Wake Windows by Age: A Guide to Your Baby's Sleep Rhythm
A wake window is the time your baby can comfortably stay awake between sleeps. See typical windows from newborn to 12 months and how to use them gently.
Before you use this guide: This is general educational information, not an individual medical assessment. We do not identify a clinician reviewer on this page, so please confirm personal health decisions with your doctor, midwife or paediatrician.
A wake window is the length of time your baby can stay awake comfortably between one sleep and the next. If a baby is kept awake too long, they can become overtired and find it harder to settle. Put down too soon, they may not be tired enough. Wake windows are averages that can help you guess when a nap is due. They are not rules, and your baby's own cues matter more.
Typical wake windows by age
- Newborn (0 to 4 weeks): about 30 to 60 minutes
- 1 to 3 months: about 1 to 1.5 hours
- 3 to 4 months: about 1 to 2 hours
- 4 to 6 months: about 1.5 to 2.5 hours
- 6 to 9 months: about 2 to 3 hours
- 9 to 12 months: about 2.5 to 3.5 hours
- 12 to 15 months: about 3 to 4 hours
The number of naps also changes. Young babies sleep in many short bursts through the day and night. Over time, the naps become fewer and longer, and many babies move to about two naps a day by the end of the first year. If your baby was born early, use their corrected age.
Signs that your baby is tired
Early cues include yawning, rubbing eyes or ears, staring into space, looking away, going quiet and clenched fists. Late cues are arching the back, crying and becoming hard to settle. If you see late cues, your baby may already be overtired.
How to use wake windows gently
- Watch for sleepy cues first, and use the clock as a back-up.
- Start winding down 10 to 15 minutes before the end of the window, with dimmer lights, quiet and a cuddle.
- Remember that feeding, nappy (diaper) changes and play all count as awake time.
- The first window of the day is often the shortest, and the last window before bed the longest.
- Shorten the next window if the last nap was short or your baby slept poorly the night before.
- Adjust as your baby grows. Needs change every few weeks.
It is not a strict schedule
Babies differ in temperament, and growth spurts, teething, illness and developmental leaps can all change how much sleep they need. A flexible rhythm that works for your family is more helpful than watching the clock. If following a schedule is making you anxious, put it aside and respond to your baby.
Safe sleep for naps
The same safe sleep rules apply to every sleep, day or night. Place your baby on their back on a firm, flat surface, with nothing else in the cot. If your baby falls asleep in a car seat, carrier or pram, move them to a flat sleep space when you can. Read our guide to safe sleep for babies.
When to talk to a professional
- A newborn who does not wake for feeds, or is very sleepy and difficult to rouse
- A baby who is consistently sleeping much less than expected and is distressed or unwell
- Snoring, laboured breathing or pauses in breathing during sleep
- Poor weight gain or feeding difficulties
Trusted resources to read next
These public health resources provide additional information. Guidance can vary by country, so prioritise advice from your own care team and local health service.
- CDC: Helping babies sleep safely — Safe sleep environment recommendations for babies.
- NHS: Early days — Newborn checks, feeding, and support during the first days.
This content is for general information only and is not medical advice. Every pregnancy and every baby is different. Always talk to your doctor, midwife or paediatrician about your own situation, and seek urgent care if you are worried.