A 13-month-old typically needs 2.5 to 3 hours of daytime sleep. Most toddlers this age are still taking two naps, though some are beginning the transition to one. The total sleep goal for the full 24-hour day is 11 to 14 hours, including naps, so daytime sleep fills the gap between nighttime hours and that overall target.
How Daytime Sleep Breaks Down
On a two-nap schedule, each nap should last at least one hour but no longer than two. That puts total daytime sleep in the 2.5 to 3 hour range. A common pattern looks like a late-morning nap around 9:50 to 11:10 and an afternoon nap around 2:40 to 4:00, though your toddler’s exact times will depend on when they wake up for the day.
If your child has already moved to one nap, that single nap is longer, typically around 2 to 3 hours, often falling in the midday window (roughly noon to 3:00 PM). The total daytime sleep stays similar either way.
Wake Windows Matter as Much as Nap Length
At 13 months, most toddlers need about 3.25 to 4 hours of awake time between sleep periods. The shortest stretch usually falls in the morning and the longest comes before bedtime. A typical two-nap day spaces out like this:
- Before the first nap: about 3 to 3.25 hours after waking
- Before the second nap: about 3 to 3.5 hours after the first nap ends
- Before bedtime: about 3.5 to 4 hours after the second nap ends
On a one-nap schedule, wake windows stretch considerably: roughly 4.75 hours before the nap and 5.25 hours before bed. That’s a big jump, which is one reason most 13-month-olds aren’t quite ready for it yet.
Signs Your Toddler Is Ready for One Nap
The two-to-one nap transition happens somewhere between 12 and 24 months, and 13 months is on the early side. A few off days don’t mean it’s time to drop a nap. Look for a consistent pattern lasting at least two weeks before making the switch. Signs to watch for:
- Nap refusal: your toddler regularly fights or skips the afternoon nap but takes the morning one
- Chatting instead of sleeping: they talk or play through naptime rather than settling
- Cheerful without the nap: if a nap gets missed, they stay in good spirits until the next sleep period
- Longer wake tolerance: they comfortably stay awake for 4 to 5 hours without fussiness
- Uneven nap lengths: naps that used to be roughly equal are now varying a lot in duration
If only one or two of these pop up for a few days, it’s more likely a developmental blip than a true readiness signal. Plenty of 13-month-olds flirt with refusing a nap for a week and then go right back to needing both.
Why Daytime Sleep Still Matters at This Age
Naps aren’t just a break for you. They play a direct role in how your toddler’s brain processes new information. Research published in the Proceedings of the National Academy of Sciences found that toddlers who napped after learning new material showed measurable improvements in memory, while habitual nappers who were kept awake experienced significant forgetting. Children who had naturally outgrown naps didn’t show the same memory loss when they stayed awake, suggesting that the need for naps is tied to brain maturity. In other words, if your 13-month-old still needs two naps, skipping one doesn’t just make them cranky. It can interfere with how well they retain what they’ve been learning all morning.
The memory benefits were specifically linked to a type of brain activity that happens during lighter stages of sleep, which means even a shorter nap can be productive as long as your child falls asleep rather than just resting quietly in the crib.
What to Do When Naps Are Too Short
If your 13-month-old is consistently napping less than an hour per session, the total daytime sleep may fall short of that 2.5-hour target. Short naps are common at this age and usually come down to timing. A wake window that’s too short means your toddler isn’t tired enough to sleep deeply. One that’s too long means they’re overtired and wired, which also leads to fragmented naps.
Try adjusting the wake window before the problem nap by 15 minutes in either direction and hold that new timing for three to four days before deciding if it helped. Small shifts often make a bigger difference than overhauling the whole schedule. If the morning nap runs long (over two hours), it can steal sleep pressure from the afternoon nap, so capping it at 1.5 to 2 hours sometimes fixes an afternoon nap that’s been falling apart.
Putting It All Together
For a 13-month-old on two naps, a solid day of sleep looks like two naps of roughly 1 to 1.5 hours each, totaling 2.5 to 3 hours across the day. Wake windows of 3.25 to 4 hours keep the spacing right. Combined with 10 to 12 hours of nighttime sleep, that puts you comfortably inside the recommended 11 to 14 hours per day.
If your toddler is getting less than 2 hours of daytime sleep total and seems fine (happy between naps, sleeping well at night, developing on track), they may simply be on the lower end of sleep needs. The ranges exist because children genuinely vary. But if short daytime sleep comes with crankiness, frequent night waking, or early morning wake-ups, it’s worth tightening up the schedule before assuming your child just doesn’t need much sleep.