Wake Windows for a 5 Month Old

A five-month-old sits in the same band as a four-month-old: an hour and a half to a bit over two hours awake between sleeps, 1 hr 30 to 2 hr 15, across three or four naps, inside a total of 12 to 16 hours of sleep per 24 hours. The band does not move this month, and that is the useful thing about it. What changes at five months is the baby inside the band, not the arithmetic around her — so if the day has come apart, the timing is probably not what broke.

This is the month a lot of families go looking for a new set of numbers because the old ones stopped working. There is no new set. There is a baby who has learned to move.

The band, unchanged

An hour and a half to two and a quarter, three or four naps, exactly as at four months. The next real step up is six months, where the band jumps to two to three hours — the largest single jump in the whole first year. Five months is the flat bit before it, which is why a five-month-old often looks like she is between sizes: too old for the day she had in March, too young for the one she will have in July.

Where those bands come from is the overview's job rather than this page's. The short version: the sleep panel publishes a total per 24 hours, not a wake window, and the windows are what falls out when you subtract a night and divide by the naps babies that age still take. The wake window calculator does that sum against the clock if you tell it when she last woke.

What is developing: the machinery for rolling

The American Academy of Pediatrics puts rocking on the stomach, kicking and swimming with the arms at about five months, and names them as the skills a baby needs for rolling over and crawling. By the end of that stretch most babies roll in both directions, though the time frame varies a good deal between babies.

Read that again with a cot in mind. A five-month-old has just acquired a set of movements she cannot yet do anything useful with, and the place she has the most uninterrupted time to practise them is a dark room at two in the morning. She is not waking because she is hungry, or teething, or because the window was eleven minutes wrong. She surfaces between cycles the way she has since four months, finds herself flat on her back with nothing to do, and starts rehearsing.

The answer is not a change to the schedule. It is floor time in the daylight — short, frequent, boring stretches on a firm surface with something just out of reach, several times a day. A skill that gets practised at eleven in the morning gets practised less at two. That is not a published finding and no source below states it; it is what parents commonly report and what the milestone guidance implies, and it costs nothing to try.

The third nap, the catnap, and running the day backwards

Most five-month-olds are on three naps with a fourth that comes and goes: a short catnap late in the afternoon that happens on the days the earlier naps were poor and gets refused on the days they were good. That is not inconsistency. That is a baby balancing her own total.

Which is why the day at this age is easier to run backwards from bedtime than forwards from the morning. Decide the hour you want her asleep, count back the long end of the band from it, and that is when the last sleep of the day has to end. Everything before that arranges itself around the naps that actually happened. Run it forwards instead — up at six, first nap at eight, second at eleven — and by four in the afternoon you are holding a tired baby and a schedule that no longer fits her.

The move from four naps to three lands somewhere around three to five months and no health body publishes a timetable for it. The 4 to 3 nap transition page covers the whole of it, and the nap transition checker is as willing to tell you to wait a fortnight as it is to tell you to change anything.

Early waking, and the window before bed

Five in the morning, wide awake, cheerful. It is the second most common complaint of this month and the first place worth looking is the last window of the day rather than the first.

A last stretch that runs long — because the catnap failed and bedtime stayed put — tends to buy you a harder settle and an earlier wake rather than a longer night. Bringing bedtime forward on the days the third nap does not happen sounds like the wrong direction and usually is not. None of that is published by anybody this site may cite: it is a pattern parents report, and it is written here as one. Try it for three or four days before you decide it did not work, and change one thing at a time.

Worth knowing too: waking in the night at five months is ordinary, and it stays ordinary for a good while yet. Nothing on this site attaches an age to sleeping through the night, because nobody this site is allowed to cite does.

Solids are not the answer to sleep

Somebody will suggest it this month, usually kindly. The AAP's own guidance is that solid foods should start to be added at about six months, and that babies are fed when they seem hungry rather than to a clock. No source listed below says that starting earlier buys a longer night, and this site will not say it either.

The honest version is duller: milk is still the whole of her nutrition at five months, a feed in the day does not purchase a night, and when solids do arrive they arrive for reasons that have nothing to do with sleep. If she has genuinely started needing more milk — a growth spurt is real — feed her. That is a different sentence from feeding her in order to fix the night.

The cot, at five months

If she is rolling, or doing anything that looks like the beginning of it, the swaddle is finished. A swaddled baby who gets onto her front cannot push herself back up or free her arms, and that is the whole reason for the rule.

The rest does not change with the month. Always on their back for every sleep, day and night, on a firm flat mattress, in a separate cot in your room for at least the first six months, and the cot clear of blankets, pillows, bumpers, soft toys, pods and nests — anything that could cover her face. Nothing weighted goes on or over a sleeping baby. If she rolls onto her front by herself once she can roll both ways, you put her down on her back and you do not have to spend the night turning her back over.

What to do this month

Give her the floor in the day and the same band at night. Move one thing — usually the last window — by fifteen minutes and hold it for three days. Write down what happened; four evenings of your own notes will beat any table on the internet, this one included. The sleep schedule generator will lay the bands out as a sample day if you want a shape to start from.

And take the pressure off the numbers. Your baby will have her own pattern of waking and sleeping and it is unlikely to be the same as other babies you know — that is the NHS's first sentence on the subject, before any advice at all. If what worries you is not the timing but the baby — feeding, weight gain, a baby who cannot be settled at all, a cry that does not sound like her usual one — that is a conversation with your pediatrician or health visitor. Nothing here is medical advice and no page can see your baby.