A 3 month old usually manages wake windows of 1 hour 15 minutes to 2 hours and takes 4 naps a day, each lasting about 40 minutes to 1 hour 30 minutes. Bedtime usually lands somewhere between 6pm and 8pm. Total sleep across 24 hours is typically 12 to 16 hours.
These numbers come from OBubba's own sleep engine for weeks 13 to 16. They are a guide to start from, not a target your baby has to hit.
At a glance
- Wake windows: 1 hour 15 minutes to 2 hours
- Naps: 4 naps a day
- Nap length: 40 minutes to 1 hour 30 minutes each
- Total day sleep: 2 hours 30 minutes to 4 hours
- Total sleep in 24 hours: 12 to 16 hours
- Bedtime window: 6pm to 8pm
A sample day
Here is one example of how a day could look, starting with a 7am wake up. It is just one example: babies vary, and so do days.
- 7:00am Wake up for the day, milk feed
- 8:15am Nap 1 (1 hour), after 1 hour 15 minutes awake
- 9:15am Awake
- 10:45am Nap 2 (1 hour 15 minutes), after 1 hour 30 minutes awake
- 12:00pm Awake
- 1:45pm Nap 3 (45 minutes), after 1 hour 45 minutes awake
- 2:30pm Awake
- 4:15pm Nap 4 (40 minutes), after 1 hour 45 minutes awake
- 4:55pm Awake
- 6:55pm Asleep for the night, after 2 hours awake (bedtime routine starts around 6:25pm)
That adds up to 3 hours 40 minutes of day sleep. If the last nap is short or skipped, an earlier bedtime within the window is a kind fix.
What's changing at this age
Three months is often when a real bedtime starts to appear. Many babies now settle for the night somewhere between 6pm and 8pm, and a predictable wind-down becomes more useful.
Wake windows take a noticeable step up, to roughly 1 hour 15 minutes to 2 hours. Your baby can handle more play and more of the world between sleeps, and the day usually still has around 4 naps.
Sleep is also starting to mature in the background. Over the next few weeks many babies move towards a more adult-like sleep pattern, which some families notice as more frequent waking. Our guide to sleep changes around four months walks through it calmly.
Common sleep problems and gentle fixes
Short naps of one sleep cycle
Waking after around 40 minutes is common. If your baby wakes grumpy, try a few minutes of gentle settling. If they wake happy, move on with the day.
Bedtime battles
If bedtime is turning into a long fight, look at the last wake window. It may be too short (not tired enough) or too long (past the sweet spot). Adjust by 15 minutes and watch for a few days.
False starts
A wake 30 to 45 minutes after bedtime is often linked to the end of the day. Try a slightly earlier bedtime or a calmer last hour.
Catnap needed late in the day
A short fourth nap is very normal. It can be in the pram or on you.
If things feel hard, you are not doing anything wrong. Small, gentle changes made one at a time, and watched for a few days, are usually kinder for everyone than a big overhaul. Look after yourself too: rest when you can, and lean on the people around you.
How OBubba helps
An age chart can only tell you what is typical. OBubba predicts your baby's next nap and bedtime from their own rhythm, not just the numbers on this page, and adjusts through the day as naps run long or short. After around four days of logging, the guidance becomes personal to your baby.
Find out more about nap prediction and how OBubba works as a gentle sleep consultant app in your pocket.
Frequently asked questions
How long should a 3 month old be awake between naps?
Usually 1 hour 15 minutes to 2 hours.
How many naps should a 3 month old take?
Around 4 naps, lasting roughly 40 minutes to 1 hour 30 minutes each.
What time should a 3 month old go to bed?
Somewhere between 6pm and 8pm suits many babies at this age.
How much total sleep does a 3 month old need?
Typically around 12 to 16 hours in 24 hours, including 2 hours 30 minutes to 4 hours of day sleep.
Safety and a gentle reminder
Every sleep, day and night, should follow safer sleep guidance. See The Lullaby Trust safer sleep advice and NHS: helping your baby to sleep. If your baby was born prematurely, use their corrected age when reading these ranges. The ranges are guides, not targets. If you are worried about your baby's sleep, feeding or health, speak to your health visitor or GP.
Keep reading
- Previous month: 2 Month Old Sleep Schedule, Wake Windows and Naps
- Next month: 4 Month Old Sleep Schedule, Wake Windows and Naps
- Every age on one page: wake windows by age
- Sleep changes around four months
- The clocks have just changed? Try our gentle reset after the clocks change
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