

Developmental changes can also make family routines feel different. Your baby may be learning to roll, sit, crawl or interact in new ways. Avoid assuming that every change in sleep has one particular cause. Babies can wake for many reasons, and sometimes there is no obvious explanation.

Baby sleep patterns at 9 to 12 months

Towards the end of the first year, your baby’s sleep may look much more organised than it did during those early newborn weeks. Night-time sleep may be longer and daytime sleep may fall into recognisable naps.

That does not necessarily mean uninterrupted nights.

The Lullaby Trust notes that some babies between 6 months and 1 year sleep for up to 12 hours at night, while others continue waking. It also reports that around a third of babies have never slept all night by 12 months.

This is a useful reminder when it seems as though every other baby is supposedly sleeping from bedtime until morning.

At this age, you may notice:

a more familiar bedtime pattern
longer night-time sleep
established daytime naps
occasional periods of increased waking
sleep changing again as your baby approaches toddlerhood

The end of the first year is not a deadline for independent or uninterrupted sleep. Babies develop at different rates, and sleep is no exception.

What does “sleeping through the night” actually mean?

The phrase can be surprisingly unhelpful because different people use it to mean different things.

One parent may mean eight uninterrupted hours. Another may mean their baby sleeps from a late feed until early morning. Someone else may describe a baby as sleeping through even though they briefly wake and settle again.

Rather than using another family’s definition as a benchmark, look at your baby’s overall sleep and wellbeing.

Night waking is particularly normal in younger babies. Even later in the first year, some babies continue to wake while others sleep for long stretches.

This variation is one reason comparisons between babies can create unnecessary worry.

Why your baby’s sleep pattern may suddenly change

Baby sleep is rarely a straight line from frequent waking to uninterrupted nights.

You may have several relatively predictable weeks followed by a period when your baby wakes more often, naps differently or takes longer to settle.

Possible reasons for changes include hunger, teething discomfort, illness, changes to the baby’s environment and normal development. Sometimes the reason will not be obvious.

A change does not necessarily mean you have done something wrong or that you need to completely redesign your routine.

If your baby otherwise seems well, you can observe what happens over the following days while continuing to respond to their needs. If the change concerns you, particularly if it appears alongside symptoms of illness or feeding difficulties, speak to a health professional.

Should you put your baby on a sleep schedule?

A strict clock-based schedule is not necessary for every family, particularly during the newborn stage when babies need to wake regularly for feeds.

As your baby grows, you may naturally begin noticing patterns in when they become sleepy, wake, feed and nap. A simple bedtime routine can eventually provide familiar cues that sleep is approaching.

The NHS suggests a calming bedtime routine can be helpful and gives examples such as a bath, changing into night clothes, dimming the lights, reading a story, having a cuddle or singing a lullaby.

You do not need an elaborate routine. Something simple that works consistently for your household is enough.

It is also worth remembering that a routine is different from expecting your baby to sleep at exactly the same times every day. Babies are not clocks. Some days will look different from others.

Keep safer sleep guidance consistent at every age

Although sleep patterns change during the first year, safer sleep guidance remains important.

The Lullaby Trust recommends placing babies on their backs for every sleep, day and night. A baby should have their own clear, flat, separate sleep space with a firm, flat mattress, and their cot should be kept clear of unnecessary items.

The Lullaby Trust also recommends that babies sleep in the same room as their parent or carer for at least the first 6 months, during daytime and night-time sleep.

Once a baby can independently move from their back to their front and back again, The Lullaby Trust says they can find their own sleeping position. Parents should still place them on their back at the beginning of every sleep.

Sleep deprivation can make tempting shortcuts feel appealing, especially after several difficult nights. Avoid products, positions or online “sleep hacks” that conflict with established safer sleep advice, even if they promise longer or deeper sleep.

How to cope when your baby’s sleep feels unpredictable

Knowing that disrupted sleep is common does not make being awake at 3am easy.

If you are exhausted, lower the expectations you place on yourself where you can. The NHS suggests resting or sleeping when your baby sleeps where possible, accepting help from friends and family and letting non-essential household jobs wait.

It can also help to share overnight responsibilities with a partner or another trusted adult when your circumstances allow.

Most importantly, avoid comparing your nights too closely with what other parents report. Two healthy babies of the same age can have noticeably different sleep patterns.

Social media can make it seem as though there is a particular month when babies are supposed to start sleeping perfectly. Real baby sleep tends to be much less tidy.

When to get professional advice

Speak to your health visitor, GP or another qualified healthcare professional if you are worried about your baby’s sleep, particularly if there has been an unexplained change alongside signs that your baby is unwell, is having difficulty feeding or is otherwise behaving unusually.

You should also ask for professional advice if you have questions about sleep that relate to a medical condition, reflux, premature birth or another individual health concern. General sleep guidance cannot account for every baby’s medical needs.

If exhaustion is becoming difficult to manage, tell someone. Your health visitor or GP can help you work through your concerns and point you towards appropriate support.

For questions specifically about safer sleep, use current NHS and Lullaby Trust guidance rather than relying on sleep advice circulating on social media.

Your baby’s first year will probably contain plenty of changes, including changes to sleep. The useful benchmark is not whether their routine looks exactly like somebody else’s. It is whether their individual needs are being met while you continue to follow safer sleep guidance.