How to Get a Baby to Sleep: Techniques That Actually Work
There is no single technique that works for every baby. What works at 6 weeks doesn't work at 6 months. What works for one baby is completely ineffective for another. This guide gives you the framework, wake windows, environment, routine, and settling options, so you can find what works for yours.
Wake Windows: The Single Most Impactful Change
A wake window is the maximum time a baby can comfortably be awake before sleep. Keeping baby awake beyond their wake window triggers cortisol release, which makes them harder to settle, not easier. This is the single most common mistake: trying to settle an overtired baby and wondering why nothing works.
| Age | Wake window | Signs of approaching limit |
|---|---|---|
| 0–6 weeks | 45–60 min | Yawning, glazed eyes, staring |
| 6–12 weeks | 60–90 min | Eye rubbing, quieting, turning head away |
| 3–4 months | 75–120 min | Fussing, yawning, pulling at ears |
| 4–6 months | 90–150 min | Clear fussiness, arching back |
| 6–9 months | 2–3 hours | Clinginess, rubbing eyes, losing interest in toys |
| 9–12 months | 3–4 hours | Clear sleepy cues, emotional dysregulation |
The rule: start your settling routine at the first sleepy cue, not when baby is already crying. By the time a baby is crying from tiredness, the cortisol is already rising and settling will take significantly longer.
The Sleep Environment
The sleep environment sets the conditions for sleep. Each element matters:
- Darkness: A truly dark room, blackout blinds with no gaps, is the single most impactful environmental intervention. Melatonin (the sleep hormone) is suppressed by light, even dim light. Streetlights through curtains are enough to disrupt sleep. Measure and fit a blackout blind precisely.
- Temperature: 16–20°C is the European health guideline range. At this temperature, use appropriate sleep sack tog rating (2.5 TOG below 18°C, 1.0 TOG at 18–22°C). Overheating is a SIDS risk factor, a baby's chest should feel warm but not hot or sweaty.
- White noise: Effective at masking the sudden sounds that trigger the startle reflex, especially in apartments and urban environments. Keep volume below 50dB and position across the room, not in the crib. A free app works as well as a dedicated machine.
- Consistent location: Always the same place for sleep, the same crib, in the same room. Consistency signals "sleep time" to baby's developing circadian system.
The Bedtime Routine
A consistent bedtime routine works because it creates a predictable sequence that baby learns to associate with sleep onset. The sequence matters more than the specific activities. A simple effective routine:
- Bath, warm water, 5–10 minutes. Warmth followed by slight cooling mimics the body's natural sleep-onset temperature drop
- Massage or lotion, physical contact, calming touch
- Feed, the last feed of the evening in the bedroom with dim lighting
- Sleep sack / swaddle, the physical act of being wrapped becomes a sleep cue
- White noise on, another consistent cue
- Crib, same location, same position (back)
The routine should take 20–30 minutes and start at a consistent time each evening. By 8–10 weeks, most babies begin showing the first signs of responding to a bedtime routine.
Settling Techniques by Age
0–3 months: Contact settling is appropriate
Newborns are not developmentally ready for independent sleep. Contact settling, feeding to sleep, rocking, bouncing, babywearing, is entirely appropriate and not "creating bad habits." The concept of sleep associations that need breaking only becomes relevant from around 4–6 months.
- Feed to sleep: The easiest and most effective newborn settling method. Worry about associations later. not in the first 12 weeks.
- Rocking or bouncing: Replicates womb movement. A baby bouncer or rocking chair is useful here.
- Babywearing: A carrier against the parent's chest, body warmth, heartbeat, and movement often settles a baby who resists all else.
- Skin-to-skin: Regulates baby's temperature, heart rate and cortisol. Particularly effective in the first 8 weeks.
3–6 months: Beginning to introduce independent settling
From around 12–16 weeks, the circadian rhythm begins developing. This is when you can start attempting to put baby down drowsy but awake occasionally. not every sleep, not with rigid expectations, but as practice toward independent settling.
- Drowsy but awake: Put baby down with eyes open but heavy. They may fuss, pick up and resettle if needed, try again. Progress is gradual.
- Patting and shushing: Rhythmic patting on the back or bottom combined with a shush sound. Gradually reduce as baby settles.
- Pause before responding: When baby stirs at night, wait 1–2 minutes before going in. Many babies will resettle without intervention if given the chance.
6+ months: Sleep training becomes an option
From around 5–6 months and 7kg, if baby is waking frequently and has a consistent routine in place, sleep training methods can be considered. We cover all methods in detail in our guide: Baby Sleep Training Methods Compared.
When Baby Wakes at Night
Night waking is biologically normal, all humans partially wake between sleep cycles. The difference is that adults have learned to self-settle back to sleep; babies haven't yet. What looks like "waking up" is often baby at the light top of a sleep cycle needing a settling input to go back down.
The most effective single strategy for night waking: the pause. Wait 2–3 minutes before responding. Many babies at 4+ months will settle themselves without intervention if given the brief opportunity. This is not crying it out, it's observing whether baby actually needs you before responding.