The 18 Month Sleep Regression: Why It Happens & How to Get Through It
Welcome to the 18 month sleep regression, a phase that turns sweet bedtime routines into what feels like a midnight circus. If your once-sound sleeper is now boycotting naps or waking up multiple times a night, you’re not alone. This developmental shift is real, it's frustrating, and yes, it will pass.
Let’s walk through what causes the 18 month regression, how long it tends to last, and what you can do to help everyone in your house get back to more restful nights.
What Is the 18 Month Sleep Regression?
Sleep regressions are those surprise detours in your toddler’s sleep journey where everything you thought was working… suddenly isn't. At 18 months, big changes in development and emotions can disrupt sleep patterns.
Your toddler might be mastering new words, running instead of walking, or testing independence. All that stimulation can lead to:
Shorter or skipped naps
Frequent night wake-ups
Increased bedtime resistance
Not every child will hit all the bumps, but if your toddler is suddenly clingy, restless, or waking more often, this phase could be the culprit.
Why Does the 18 Month Regression Happen?
Developmental Growth Spurts
At 18 months, toddlers are in overdrive developmentally. They're picking up new vocabulary, exploring the world more independently, and starting to express big emotions. That whirlwind of learning can make it hard for their brains to wind down.
Emotional Changes & Separation Anxiety
Your toddler's growing awareness often comes with heightened sensitivity. Bedtime separation can feel more intense, leading to crying, clinging, or waking up just to check if you’re still there.
Physical Discomfort
Teething, minor illnesses, or even the fear of the dark can add to sleep disruptions. These discomforts, although normal, can make restful nights harder to come by.
How Long Does Sleep Regression Last?
The 18 month regression typically lasts between two to six weeks.
If you're wondering, how long does sleep regression last? It depends. A consistent bedtime routine, calm sleep environment, and gentle responses can help your child find their rhythm again.
Keep an eye out for signs of improvement like:
Falling asleep faster
Fewer night wakings
Less resistance at nap or bedtime
Those small wins mean you’re on the upswing.
Tip: If you’re struggling to spot progress, our Sleep Encyclopedia has additional guides for every stage.
Signs Your Toddler Is in the 18 Month Sleep Regression
Not sure if it’s regression or just a rough patch? Here are a few common signs:
Increased night waking: Even previously solid sleepers may suddenly wake frequently.
Nap refusals or early waking: Your child might resist naps or wake up far too early.
Clinginess and separation anxiety: Especially noticeable at bedtime.
Stalling and sleep resistance: Requests for "one more story" or extra hugs might become nightly rituals.
Even previously solid sleepers may suddenly wake frequently, sometimes staying awake for long stretches it’s a classic sign of split nights.
How to Support Your Toddler Through the Regression
While this phase can be tough, there are gentle ways to help your child (and you) rest easier.
Reassess Their Sleep Balance
As they grow their overall sleep needs reduce, so we need to adjust when they sleep across their day. Think:
Do they have enough consistent awake time
Do they need their nap shortened
Does bedtime fall too early to achieve the desired wake up time
Create a Calming Sleep Environment
A consistent, cozy setting helps set the tone. Think:
Blackout curtains or dim nightlights
White noise for comfort
Favorite sleep items like a blanket or soft toy
If teething or illness is in the mix, add extra comfort: warm baths, soothing music, or gentle rocking can work wonders.
Stick to Predictable Routines
Toddlers thrive on predictability. Establish a bedtime and nap routine that flows the same way each day. It might look like:
Bath
Pajamas
Books
Snuggles
Lights out
Even if they protest, your calm consistency builds trust and cues the body for rest.
Support Their Growing Independence
Offer small choices like "this book or that one?" and practice brief separations during the day so they feel safer when apart at night. If they suddenly want to co-sleep or be rocked to sleep, respond with empathy but stick to sleep habits you’re comfortable maintaining long term.
When to Ask for Extra Help
Talk to Your Doctor
If sleep issues persist for weeks without signs of improvement, or you notice other concerns (like mood, eating, or growth changes), check in with your healthcare provider to rule out medical causes.
Consider a Sleep Consultant
Sometimes a bit of personalized guidance can make all the difference. At Woodlands Collection, our experienced team creates tailored sleep plans that suit your family’s unique rhythm and values. Whether you need a quick consult or more hands-on support, we’re here for the long nights and better mornings. If you have any questions read our article on when it’s best to hire a consultant.
Did you know? Our sleep services may be covered under your extended health benefits in BC, Ontario, and Alberta. Book a call today.
Hope for the Sleep-Deprived
The 18 month sleep regression might feel like it will never end, but it absolutely will. With patience, consistency, and a little creativity, your toddler will find their way back to better sleep.
And if you ever feel stuck, overwhelmed, or just want a friendly expert to walk the path with you, you’ve stumbled into the right Woodlands.
Let’s find your family’s sleep sweet spot because restful nights aren’t just a dream.