13-month-old not sleeping through the night: causes and a 7-day plan

If your 13-month-old is waking every few hours, you're in very crowded company. Many families see a fresh wave of night waking right when toddlers look "older" — but sleep at this age is still sensitive to schedule drift, teething, milestones, and nap timing.

The short version:

• Night waking at 13 months is common, not failure — many healthy toddlers still wake at least once
• The usual culprits: nap timing off, bedtime drift, sleep associations, illness/teething, developmental leaps
• First fix: stable wake time + age-appropriate nap timing + one consistent night response
• Give a plan 5–7 nights before concluding it doesn't work — sleep timing changes need that long
• Call the pediatrician for breathing problems, persistent pain, fever, dehydration, or growing concern

Quick reference: 13-month night waking

For age-appropriate awake windows, see wake windows by age.

Why is my 13-month-old waking up so much at night?

Night waking at this age is usually a mix of schedule + habits + development, not "bad behavior."

Schedule issues are the quiet cause parents underestimate:

• First nap too early can "steal" sleep pressure before night sleep
• Bedtime too late creates overtired sleep that fragments
• Too much daytime sleep reduces night sleep drive
• First nap pushing the second too late leaves a tiny gap to bedtime, then a tough night

Habit loops matter because toddlers wake between sleep cycles (just like adults) — they just may not resettle the same way:

• if every waking ends in milk, rocking, or screens, your child learns that this is how sleep continues
• early-morning waking can become "locked in" if the day starts at 5:10 a.m. for a week
• a new prop introduced during illness ("we just helped him fall asleep that night") can outlast the illness by weeks

Development still plays a role: language bursts, separation anxiety, motor leaps (walking is huge at this age), and teething can increase arousal at night (NHS — Helping your baby to sleep).

Is this a sleep regression?

Sometimes — but the "12-month sleep regression" label is mostly informal. What's happening at 13 months is often:

• the 2-to-1 nap transition (the most common driver at this age)
• separation anxiety peak (around 12–18 months)
• a developmental leap (walking, talking, climbing)
• a teething wave (canines coming in around 16–22 months but molars can arrive earlier)

If you're in the middle of the nap transition specifically, see how to switch from 2 naps to 1 nap — that often fixes the night.

A practical 7-day plan (keep it boring on purpose)

The most-common mistake at this age is "change everything every night." Sleep needs consistency to settle. Here's a plan that gives changes time to work.

Days 1–2: fix the anchors

• Same wake-up time within ~30 minutes (don't let it slide because of a rough night)
• Protect nap timing for age — avoid an ultra-early first nap unless that's truly your only option
• Bedtime within a 30-minute window, not "whenever they look tired"

Days 3–5: one night strategy

Pick one calm response pattern and keep it consistent for 3 nights:

• if night feeding: same brief, calm response each time (or planned reduction)
• if rocking: same length, same place, same words
• if a prop fell out: same response (replace once, then stop)

Do NOT add a brand-new sleep "gadget" or change methods every night. Toddlers read inconsistency as "we're not sure either."

Days 6–7: review the trend

• compare average wake-ups across the week, not one bad night
• look at: did the nap timing settle? Bedtime within window?
• if improvement is starting, hold the plan for another week before changing anything

If after 7–10 nights of real consistency there's no improvement, that's a signal to talk to your pediatrician or revisit the schedule (often the nap transition is the actual story).

For broader sleep context, see baby sleep guide 0–2 years.

Common mistakes that keep night waking alive

• Changing bedtime dramatically every night — you never learn what mattered
• Moving bedtime later "to tire them out" without fixing nap timing — often backfires; overtired sleep is worse, not better
• Starting the day at 5 a.m. "to stop the crying" — accidentally reinforces early waking
• Fixing five variables at once, then concluding "nothing works" — you need controlled changes to learn anything
• Treating one bad night as failure — sleep changes in averages, not single nights
• Comparing to other kids — your 13-month-old's sleep is not your friend's 13-month-old's sleep

For the most common short-nap and short-sleep traps, see signs your baby is overtired.

What to check before assuming "regression"

Before concluding "this is just a phase, ride it out," check the easy fixes:

1. Wake window math. At 13 months, before the first nap the wake window is usually 4–5 hours. Before bed it's often 5–6 hours.
2. Total daytime sleep. More than ~2.5–3 hours of nap can erode night sleep at this age.
3. Room temperature. 18–20 °C is the typical sweet spot; warm rooms wreck toddler sleep.
4. Sleep environment. Dark, quiet, no screens. Even a faint hall light can matter.
5. Hidden illness. Ear infection, mild reflux, or constipation can cause invisible nighttime discomfort.

For the AAP's general sleep recommendations by age, see healthy sleep habits.

When to call the pediatrician

Contact your pediatrician if night waking comes with:

• breathing difficulty during sleep (snoring with pauses, loud labored breathing)
• persistent pain or inconsolable distress
• prolonged fever
• poor hydration or failure to thrive
• suspected ear infection (tugging ears, fluid, fever)
• your worry is growing, not settling

Pediatricians take parental concern seriously — especially when sleep changes are dramatic and out of pattern.

Frequently asked questions

Is it normal that my 13-month-old still wakes at night?
Yes — many healthy toddlers still wake at least once. The question is whether wakes are trending worse, staying flat, or improving with a consistent plan. One bad night is noise; two weeks of worsening is signal.

Could teething cause all of this?
Teething can disturb sleep for a short stretch (2–5 nights around a tooth breaking through). If the pattern lasts weeks with no improvement, look at schedule and habits too — "still teething" is rarely the full story.

Should I night-wean?
That is a personal and medical conversation. Some families keep one feed; others shift calories to daytime. If you change feeding at night, do it with a plan you can sustain for at least 7 nights.

Will sleep training fix this automatically?
Some families benefit from structured approaches; others mainly need schedule repair. Most "sleep training failures" at this age are really nap-timing issues in disguise.

My 13-month-old wakes at 5 a.m. — is that night waking or early waking?
If they're up for the day at 5 a.m. consistently, that's early waking, not night waking. Often it's the same fix (later first nap, slightly earlier bedtime) but the framing matters for which lever to pull first.

Could a developmental leap really cause this?
Yes. Big motor milestones (walking) and language explosions often surface as night waking for 1–2 weeks. The cure is patience + holding the schedule; don't add new sleep props during the leap.

How KidyGrow can help

KidyGrow learns your child as you log naps, bedtime, wake-ups, mood, and illness — and 13-month night waking is exactly when pattern visibility earns its keep. The hardest part isn't choosing a plan; it's knowing whether last night was the plan failing or the day (short nap, late bedtime, growing tooth) sabotaging the plan.

The Daily Brief surfaces those patterns in a few days — because the app remembers the small details you'd otherwise forget (Monday's 45-minute nap → Monday's 11 p.m. wake; Wednesday's calm afternoon → Wednesday's better night). The view is personalized to your child's last week, not a generic age chart. When the pattern is clear, the next move is obvious — often it's "first nap is too early on weekdays," not "we need a new method." Calibration takes 3–5 days of regular logging; the longer you use it, the sharper the picture.

For the broader sleep playbook, see baby sleep guide 0–2 years.

_This content is educational and does not replace professional sleep or medical advice. If sleep is significantly impacting your family, talk to your pediatrician._

Sources

1. AAP HealthyChildren — Healthy Sleep Habits: How Many Hours Does Your Child Need? (accessed 2026).
2. AAP HealthyChildren — Sleep (accessed 2026).
3. NHS — Helping your baby to sleep (accessed 2026).
4. NHS — How much sleep do children need? (accessed 2026).