Wake Window

9-Month-Old Wake Windows

Most 9-month-olds stay awake about 2 hr 30 min – 3 hr 30 min between sleeps. It’s the range the Wake Window app uses for babies aged 7–9 months.

When is your 9-month-old’s next nap?

Baby’s age

9 months

Next nap window

Getting the time…

Your next nap window will appear in a moment.

At 9 months

Nine months is the last month in the 2 hr 30 min – 3 hr 30 min range, and many babies are comfortable toward the longer end of it.

From 10 months the suggested range moves to 3 hr – 4 hr, so if your baby is regularly happy at three and a half hours, they may simply be ahead of the chart.

Where 9 months fits

Suggested wake windows from newborn to 12 months. The highlighted row is this page.

  1. Newborn30–60 min
  2. 1 month60–90 min
  3. 2 months60–90 min
  4. 3 months1 hr 15 min – 2 hr
  5. 4 months1 hr 15 min – 2 hr
  6. 5 months2 hr – 2 hr 45 min
  7. 6 months2 hr – 2 hr 45 min
  8. 7 months2 hr 30 min – 3 hr 30 min
  9. 8 months2 hr 30 min – 3 hr 30 min
  10. 9 months2 hr 30 min – 3 hr 30 min
  11. 10 months3 hr – 4 hr
  12. 11 months3 hr – 4 hr
  13. 12 months3 hr – 4 hr

An example morning

  1. 7:00 AMWakes up for the day
  2. 9:30–10:30 AMFirst nap window: 2 hr 30 min to 3 hr 30 min after waking
  3. 10:00 AMFalls asleep
  4. 11:00 AMWakes after a 1 hr nap. The clock starts again
  5. 1:30–2:30 PMNext nap window
An example for a 9-month-old, assuming a 1 hr nap that starts mid-window. Real naps vary, and each new window counts from when your baby actually wakes.

Signs your baby may be tired

  • Yawning
  • Rubbing eyes or pulling at ears
  • Staring off or losing interest in toys and faces
  • Turning away or burying their face in your chest
  • Getting quieter, or fussier
All the signs of a tired baby

Signs the wake window may be too long

  • Crying that's hard to soothe
  • Arching the back or fighting being held
  • Taking much longer than usual to fall asleep
  • A short nap after a long stretch awake
Signs of an overtired baby

Common questions

Can a 9-month-old stay awake 4 hours?

Four hours is beyond the typical range for 9 months, though some babies approaching 10 months manage it. If your baby is fussy by then, offer sleep earlier.

What if the chart doesn't match my baby?

That's common. Ranges are typical starting points. The Wake Window app lets you set a custom wake window that fits what you see.

Wake WindowNext nap on your Lock Screen

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