Kidy
If your baby wakes every hour, you're not doing it wrong. You're watching sleep cycles, one after another, with a request for help at the end of each. The short version:
- An infant sleep cycle is about 47–50 minutes, so "every hour" is often one cycle, then a wake (Promoting and Protecting Infant Sleep, 2012)
- How your baby falls asleep decides what they ask for at every wake. The AAP says babies rocked or held to sleep can struggle to resettle (AAP)
- Most babies still wake in the second half of the first year. 78.6% of 6–12-month-olds woke at least once a night in one UK study (Brown & Harries, 2015)
- Sleep training didn't harm attachment in a randomized trial of 6–16-month-olds, and night wakings fell (Gradisar et al., 2016)
- Call your pediatrician for snoring with pauses, breathing trouble, fever or weight loss
This guide walks through the causes by age, a decision path for tonight, and the signs that mean you stop troubleshooting and call.
Quick reference: hourly night wakings
| Question | Short answer |
|---|---|
| Why every hour? | A sleep cycle ends at about 47–50 minutes, and the baby can't link into the next one alone (PMC, 2012) |
| Most common driver | The way your baby falls asleep: whatever gets them there, they ask for again at each wake (AAP) |
| Is it normal to still wake at 6–12 months? | Yes. 78.6% woke at least once a night (Brown & Harries, 2015) |
| Should I feed every time? | Under 6 months, feed. Older, feed for real hunger, not every wake |
| Is sleep training harmful? | Not in the best trial so far: attachment unchanged at 12 months (Gradisar et al., 2016) |
| When to worry | Snoring with pauses, sweating, fever, weight loss, sudden change in an older child |
Why a baby wakes every hour: the mechanism
Everyone surfaces briefly between sleep cycles. Adults roll over and don't remember. Babies surface too, and in healthy term infants a cycle runs about 47 to 50 minutes (Promoting and Protecting Infant Sleep, 2012). That's why "every hour" is the classic complaint.
What happens at the surface depends on how the baby fell asleep. The AAP's advice is direct: if you hold or rock babies to sleep, they may struggle to go back to sleep when they wake in the night, and putting them down drowsy but awake helps them learn to fall asleep in their own bed (AAP, Getting your baby to sleep).
So hourly wakings rarely mean hunger every 60 minutes. They usually mean the bridge between cycles needs you. The job is working out which bridge.
Common causes by age
Newborn to 3 months. Hunger drives most wakes, and sleep is still immature. Frequent night feeds are normal, not a problem to fix.
Around 3–5 months. Many families describe a "4-month regression" here, when short wakes turn into full ones. How you respond at the cot in these weeks tends to shape the months after.
6–8 months. How your baby falls asleep matters most now. At the breast, on a bottle, in arms, rocked: they'll ask for the same at each cycle end. See baby only sleeps when held, and for the six-month version of this pattern, 6-month-old waking every 2 hours.
8–10 months. Separation worries and new moves (crawling, pulling up) often show up at night. See the 8-month sleep regression.
12–18 months. Nap changes leave toddlers overtired, and overtired nights are choppier. Rebalancing daytime sleep often settles the night.
Any age. Teething, colds, ear infections, reflux. The NHS lists poor sleep among teething signs (NHS, Baby teething symptoms). The clue for all of these: it started suddenly and doesn't match a developmental change.
How night sleep, naps and wake windows fit together at each age, from newborn to two, is laid out in the baby and toddler sleep guide for 0–2 years.
Decision path: what to do tonight
Work through it in order.
- Under 6 months, or any concern about weight gain? Feed when your baby asks. Look at sleep habits only once your pediatrician is happy with growth.
- Did the hourly wakes start in the last week, with nothing else changed? Hold steady for 10–14 days and avoid adding new sleep props. Many short rough patches pass on their own.
- Does the wake come roughly one cycle after a parent-led fall-asleep (rocked, fed, held)? That points to the fall-asleep condition. Change bedtime, not the 2 a.m. response. See biggest baby sleep mistakes parents make.
- Fighting bedtime and waking hourly? Probably overtired. Check the signs your baby is overtired and the wake windows by age chart, then pull bedtime 15–30 minutes earlier for three nights.
- A sudden change in an older baby who slept well? Think teething, illness or a short regression first. See baby suddenly waking more at night.
If two apply, start with the simplest: timing and wake windows, before you change how bedtime happens.
The finding worth repeating
Parents worry that letting a baby cry for a few minutes will do damage. The best test of that so far is a small Australian trial: 43 babies aged 6 to 16 months, randomly given graduated extinction, bedtime fading, or sleep education only. With graduated extinction, night wakings fell sharply. The babies' salivary cortisol, the stress hormone, went down slightly, not up. And a year later there was no difference in emotional or behaviour problems, or in secure attachment, between the groups (Gradisar et al., 2016).
It's one small trial, not the final word. But "a few minutes of protest will harm the bond" isn't what it found. Whether to try it is still your call. See is sleep training safe? what science says.
Common mistakes
- Feeding every wake past 6 months. Some night feeds are real hunger at this age. A feed every hour usually isn't; it's how your baby learned to fall back asleep. In the UK study, babies who ate more by day fed less at night but woke just as often (Brown & Harries, 2015).
- Keeping bedtime fixed after a bad nap day. Short naps call for an earlier bedtime, not the usual one.
- Switching strategies every two nights. Any approach needs about a week of consistency before you can tell whether it's working.
- Rocking to sleep "just for tonight" in a rough patch. The rough patch ends; the rocking stays. Try a hand on the chest in the cot, or a hum from the doorway.
- Comparing with a friend's 12-hour sleeper. Plenty of healthy 9-month-olds still wake once or several times a night.
When to call the pediatrician
Call your pediatrician, not a sleep consultant, if you see:
- snoring, gasping, mouth-breathing or pauses in breathing during sleep
- heavy sweating in sleep, especially a wet head
- sudden frequent wakings in a child over 18 months who used to sleep through
- fever, ear-pulling, refusing food or losing weight
- hourly wakings still going after 6 weeks despite consistent changes
These can point to sleep apnea, reflux, anaemia, ear infections or other treatable problems. Sleep work doesn't fix any of them. And whatever else you change, keep sleep safe: on the back, in a clear cot (AAP, A parent's guide to safe sleep).
Frequently asked questions
How long does an hourly-waking phase last?
A rough patch after a change or illness often settles within a few weeks. When the wakes come from how your baby falls asleep, they tend to continue until that changes, and then often ease within one to two weeks of doing it consistently. Past six weeks with no progress, look for a medical cause.
Should I let my baby cry it out?
It's a family decision, and the AAP doesn't back one single method. In the trial above, graduated extinction in 6–16-month-olds cut night wakings with no difference in attachment a year later (Gradisar et al., 2016). Under 6 months, feed and comfort first.
Is hourly waking always a sleep regression?
No. Often it's the way your baby falls asleep. The clue is timing: a wake that comes about one cycle after being rocked or fed to sleep points to the fall-asleep condition rather than a developmental phase.
My baby slept well and suddenly wakes every hour. What changed?
Most likely teething, an illness, a wake window that no longer fits after a nap change, or a new skill. See baby suddenly waking more at night.
Will going in make it worse?
Brief, boring responses (a hand on the back, a quiet "shh") rarely make things worse. The AAP suggests not rushing in, since babies need a little time to settle themselves (AAP). Picking up, feeding and lights on add more to the wake.
How do I tell hunger from habit at 9 months?
A hungry baby takes a full feed and goes back down calmly. A habit feed is a few sucks, drifting off, and awake again within the hour. If you shorten the response for a few nights without removing feeds, real hunger stays and habit feeds fade.
How KidyGrow helps
At midnight, on the fourth wake, the only useful question is how long your baby was up before bedtime. By then nobody knows.
KidyGrow remembers, if the last nap was logged. The Sleep insights screen shows how long your baby has been awake against the usual wake window for their age. On a paid plan, the Tonight plan runs the same check: when the stretch since the last nap is past the top of that range, the plan calls it overtired and points to an earlier bedtime, not another soothing trick.
If the last nap never got logged, there is no clock to read, so it doesn't guess.
Sources
- Promoting and Protecting Infant Sleep (accessed 2026).
- AAP HealthyChildren, Getting your baby to sleep (accessed 2026).
- Brown A, Harries V. Infant sleep and night feeding patterns during later infancy. Breastfeed Med. 2015;10(5):246-52.
- Gradisar M, et al. Behavioral interventions for infant sleep problems: a randomized controlled trial. Pediatrics. 2016;137(6):e20151486.
- NHS, Baby teething symptoms (accessed 2026).
- AAP HealthyChildren, A parent's guide to safe sleep (accessed 2026).
