6 Month Sleep Regression: Why Your Baby Is Waking Again and What Helps

What Is the 6-Month Sleep Regression?

“Sleep regression” is not a medical term and not a diagnosis. Parents use it for a phase in which a baby who was sleeping reasonably well suddenly wakes more often at night, settles less easily, or fights naps. For this article we went through the information from the AAP (HealthyChildren.org), the NHS, the CDC and Germany’s BIÖG (kindergesundheit-info.de). None of them describes a “6-month sleep regression” with a fixed start or a fixed length. So you will not find a number of weeks here, only what the sources actually say about this age.

Why Is My Baby Sleeping Badly at 6 Months?

A lot changes at once around six months. These are the points the sources name:

• Sleep itself is developing: Germany’s BIÖG says a longer stretch of about six hours at a time develops by around the sixth month. The NHS says that around 6 months a baby needs fewer night feeds and may sleep up to 12 hours at night, though not every baby does.
• New movement skills: For 6 months the CDC lists, among other things, rolling from tummy to back, pushing up with straight arms and leaning on hands when sitting. Babies also put things in their mouths to explore them and reach for a toy they want.
• Growth spurts: An NHS leaflet (Wirral Community Health and Care) names growth spurts around 6 months, when babies may be clingy, fussy and unsettled, which can disrupt naps and nights.
• Teething and hunger: The NHS says teething pain and hunger can disturb sleep.
• Solids: The same leaflet says starting solids does not necessarily mean your baby will sleep through.

That all of this lands in roughly the same weeks may explain why many parents describe a dip in sleep at this age. It is not an established single cause.

My Baby Keeps Waking at Night at 6 Months. Is That Normal?

Night waking is part of baby sleep. Germany’s BIÖG says that waking at least once a night up to the sixth month is entirely normal, and that a baby may need one or more feeds at night. The NHS leaflet for 6 to 12 months says it is usual for babies at these ages to still wake for feeds during the night. A single bad night is not yet a “regression”. It is more worth your attention when sleep changes noticeably over several days and also affects mood or the daily rhythm.

How Long Does the 6-Month Sleep Regression Last?

There is no reliable number; none of the sources we checked gives one. They do not give a length for growth spurts, teething or new skills either. Such phases are usually temporary. If sleep stays poor for a long time or you are worried, talk to your pediatrician rather than waiting for a date.

Baby Sleeping Badly: What to Check First

Before assuming a sleep regression, it is worth looking at the simple causes the sources name:

• Hunger: According to the NHS, babies can wake at night because they need to be fed. Over time you learn whether your baby is really hungry or just woke up (BIÖG).
• Temperature: The NHS says being too hot or too cold can also disturb sleep.
• Teething and illness: Teething pain and illness can affect sleep (NHS).
• Diapers: Germany’s BIÖG notes that a baby does not need a diaper change after every night feed.
• Daily rhythm: Do wake windows and the evening routine still suit your baby’s age? More on that below.

If you find nothing here and sleep stays worse for several days, a conversation with your pediatrician is the next step.

What Helps With the 6-Month Sleep Regression?

• The same evening routine: The NHS suggests a simple, soothing bedtime routine with dimmed lights and little excitement just before bed, since too much stimulation can wake a child up again. Germany’s BIÖG describes a repeating evening ritual of around 30 minutes, ending with a goodnight kiss, as calming and reassuring.
• Respond calmly at night: The BIÖG advises first soothing a waking child with your voice and comfort for a few minutes instead of lifting them straight out of bed. A child does not need entertainment at night, and over time you learn whether your baby is hungry or just woke up.
• Check wake windows: Do the gaps between sleeps still suit your baby’s day? See the 6-month-old sleep schedule for an overview by age.
• Keep notes: Log sleep, feeds and diapers for a few days. It makes patterns visible and helps in a conversation with your pediatrician.

As at any age, sleep is on the back, on a flat surface, in the baby’s own sleep space (AAP).

When Should I Talk to a Pediatrician?

Talk to your pediatrician whenever you are worried. Specific prompts from the sources:

• The BIÖG advises talking to a doctor if a child shows no signs of a regular sleep-wake rhythm after the sixth month and is hard to settle.
• The AAP lists, for night waking: your baby is not growing and gaining weight steadily, is not feeding well, or has noticeably different wet or dirty diapers than usual.
• The NHS says to speak to your health visitor if your baby has problems sleeping or you need more advice about a routine.

The Neighbouring Phases

For what comes before and after, see the 4-month sleep regression and the 8-month sleep regression. For every age at a glance, see our complete sleep regression guide.

Frequently Asked Questions