8 Month Sleep Regression: Why It Happens and What Helps
In this guide
Your baby is crawling, babbling, pulling themselves up on the furniture. They’re changing every day. And suddenly, nights you thought were behind you are back: crying at bedtime, waking at 2 am, standing up in the crib and refusing to lie down.
This is often called the 8 month sleep regression. It’s a sign of a busy, growing brain, and it usually passes.
The short answer: around 8 to 10 months, many babies sleep worse for a while because of big developmental changes: separation anxiety, crawling and pulling up, teething and changing nap needs. It’s usually short-lived. Keep routines steady, give practice time for new skills during the day, and reassure without starting new habits you don’t want to keep.
What causes the 8 month sleep regression?
There’s rarely one cause. Several big changes tend to arrive together.
Separation anxiety. Babies now understand that you still exist when you leave the room, and they want you back. The American Academy of Pediatrics notes that separation anxiety can start as early as 4 to 5 months, with most babies developing stronger anxiety around 9 months. Bedtime is a separation, so it’s often where this shows up first.
New motor skills. Crawling, sitting and pulling up to stand are exciting. Many babies practice in the crib, get stuck standing, and can’t work out how to lie back down.
Teething. Teeth can come through at any point in the first year, and sore gums can disturb sleep.
Changing nap needs. Around this age, many babies are ready to move from 3 naps to 2. Too much day sleep can push into the night, and too little can lead to overtiredness.
More awareness of the world. Everything is more interesting now, which can make winding down harder.
Signs of the 8 month sleep regression
- Crying or fighting sleep at bedtime when it used to be easy
- More night wakings, sometimes with standing or crawling in the crib
- Wanting you in the room, and protesting when you leave
- Short or refused naps
- Early morning waking
According to the Sleep Foundation, these regressions are usually short-lived, and not every baby has one.
What helps
Practice new skills in the daytime. Lots of floor time for crawling, and practice going from standing back to sitting (hold their hands and guide them down). Once a skill is mastered during the day, the crib becomes less of a gym.
Keep the bedtime routine steady and warm. The same short sequence every night: bath or wash, sleep sack, milk, a book, a song, lights out. Predictability is reassuring when separation feels big.
Practice short separations by day. Peekaboo, leaving the room for a moment and coming back, a consistent goodbye phrase. These little games teach your baby that you always return.
Reassure, then keep it boring. If your baby wakes or stands in the crib, go in calmly, lay them back down, offer a few words and a pat, and keep the light off. You can wait a couple of minutes first to see if they resettle.
Check the wake windows. At 7 to 9 months, a typical wake window is about 2 hours 15 minutes to 3 hours. Sleep problems at this age are often a sign that naps need re-timing. Our wake windows by age chart can help.
Help sore gums. A cold (not frozen) teething ring or gently rubbing their gums with a clean finger can help before sleep. Ask your pediatrician about pain relief if teething seems to hurt.
Keep sleep safe. Once your baby can pull up, lower the crib mattress to its lowest setting and keep the crib clear of bumpers, pillows and toys.
How long does the 8 month regression last?
For most babies, from a few days to a few weeks. It often eases as a new skill is mastered or a nap transition settles.
A sleep log is the best way to see the end coming. When every night blurs together, it’s hard to tell if things are improving. Napling shows the week at a glance, so you can see total sleep recovering even when last night felt rough.
When to call your pediatrician
Check in with your pediatrician if sleep problems last a long time or keep getting worse, if your baby has a fever, seems in pain or unwell, is feeding much less or has fewer wet diapers, or breathes unusually during sleep.
Quick answers
Is there a 6 month sleep regression too? Some babies have a rough patch around 6 months, often tied to rolling, sitting or teething. The same steady approach helps.
My baby stands in the crib and cries. What do I do? Lay them back down calmly, then practice standing and sitting down together during the day.
Will sleep training fix the 8 month regression? Some families choose sleep training around this age. It’s worth talking it through with your pediatrician, and waiting out any illness or teething first.