8 Month Sleep Regression: Signs, How Long It Lasts & How to Fix It
As you've probably guessed by your baby's sleep refusal, there is yet another sleep regression ahead, these signs often appear suddenly, even if your baby was previously sleeping well. This is commonly known as the 8-10 month sleep regression. Now, we know what you’re thinking... "a regression that lasts 2 months?"
Don't worry, the 8-month sleep regression doesn’t actually last for 2 months, it just means that it can happen anytime between 8 to 10 months of age. And luckily, unlike the 4 month sleep regression, this one is only temporary! Most babies go through the 8 month sleep regression for around 2 to 6 weeks, although it can feel longer if sleep habits or routines shift during this time.
8 Month Sleep Regression: Quick Answers
The 8 month sleep regression usually happens between 8–10 months and is linked to rapid development like crawling and separation anxiety.
It typically lasts 2–6 weeks, but can continue longer if sleep habits change.
Common signs include:
- Waking more at night
- Refusing naps
- Increased clinginess
- Difficulty settling
The best way to improve sleep is to keep a consistent routine, use age-appropriate wake windows, and avoid creating new sleep associations.
If your baby’s sleep has suddenly changed, it’s usually not random. It’s often a schedule mismatch or developmental leap. Our Little Ones Sleep App adjusts your baby’s routine in real time, so you always know exactly when your baby should sleep.
In this article:
- What is a Sleep Regression?
- 8 Month Sleep Regression Signs
- What Causes the 8 Month Sleep Regression?
- How Long Does the 8 Month Sleep Regression Last?
- 8 Month Sleep Regression vs Nap Transition
- 8 Month Sleep Regression vs Teething
- Do Sleep Regressions Ruin Sleep Training?
- How to Fix the 8 Month Sleep Regression
- 8 Month Sleep Regression FAQs
Does this sound familiar?Your baby suddenly wakes after every short nap, settling has become harder than it was a few weeks ago, naps only last one sleep cycle and nights feel more unsettled. Our smart sleep app takes away all this guesswork, handling your baby's schedule for you to build better days and calmer nights through regression periods.
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What is a Sleep Regression?
A sleep regression is a period when a baby or toddler who has been sleeping well suddenly starts waking at night, being difficult to settle and/or skipping naps. This is a natural and normal change for your baby, but it can be a distressing time for parents.
Your baby will go through a number of sleep regressions in the first 2 years of their life, which you can find out more by reading our Baby Sleep Regression Ages: What to Expect at 2, 4, 8, and 18 Months
A key part of moving through these sleep regressions successfully is understanding what causes them, and what’s happening with your baby at this time.
8 Month Sleep Regression Signs
The main signs that your little one is going through a regression is that their sleeping pattern takes a turn for the worse, but some specific signs to look out for include:
- Waking more in the night and staying awake for ages - especially in the middle of the night
- Increased fussiness
- Your baby can no longer self-settle or resettle between sleep cycles like they did previously
- Refusing to nap
- Crying or protesting when settling at naps or at bedtime
- Increased separation anxiety
- Your baby is reaching new milestones like crawling, pulling to stand, walking, talking etc.
What Causes the 8 Month Sleep Regression?
As we mention in our sleep regression article, regressions are developmental phases that all babies go through. The 8 to 10 month sleep regression is tied to developmental milestones like crawling, standing, and making new sounds.
Physical Development
Between 8-10 months of age your baby is going through a massive period of neurological and physiological development. They’ll be learning to crawl, pulling to stand and finding their voice, amongst other things. Your little one is a busy bee, this means they will often want to wake in the night to practise their new skills!
They can also be too stimulated to fall asleep easily. Picture this - you’ve just come out of a long meeting where you've have had to take in a whole heap of new information and you try going to sleep straight afterwards. More than likely, it isn’t going to happen because your brain is far too stimulated and busy trying to process everything you've learned that day. The same goes for our babies!
Mental Development
Your little one is now much more alert and aware of their surroundings and may also start experiencing separation anxiety.
At this age, babies can start to tell one adult from another and have also developed the concept of object permanence. Object Permanence is the understanding that objects continue to exist even when they cannot be perceived (seen, heard, touched, smelled or sensed in any way.)
In the earlier months of your baby’s life, you may have noticed that your wee one liked to play peek-a-boo. This is because, in their minds, once you disappeared from their line of sight, you quite literally vanished and then re-appeared again - the best trick in the book!
For older babies though, this is no longer the case. Now, you may notice that your little one becomes clingier and cries when you leave them. This is because when you leave them, they now understand that you're still there somewhere, just out of their sight, and naturally, they want you to be with them instead!
How Long Does the 8 Month Sleep Regression Last?
So you’ve gone through the trials and tribulations of the 4 month sleep regression and you’ve made it out the other side, but now you’ve been faced with yet another regression! This sleep regression typically lasts a few weeks, on and off, but can persist if new sleep habits or associations are formed, in which case it can last a lot longer! A sleep association is something that your baby comes to rely on to fall asleep you can read more about sleep associations in our article Sleep Associations: What is all the fuss about? .
During this regression your baby may be more difficult to settle, so it's very easy to start patting, rocking or feeding your little one, to help them fall asleep. In just a few days though, your baby can come to rely on that method to fall asleep and will now need that sleep association replicated every time they wake between cycles.
In this situation, you'll need to gently guide your little one back to self-settling again before their sleep can improve.
If this phase is dragging on longer than a few weeks, it’s usually a sign your baby’s schedule needs adjusting. This is where many parents get stuck. Our Sleep App removes the guesswork by giving you a personalised daily routine based on your baby’s age and stage.
Need a little extra support through this regression?Sleep regressions are a normal part of development, but having a clear plan for naps, feeds and settling can make them much easier to navigate. Our smart sleep app takes you through exactly what to do to get back to good sleep ASAP, without the guesswork.
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8 Month Sleep Regression vs Nap Transition
Somewhere between 6-8 months old your baby should transition from 3 naps a day, down to 2. During this period, your baby may have difficulty settling at bedtime or start to wake more overnight, as they adjust to their new sleep pattern.
If your baby is still having 3 naps a day and their sleep suddenly takes a turn for the worse between 8-10 months of age, chances are they are ready to drop their third nap now. You can find out more about this nap transition, and how to help your baby through it in our article about the 3 to 2 nap transition.
8 Month Sleep Regression vs Teething
Teething often gets the blame for a baby's sleep challenges but the truth is, teething is usually a short lived nightmare! Unless you can actually see or feel the teeth breaking through the gums, teething probably isn't the cause of any sleep disruption for your little one - especially if it's been going on for more than a week.
Do Sleep Regressions ‘Ruin’ Sleep Training?
The answer is not at all! Now, just to clarify, by "sleep training" we mean establishing a consistent nap routine for your baby and guiding them towards the skill of self-settling when they are ready.
Establishing a consistent routine and positive sleep habits early on is well worth the effort because it can actually help you and your baby through tricky periods like sleep regressions and nap transitions. You'll be able to quickly identify when something like a sleep regression is occurring because you will easily recognise the changes in your baby’s sleeping habits.
During a regression it can be a little more tricky to follow a routine or schedule, but making sure your baby's awake windows and nap lengths are spot on for their age will help a lot when it comes to their settling and sleep.
Our sleep app does the thinking for you, with age-appropriate patterns, adaptive schedules customised to your unique baby and easy ways to adjust when things shift, so that daytime sleep supports the circadian rhythm and peaceful nights.
How to Fix the 8 month Sleep Regression
We know it probably feels like it’s just one regression after another, but it helps to remember these are natural developmental periods in your baby’s life that are necessary for their growth and development.
Yes, the 8 month regression can be tough, but you've already pulled through the 4 month regression (which is no easy feat!) and there are plenty of things that you can do to help you and your little one through this regression as well:
- Remember that this is just a short phase and it will be over in a matter of weeks
- Try to avoid creating new sleep habits/associations that will be hard to shake off later
- Stick to your routine as best you can and make sure your baby's naps and awake times are age-appropriate. Our Sleep App can give you a helping hand with this!
- Sleep your baby in a totally dark room, with white noise playing.
- Have a consistent and relaxing bedtime routine in place.
- Support and reassure your baby, but continue to give them the chance to self-settle.
- Allow for lots of physical and mental stimulation during their awake time in the day.
- Too much stimulation before bed can make it hard for your baby to fall and stay asleep, even if they're tired.
Sleep regressions don’t have to turn into long-term sleep struggles. With the right timing, routine and support, your baby’s sleep can settle quickly again.
If you want a clear plan tailored to your baby, our Little Ones Sleep App will guide you step-by-step, helping you reduce night waking, improve naps and get back to settled nights faster.
8 Month Sleep Regression FAQs
How long does the 8 month sleep regression last?
The 8 month sleep regression typically lasts 2 to 6 weeks. It can last longer if your baby’s sleep routine or habits change during this time.
What are the signs of the 8 month sleep regression?
Common signs include increased night waking, refusing naps, difficulty settling, and increased clinginess or separation anxiety. These changes often happen suddenly, even if your baby was sleeping well before.
Why is my 8 month old suddenly waking at night?
Night waking at this age is usually caused by developmental milestones, increased awareness, or separation anxiety. Changes to your baby’s schedule or sleep habits can also play a role.
Will the 8 month sleep regression pass on its own?
Yes, the 8 month sleep regression will pass, but sleep doesn’t always return to normal on its own. If routines or sleep habits change during this phase, your baby may continue waking or struggling to settle, which is why having the right schedule and support can make a big difference.
Bibliography
The following sources inform the sleep science discussed in this article and reflect current research into infant sleep development and regression patterns.
American Academy of Sleep Medicine (AASM). Child Sleep Duration Health Advisory. American Academy of Sleep Medicine.
HealthyChildren.org, American Academy of Pediatrics (AAP). Separation Anxiety & Sleeping Trouble in Young Children.
HealthyChildren.org, American Academy of Pediatrics (AAP). How to Ease Your Child’s Separation Anxiety.
Centers for Disease Control and Prevention (CDC). Important Milestones: Your Baby By Nine Months
NHS. Baby Teething Symptoms.
Welsh Medicines Information Centre, NHS Wales. Teething v3.
