Between 3 and 5 months, most babies move from taking four (or more) naps per day to taking three. This transition is driven by lengthening wake windows — the baby can now sustain comfortable wakefulness for longer, meaning fewer naps are needed to complete the day. Recognising the signs of readiness allows parents to support the transition at the right time rather than too early or too late.
Healthbooq helps families navigate the common nap transitions of infancy.
Signs of Readiness for the 4-to-3 Transition
Resisting or skipping the fourth nap consistently: if the baby is regularly taking 30+ minutes to fall asleep for the fourth nap, or simply refusing it, this is a sign the fourth nap is no longer needed.
Consistently taking longer naps: as each nap covers more sleep per session, the total sleep need can be met in fewer naps.
Night sleep disrupted by late fourth nap: if the fourth nap is close to bedtime, it may reduce sleep pressure enough to make falling asleep at bedtime difficult.
Wake windows consistently reaching 90–120 minutes: if the baby is contentedly managing these wake windows, four naps no longer fit in the day.
How the Transition Works
The fourth nap is dropped, pushing the day to three naps. The wake windows between the remaining naps lengthen slightly. A typical 3-nap schedule at this age:
- Wake: 7:00am
- Nap 1: 9:00–10:00am (after 90–120 min)
- Nap 2: 12:30–1:30pm (after 150–180 min)
- Catnap 3: 4:00–4:30pm (after 150 min)
- Bedtime: 7:00–7:30pm
Managing the Transition Period
The first 1–2 weeks after dropping the fourth nap may involve temporary overtiredness, earlier bedtimes, and some adjustment to morning wake time. Moving bedtime 30–45 minutes earlier during the transition can compensate for the lost daytime sleep while the schedule adjusts.
Key Takeaways
The transition from 4 to 3 naps typically happens between 3 and 5 months, as wake windows lengthen from approximately 60–90 minutes to 90–120 minutes and beyond. Signs that the baby is ready include consistently resisting or shortening the fourth nap, taking longer to fall asleep for the fourth nap, or night sleep being disrupted by too much daytime sleep. The transition usually takes 1–4 weeks and may involve some temporary schedule adjustment.
