By 18 months, most children have transitioned to a single midday nap and a more predictable overnight sleep pattern. But this period brings its own sleep challenges — bedtime resistance driven by growing autonomy and language, separation anxiety that has not yet peaked, and occasional night wakings linked to the intense developmental activity of this stage.
Healthbooq provides age-specific sleep support for toddlers at every stage.
Total Sleep Needs at 18–24 Months
The American Academy of Sleep Medicine recommends 11–14 hours per 24-hour period for children aged 12–24 months. By 18 months, this is typically distributed as:
- Night sleep: 10–12 hours
- Daytime sleep: 1–2.5 hours (single midday nap)
The Midday Nap at This Stage
By 18 months, the single midday nap is well established for most children. Typical nap timing is around 12:00–13:00, following a morning wake around 6:30–7:30. The nap usually lasts 1–2.5 hours. Some 18-month-olds still nap for 2.5–3 hours; as they approach 24 months, most naps settle into the 1–2-hour range.
Bedtime at 18–24 Months
Bedtime typically falls between 19:00 and 20:30, adjusted for morning wake time and nap duration. A child who naps well (1.5–2 hours ending by 15:00) usually needs a bedtime between 19:00 and 19:30 to arrive at bedtime with adequate sleep pressure.
Bedtime Resistance in This Period
The 18–24 month period frequently brings more sophisticated bedtime resistance: requests for extra stories, water, the toilet, "one more hug." This is partly separation anxiety and partly the emerging drive for autonomy and control. Clear bedtime routines — consistent sequence, consistent end point, consistent response to requests — are the most effective management strategy.
Night Wakings
Night wakings remain common at 18–24 months, though most children are capable of consolidated overnight sleep at this age. Night wakings in this period often have identifiable triggers: teething (second molars arrive around 18–24 months), developmental regressions, illness, or travel. Wakings without clear triggers may reflect residual sleep associations from infancy.
The 18-Month Regression
Around 18 months, many children experience a sleep regression linked to the developmental acceleration of this period: language explosion, emerging autonomy, beginning of pretend play, growing social awareness. This regression typically involves increased bedtime resistance and occasional night wakings and resolves within a few weeks.
Key Takeaways
The 18–24 month period is typically characterised by a settled single-nap schedule (one midday nap of 1–2.5 hours), overnight sleep of 10–12 hours, and the continued influence of separation anxiety at bedtime. Language development allows for more sophisticated bedtime resistance but also more sophisticated pre-sleep communication. Total sleep needs are 11–14 hours.
