3 Month Old Wake Windows (UK): How Long Awake Between Naps at 12 to 16 Weeks

Your baby is around 12 or 13 weeks old, and the 60 to 90 minute windows that worked last month have stopped fitting: naps are starting earlier or later than they used to, and you're trying to work out the new number. Here's the wake window most 3 month olds settle into, where it comes from, and how to treat it.

The short answer: at around 3 months, most babies manage about 75 to 120 minutes awake between sleeps, and that includes the feed and the nappy change. The first window of the day is the shortest, the last one before bed is the longest. That figure is a rough range from sleep guides, not an NHS rule: the NHS doesn't publish wake windows. Use 75 to 120 minutes as a starting point, and let your baby's cues lead.

How long should a 3 month old be awake?

Our wake windows chart puts 3 to 4 month olds in a 75 to 120 minute window, a step up from the 60 to 90 minutes we give at 8 weeks. Our week-by-week newborn guide says the same thing from the other direction: at weeks 11 to 12, most babies are approaching the 3 to 4 month pattern. So, for a 3 month old:

• Typical wake window: about 75 to 120 minutes. The first one of the day tends to sit at the shorter end; the last one before bed at the longer end.
• It counts everything awake: the feed, the nappy change, the cuddle and the wind-down all sit inside the window, so there is less "play time" than it sounds.
• Naps: our nap schedule by age has 3 to 4 month olds on 3 to 5 naps a day. Most 3 month olds are at the higher end of that, with a short catnap late in the afternoon.

These are averages, not rules. A baby who is happy at 130 minutes isn't doing anything wrong, and one who is grizzly at 60 isn't either.

Does the NHS give a wake window for a 3 month old?

No. The NHS publishes no wake window figures and no nap schedule for any age, so every number you'll find online, ours included, comes from sleep guides and consultants and differs a little between sources. What the NHS does publish is how much babies sleep at this age and how it changes.

On its baby sleep patterns page it says "Your baby may sleep in short or long bursts", and that "It's highly unlikely they'll sleep through the night because they have tiny tummies and need to be fed". Its helping your baby to sleep page adds, for 3 to 6 months, "Some babies may sleep for 5 to 8 hours or longer at night, but not all". Note the words: "some" and "may". No fixed figure for a 3 month old.

What a 3 month old wake window looks like in practice

A typical day at 12 to 13 weeks has four or five waking stretches, each ending in a nap or the night feed. Often the morning window is closest to the lower end (75 to 90 minutes) and the window before the last sleep of the evening stretches past two hours, with the catnap sitting between them. A short last nap followed by a longer evening window keeps bedtime from drifting too late.

The NHS suggests teaching your baby from early on that night-time is different from daytime: "During the day, open curtains, play games and do not worry too much about everyday noises when they sleep", and "at night, you might find it helpful to keep the lights down low and not talk much and keep your voice quiet". Bright and sociable by day, dim and quiet at night, helps a 3 month old's rhythm settle.

Is 3 months when a bedtime routine starts to work?

Often, yes. The NHS says "Getting your baby into a simple, soothing bedtime routine may help them settle and can be a great opportunity to have 1-to-1 time with your baby". At 3 months a routine is still short and loose — a wash or bath, pyjamas and sleeping bag, a feed, a story or song, lights down, bed — but it starts to firm up around now. Our baby bedtime routine by age covers how it changes as they grow.

Why 3 months can feel different from 2 months

Three things usually shift together between 8 and 13 weeks. The windows stretch by about 15 to 30 minutes, so an identical 10am nap now ends earlier in the morning and feels harder to put down. The day shape gets more legible: shortest window first thing, longest before the final evening sleep. And many babies hit a growth spurt around 3 months (see our growth spurts guide), which can mean a week of extra feeds and shorter naps.

What's around the corner is bigger: at about 4 months, a wider change arrives, with naps often shortening to 30 or 40 minutes and nights breaking up. See our guides to 4 month old wake windows and the 4-month sleep regression for what to expect, and how to ride it out.

Seeing your own baby's pattern

The useful number isn't ours or anyone else's. It's how long your baby is actually awake before they get fussy, over a week. Logging each sleep lets you see it without doing sums at 4am. CubTrack logs naps and night sleep on the free tier and shows the wake window since the last sleep, and your partner sees the same timeline for free, so whoever has the baby can see how long they've been up.

Related reading

• Wake windows by age chart (0 to 24 months)
• Newborn wake windows week by week
• 2 month old wake windows
• 4 month old wake windows
• Baby nap schedule by age
• Baby growth spurts

Frequently asked questions

What is a good wake window for a 3 month old?

About 75 to 120 minutes, including the feed and nappy change. The first window of the day tends to sit at the shorter end, the last one before bed at the longer end. It is a rough range from sleep guides; the NHS doesn't publish wake windows.

What is the wake window for a 12 week old?

Much the same: 75 to 120 minutes. Our week-by-week guide says most babies are approaching the 3 to 4 month pattern by weeks 11 to 12, with some still a little shorter on the morning window.

What is the wake window for a 13 week old?

Also about 75 to 120 minutes. Thirteen weeks sits inside the 3 to 4 month range on our chart.

Does the wake window include feeding time?

Yes. The window runs from when your baby wakes to when they next fall asleep, so the feed, the nappy and any play are all inside it.

How many naps should a 3 month old have?

Our nap guide has 3 to 4 month olds on 3 to 5 naps a day. The NHS doesn't give a number of naps for any age.

How much should a 3 month old sleep?

The NHS doesn't give a figure for 3 months. For 3 to 6 months, it says some babies may sleep for 5 to 8 hours or longer at night, but not all.

Why is my 3 month old only napping for 30 minutes?

Short naps at this age are common, and more common again at 4 months. A baby's sleep cycle is short and many wake at the end of the first one. Check the wake window first (too short and they are not tired enough; too long and they wake overtired), and don't change more than one thing at a time.

Can a 3 month old sleep through the night?

The NHS says some babies at 3 to 6 months may sleep for 5 to 8 hours or longer at night, "but not all". There is no reliable age by which a baby "should" sleep through.

Sleep information checked against the NHS in November 2026. Wake window and nap ranges match our own guides; the NHS publishes no wake window figures. This is general information, not medical advice; speak to your health visitor or GP about your baby. CubTrack is made by OakFox Limited.