How to Help Your Baby Sleep Through the Night

6 min read

Quick answer: For babies, sleeping through the night usually means a 5–6 hour stretch, and most don't do it consistently until at least 6 months. Help it along with a predictable bedtime routine from around 6–8 weeks, putting your baby into the cot drowsy but awake, and safe sleep: on their back in a separate cot or Moses basket in your room for at least 6 months, at 16–20°C, on a firm, flat mattress with no loose bedding under 12 months.

What parents need to know

One of the most common questions new parents ask is: when will my baby sleep through the night? The honest answer is that it varies enormously — but there are proven strategies that can help nudge things in the right direction.

This guide covers what to realistically expect at each stage, how to build healthy sleep habits, and what "sleeping through" actually means for babies.

What does "sleeping through" actually mean?

First, a reality check: sleeping through the night for a baby typically means a stretch of 5–6 hours without waking, not 8–12 hours like an adult. Most babies don't consistently sleep through until at least 6 months, and many not until well into their first year — or beyond. This is completely normal.

Understanding sleep cycles

Babies have shorter sleep cycles than adults (around 45–50 minutes compared to 90 minutes) and they spend more time in light sleep. This means they wake more frequently and often need help settling back to sleep. As they mature, they gradually learn to link sleep cycles independently — which is what we call "sleeping through."

Building a bedtime routine

A consistent, calming bedtime routine is one of the most effective tools you have. It doesn't need to be complicated — just predictable. A good routine might look like:

Warm bath
Baby massage or lotion
Change into pyjamas or a sleep bag
Feed (breast or bottle)
Short, quiet wind-down (a story or gentle song)
Into the cot, drowsy but awake

The same sequence every night helps your baby's brain associate these cues with sleep. Most babies respond well to a routine from around 6–8 weeks.

Sleep associations: helpful vs. unhelpful

A sleep association is anything your baby uses to fall asleep. Some are fine, such as a dummy or white noise. If you use a comforter or soft toy, keep it out of the cot while your baby is under 12 months, as the NHS advises keeping the cot clear of soft toys. Others can become problematic if your baby can't replicate them when they wake in the night, like needing to be rocked or fed to sleep every time.

The goal over time is to help your baby fall asleep with associations they can access themselves — so when they surface between sleep cycles, they can resettle without your help.

Creating the right sleep environment

The NHS and Lullaby Trust both recommend:

Room temperature between 16–20°C
A firm, flat mattress with no pillows, duvets, cot bumpers, soft toys or loose bedding for babies under 12 months
Always put your baby on their back to sleep, in a separate cot or Moses basket in the same room as you for at least the first 6 months
A dark room (blackout blinds make a big difference, especially in summer)
White noise can help some babies — at a safe volume (no louder than 50dB)

A well-fitted baby sleeping bag is the safer choice, rather than swaddling or loose blankets. It stops your baby wriggling under their bedding and keeps them at a steady temperature. Make sure it fits well around the shoulders so your baby's head cannot slip down into the bag, and choose the right tog rating for the room temperature.

Age-by-age expectations

0–3 months

Newborns need feeding every 2–3 hours and this is completely normal. Their stomachs are tiny and their sleep is biologically designed to be light. Focus on feeding well, following safe sleep guidance, and survival mode for now.

3–6 months

Many babies start consolidating their longest sleep stretch in the early months. Some will sleep 4–6 hours by 3 months. You can start introducing a simple bedtime routine.

6–12 months

This is the most common window for sleep training if you choose to do it. For some babies at this age, night feeds may no longer be necessary, but not all babies are the same. Common approaches include gradual retreat, pick-up-put-down, and Ferber-style methods.

When to get help

Call 999 if your baby:

stops breathing
will not wake up
is struggling for breath
is stiff, shaking or jerking (this may be a seizure or fit)
has lips, tongue, face or skin that suddenly turn pale, blue or grey (on black or brown skin this may be easier to see on the palms of the hands or the soles of the feet)
is limp, floppy or not responding like they normally do (their head may fall to the side, backwards or forwards, or they may find it difficult to lift their head or focus on your face)

Do not drive yourself to A&E. The person you speak to at 999 will give you advice about what to do.

Get an urgent GP appointment or contact NHS 111 if you are worried about your baby or think they might be ill.

If sleep deprivation is significantly affecting your health or your baby's wellbeing, your health visitor can refer you to local sleep support services. You don't have to manage alone.

Frequently asked questions

At what age do babies sleep through the night?

Most babies don't consistently sleep through until at least 6 months, and many not until well into their first year or beyond. This is completely normal.

When can I start a bedtime routine?

Most babies respond well to a consistent bedtime routine from around 6–8 weeks. Keep it simple and predictable — the same calming sequence every night helps your baby associate those cues with sleep.

What temperature should my baby's room be?

The NHS and Lullaby Trust both recommend a room temperature between 16–20°C, a dark room, and a firm, flat mattress with no pillows or loose bedding for babies under 12 months.

When is the best time for sleep training?

Six to twelve months is the most common window if you choose to do it. For some babies at this age, night feeds may no longer be necessary.

Sources & further reading

General information, not individual medical advice. Speak to your GP, midwife or health visitor about your baby’s needs.