Wake windows, age by age
This guide is general information only and isn't a substitute for medical advice. If you're concerned about your child's health, or they're unwell, please see a doctor.
A wake window is simply how long your baby can happily stay awake between sleeps before they tip into overtired. Many consultants suggest that getting it roughly right makes settling easier, and that pushing well past it can leave you with a wired, hard-to-settle baby and a nap that falls apart at the 40-minute mark. Here are the ranges most consultants work from.
One thing before the numbers:wake windows aren't official medical guidance. They're a rule of thumb drawn from the accumulated experience of sleep services and consultants, useful starting points rather than clinically established ranges, and they haven't been tested in high-quality clinical trials.
The usual ranges
| Age | Typical wake window |
|---|---|
| Newborn (0 to 3 months) | roughly 45 to 90 minutes |
| 3 to 4 months | roughly 1.5 to 2.5 hours |
| 4 to 6 months | roughly 2 to 3 hours |
| 6 to 9 months | roughly 2.5 to 3.5 hours |
| 9 to 12 months | roughly 3 to 4 hours |
| 12 to 18 months | roughly 4 to 6 hours as the second nap drops |
| 18 months to 3 years | roughly 5 to 6 hours, with the pre-bed window usually the longest |
These are a starting point, not a rule
Every baby is different, and the right window is the one that gets your child to sleep without a battle, so treat the numbers as a guide and let your baby fine-tune them. If your baby happily stays awake longer than the range for their age, that's not a problem: the ranges are a starting point, not a limit, and a content baby who lasts longer isn't doing anything wrong.
Watch tired signs alongside the clock: yawning, staring into space, grizzling, ear-pulling, jerky movements. The last window of the day is usually the longest, which helps build enough sleep pressure for bedtime.
When the numbers stop working
If naps are short or bedtime is a fight, the window before that sleep is often the thing to adjust. Try a little longer if your baby fights sleep and clearly isn't tired, or a little shorter if they melt down before you can get them down. Overtiredness and undertiredness can look almost identical, so change one thing at a time and give it three or four days before you judge it.
Newborn sleep is the exception. Very young babies can't stay awake for long and don't follow a schedule yet, and that's completely normal. Don't try to stretch a newborn to hit a number.
As a rough rule, windows lengthen as your baby gets older and can handle more awake time, so revisit them every few weeks rather than locking in one figure. If you track naps in an app or a notebook, look for the window that consistently produced the easiest settle and the longest sleep, and treat that as your baby's current sweet spot until they outgrow it.
Sources
Related guides
Safe sleep: the basics every parent should know
The six Red Nose recommendations for every sleep, day and night, and why they matter.
How much sleep does my baby actually need?
Typical sleep ranges from newborn to preschool, and the signs your child may be short on sleep.
White noise, blackout and temperature
The three environmental levers that make settling easier, and what the guidance actually says.
Not sure what your baby's day should look like?
A consultant can build a daily rhythm around your child's real wake windows. Start with your age group.
Consultants who can help with this
Kin Postpartum Services
Hannah (Kin Postpartum Services)
TAS · Online
Pricing on enquiry
Baby Don't Cry
Ruth Monk
Bream Creek, TAS · Online
$500+
After the Bump
Toowoomba, QLD · Online
Pricing on enquiry
Last updated: July 2026. Sources include Red Nose Australia and Raising Children Network where cited above. This guide is general information only. For individual concerns, see your GP or child health nurse.