13 Month Old Wake Windows: Naps, Timings and a Sample Day

Most 13-month-olds do well with wake windows of roughly 3.25 to 4.25 hours. The first stretch of the day is usually the shortest, at around 3.25 hours, and the stretch before bedtime is the longest, often 4 hours or more. That last window does the heavy lifting: it builds the sleep pressure your baby needs for a long, settled night.

These are ranges because babies vary. Some 13-month-olds manage a 4.25-hour afternoon and settle beautifully. Others hit a wall at 3.5 hours. Neither baby is doing it wrong. Watch how your own baby settles across a full week. Quick, calm settling and decent naps mean the timing is close. Long calm playing in the cot usually means the window was too short, and distressed fighting usually means it was too long.

For the months either side of this one, see the full 10–14 month guide. If you want the day mapped out from your baby's wake-up time, the wake window calculator will do the arithmetic for you.

Two, for most babies. A typical 13-month-old takes a morning nap and an early-afternoon nap of about 45 to 75 minutes each, giving around 2 to 2.5 hours of daytime sleep.

In the nap-transition arc, 13 months sits in an in-between spot. The 3-to-2 transition is long finished. The 2-to-1 transition is on the horizon: most babies drop to one nap somewhere between 13 and 18 months, with 14 to 16 months the most common window. So at 13 months a small number of early transitioners are showing real readiness for one nap, while most babies still need both naps for another month or several.

This is why 13 months can feel confusing. The second nap starts to wobble on some days, friends' babies the same age are already on one nap, and nursery may be pushing for one nap too. None of those is evidence about your baby. The readiness signs below are.

Here is a realistic two-nap day. It assumes a 6:30am wake, so shift everything if your baby wakes earlier or later.

Time	What's happening
6:30am	Wake, milk and breakfast
9:45am	Nap 1 (about 45–60 minutes), after a wake window of about 3.25 hours
10:30am	Up, snack, out of the house if you can
11:45am–12:15pm	Lunch
2:15pm	Nap 2 (about 45–60 minutes), after a wake window of about 3.75 hours
3:15pm	Up for the afternoon
6:45pm	Start the bedtime routine
7:15pm	Asleep, after a final wake window of about 4 hours

The windows in this day run 3.25, then 3.75, then 4 hours. That widening shape through the day is the important part. The clock times are just one way to arrange it. If your baby wakes at 6am, everything moves half an hour earlier. If the second nap runs long, protect bedtime by waking your baby by around 3:30pm.

Probably not yet, and the age alone tells you that: 13 months is the very start of the typical transition window, and most babies transition between 14 and 16 months. A minority do drop to one nap around now, though, so it is worth knowing the real signs.

Signs of real readiness, present for at least 2–3 weeks:

• The second nap consistently takes 30–45 minutes or more to happen, with your baby calm in the cot the whole time
• The second nap, when it does happen, pushes bedtime past 7:30–8pm
• Your baby can stay awake for 5 or more hours without falling apart
• Night sleep is stable or has improved

False alarms:

• A few days of nap refusal, which at this age usually traces back to a developmental leap, teething or timing
• Refusing the second nap and then melting down by 4pm, which shows the nap is still needed
• Night sleep getting worse alongside the nap refusal, which points to overtiredness
• Nursery moving your baby to one nap, which is a staffing decision rather than an assessment of your child

When in doubt, keep offering two naps for another 2 to 3 weeks and see whether the pattern holds. A refused second nap costs you one early bedtime. A nap dropped too soon can cost you weeks of broken nights.

If the readiness signs above have held for a full 2 to 3 weeks, you may have one of the minority of babies who transition at 13 months. The move is the same as it would be at 15 months, just gentler on your side of it because a younger baby has less stamina.

• Place the single nap near midday. Aim for 12pm, with lunch beforehand at about 11:30am. If the morning stretch is too much at first, start the nap at 11:30am and edge it later by 15 minutes every few days. Keep it away from the old 10am slot, because a 10am nap leaves an afternoon far too long for a 13-month-old.
• Expect a shorter nap at first. The target is 1.5 to 2.5 hours, and it can take weeks to get there. A baby used to two 45-minute naps needs practice before one long midday sleep appears.
• Use early bedtimes without guilt. On a short-nap day, 6pm to 6:30pm is the move that saves the night. Bedtime drifts back to 7pm or so as the pattern settles.
• Expect mixed weeks. Most families see 4 to 8 weeks of some one-nap days and some two-nap days before it stabilises. Decide each morning based on how your baby seems, and count the transition as done once you get 5 to 7 one-nap days in a row.

And if you try it for a week and everything gets worse, that is useful information rather than a failure. Go back to two naps and try again in a month.

Wake windows that haven't grown with the baby. The timings that worked at 10 or 11 months are often too short by 13 months. The result is undertiredness: short naps of 30–40 minutes despite easy settling, long cheerful chatting in the cot at bedtime, and a baby who wakes from a brief nap bright-eyed and ready to go. If that sounds familiar, add 15–30 minutes to the windows and hold the new timing for 3–5 days before judging it. Our guide to overtired vs undertired helps you read which one you're seeing.

Reading every second-nap wobble as the transition. At 13 months the second nap will have off days. Treating a bad week as proof your baby is ready for one nap is the most expensive mistake at this age, because dropping the nap too early feeds an overtiredness spiral: worse nights, earlier mornings, harder naps.

The nursery mismatch. Many UK nurseries move children towards one nap around now for practical reasons. If your baby does one nap at nursery and still needs two at home, offer two on home days and bring bedtime 30–60 minutes earlier on nursery days. That mixed pattern is fine, and it is worth asking the nursery whether a short second rest is possible.

Wake windows describe a healthy baby on an ordinary week. Some weeks are not ordinary, and then the chart stops being useful for a while:

• Illness. A poorly 13-month-old needs more sleep and shorter windows. Let them have both, and return to normal timing once they're well.
• Teething. The first molars can arrive around now and they are a bigger event than the earlier teeth. Expect a rough handful of nights and judge nothing by them.
• Developmental leaps. New walking, climbing and a burst of understanding can all disturb sleep at 13 months. This looks like a schedule problem and isn't one.
• Travel, clock changes and big life changes. Hold your routine loosely for a few days rather than rebuilding the schedule around a blip.
• Temperament and sleep needs. Some babies sit at the low end of the normal sleep range and always will. If your baby is happy, growing and settling reasonably well on timings outside the chart, your baby wins the argument.

The rule of thumb: change nothing permanent during a storm. Use an early bedtime, as early as 6:30pm, to absorb bad nap days, and reassess once you've had a settled fortnight.

For the full month-by-month picture from 10 to 14 months, including the 12-month nap trap and the complete list of one-nap readiness signs, read the full 10–14 month guide. To plan today's naps from this morning's wake-up time, use the wake window calculator.

If naps are the sticking point, our guides to nap refusal and short naps go deeper on the two most common problems at this age.