8 Month Sleep Regression: Why Your Baby Is Sleeping Badly and What Helps

What Is the 8-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 an “8-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 8 Months?

Usually several things overlap. These are the points the sources name:

• Stranger and separation anxiety: According to the AAP, separation anxiety can cause many nights of disrupted sleep from the second half of the first year; a child may wake several times and cry for one or both parents, often preferring one. An NHS leaflet (Wirral Community Health and Care) says it may begin around 8 months and describes it as part of emotional growth: your baby needs to trust that you will come back. For 9 months, the CDC lists being shy, clingy or fearful around strangers and reacting when you leave (looking, reaching for you or crying).
• New movement skills: The CDC has no separate list for 8 months. Between its 6- and 9-month lists are steps such as leaning on hands when sitting, getting into a sitting position alone and sitting without support. By 12 months the CDC lists pulling to stand and walking while holding furniture.
• Growth spurts: The NHS leaflet names growth spurts around 6 and 9 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. Starting solids does not necessarily mean your baby will sleep through.

How much of this lands at the same time differs from baby to baby, which is why parents describe such different pictures.

My Baby Keeps Waking at Night at 8 Months. Is That Normal?

Night waking is part of baby sleep. 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. As a rough guide, Germany’s BIÖG says most babies can sleep six to eight hours at a stretch by the end of the first year, and many do. 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 8-Month Sleep Regression Last?

There is no reliable number; none of the sources we checked gives one. What is documented is this: the AAP says the separation-anxiety stage can last for several months and usually fades somewhere around the second birthday, and that in the meantime your child may need reassurance several times a night, night after night. That is not a statement about “the regression”, but it shows patience may be needed. 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 8-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.
• Practise goodbyes by day: The AAP suggests telling your child matter-of-factly when you are leaving, offering a short distraction and then going promptly. Children usually accept separations more easily when they are part of a predictable routine.
• Check wake windows: Do the gaps between sleeps still suit your baby’s day? See the 8-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 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 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 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 6-month sleep regression and the 9-month sleep regression. For every age at a glance, see our complete sleep regression guide.

Frequently Asked Questions