How much sleep does a teenager need?

Most teenagers need somewhere between eight and ten hours of sleep a night. That is the broad consensus across sleep-medicine bodies for the 13-to-18 age range, and it is more than most teenagers actually get. But how much sleep a teenager needs is a guide, not a quota to measure yourself against every morning, and the gap between the number and the reality usually has far less to do with laziness than with biology.

A quick word on who this is for. You might be the teenager reading this late, wondering why sleep will not come, or the parent watching the light under a door at midnight. Either way the useful move is the same: understand what is going on before you try to fix it.

How much sleep should a teenager get?

The short answer to how much sleep teenagers need is about eight to ten hours for ages roughly thirteen to eighteen. Younger adolescents tend to need a little more, closer to nine to eleven. That figure is a sleep-medicine consensus and an average across a population, not a law your body is failing to obey.

Here is why the distinction matters. If you treat how long a teenager should sleep as a nightly target of exactly eight hours, you have already built the problem. Sleep need varies between people, and it varies within one person from night to night. Some teenagers do well on eight. Some genuinely need closer to ten. A number that becomes a source of pressure stops being information and starts being a stick.

So use the range as a rough map. When someone asks how much a teenager should sleep, the truest answer is: enough that they wake reasonably refreshed and get through the day without falling asleep in class, whatever the clock says.

Why teenagers are wired to sleep later

This is the part most sleep advice skips, and it matters more than any tip. During puberty the adolescent body clock shifts later. The brain begins releasing melatonin, the hormone that signals night, an hour or two later than it did in childhood. This is a real, well-recognised biological change, not a habit and not defiance. A teenager who cannot fall asleep until midnight is often doing nothing wrong; their internal night simply starts later, a shift in the adolescent body clock that puberty brings on its own.

Now layer the world on top of the biology. School starts early. Homework, screens, sport, and friends push bedtime back. The clock says sleep, the body says not yet, and the alarm goes off at seven regardless. The result is a teenager carrying a sleep debt on a schedule never built for their physiology.

Most of the time, that is the whole story: a mismatch between a late body clock and an early schedule, not a disorder. Understanding that alone takes a lot of the fear out of it.

Not enough sleep, or a sleep problem?

There is a difference between a teenager who is not getting enough sleep and one who cannot sleep even when the chance is there. They need different responses, so it is worth telling them apart. Parents often ask how much sleep teenagers should get and assume the answer is just a number; the more useful question is whether the teenager can sleep when given the chance.

Not enough opportunity looks like this: given a free morning, the teenager sleeps long and wakes fine. The tank fills when the schedule allows. That is a scheduling problem, and it eases with a later start, lighter evenings, and time.

Sleeplessness in a teenager that has become a genuine problem looks different. Here the teenager lies awake wanting to sleep, trying to sleep, and the trying keeps them up. When a teenager can't sleep night after night and starts to dread the bed, a second layer has landed on top of the biology: arousal about sleep itself.

This is the loop I spend most of my time on, because it does not fix itself. The more sleep is treated as a problem to solve in the moment, the more alert the brain becomes at the worst possible time. Sleep is the one domain where trying harder makes the outcome worse. That is as true at fifteen as it is at fifty. If that sounds familiar, our overview of how insomnia works goes into the mechanism more deeply.

What actually helps when a teenager can't sleep

Start with the ordinary conditions: a fairly steady wake time, morning light, a wind-down that is not a bright screen six inches from the face, and an evening that is not wall-to-wall stimulation. This is sleep hygiene, and it is worth doing.

But I want to be honest about what hygiene is and is not. It is the floor, not the cure. The clinical guidelines are clear: the American Academy of Sleep Medicine reviewed the evidence and recommends against sleep hygiene as a standalone treatment for persistent insomnia (Edinger et al., 2021). It sets the conditions. It does not, by itself, switch off a brain that has learned to be alert in bed.

When sleeplessness has become self-maintaining, the strongest evidence points to a structured behavioural approach. In adults, cognitive behavioural therapy for insomnia is the recommended first-line treatment, ahead of medication (Qaseem et al., 2016), and a meta-analysis of twenty trials found it meaningfully shortens the time taken to fall asleep and the time spent awake at night, with gains that hold at follow-up (Trauer et al., 2015). I will flag the obvious: most of that evidence is in adults, and the adolescent research base is smaller, so read it as a well-founded direction rather than a settled prescription for teenagers.

That evidence base is the foundation the Insomnia Reset program is built on, and then adapts. One example of the adaptation: I do not ask people to keep a nightly sleep diary. For an already watchful mind, logging every night tends to feed the very hypervigilance we are trying to lower. The aim is less monitoring, not more.

Notice what is not here: no stack of five new nightly tasks. Good sleep help is subtractive. You remove the effort that fuels the arousal, not add another job before bed.

A word on melatonin and medication

Parents often ask about melatonin. I will not give doses or schedules, because that is genuinely a conversation for a prescriber who knows the teenager, and melatonin in a developing body deserves particular care. The honest general point: in adults, when insomnia is treated with therapy first, the benefits last better over two years than medication does (Morin et al., 2009). Medication may still have a place, and that decision belongs with the young person, their family, and their doctor, not with a blog.

When to check in with a GP

Most teenage sleep trouble is biology and schedule, and it settles. Some of it deserves a closer look, so no one spends months on the wrong tool. See a GP if a teenager snores loudly and seems to gasp or stop breathing in sleep, is overwhelmingly sleepy by day despite enough time in bed, falls asleep suddenly at odd moments, or if poor sleep sits alongside a low, anxious, or hopeless mood. These are not things to diagnose from an article; they are reasons to get assessed.

One plain safety note: a very sleep-deprived teenager should not be driving. Drowsiness at the wheel, especially for a new driver, is a real risk.

None of this means a rough patch of sleep is harming your teenager. One bad stretch is a bad stretch. It is not evidence of anything permanent. If you want a clearer read on whether this is ordinary short sleep or the start of a stuck pattern, the Sleep Clarity quiz is a calm place to begin.

Common questions

How much sleep does a 13-year-old need?

A thirteen-year-old sits at the start of the teenage band, so about eight to ten hours is the usual guide, and many at that age do well nearer the top of it. Treat it as a range, not a target. Waking reasonably refreshed and getting through the day matters more than the exact number.

Is it normal for a teenager to sleep more than ten hours?

Often, yes, especially after a run of short nights or during a growth phase. A long weekend sleep is usually the body clearing a backlog. If a teenager sleeps very long every day and still feels exhausted, that is worth mentioning to a GP.

Why can't my teenager fall asleep until the early hours?

Usually because their body clock has shifted later, which is normal in adolescence, while their schedule has not shifted with it. When a teenager can't sleep until 1am but sleeps soundly once they do, that points to timing rather than a disorder. Morning light and a steadier wake time help nudge the clock earlier.

How do I know if it is more than just not enough sleep?

The tell is effort. If a teenager has the chance to sleep, wants to, and still lies awake night after night dreading it, the problem has moved from schedule to arousal. That is the pattern worth addressing directly, and it responds to the right approach rather than to trying harder.

Frequently asked questions

How much sleep does a 13-year-old need?

A thirteen-year-old sits at the start of the teenage band, so about eight to ten hours is the usual guide, and many at that age do well nearer the top of it. Treat it as a range, not a target. Waking reasonably refreshed and getting through the day matters more than the exact number.

Is it normal for a teenager to sleep more than ten hours?

Often, yes, especially after a run of short nights or during a growth phase. A long weekend sleep is usually the body clearing a backlog. If a teenager sleeps very long every day and still feels exhausted, that is worth mentioning to a GP.

Why can't my teenager fall asleep until the early hours?

Usually because their body clock has shifted later, which is normal in adolescence, while their schedule has not shifted with it. When a teenager can't sleep until 1am but sleeps soundly once they do, that points to timing rather than a disorder. Morning light and a steadier wake time help nudge the clock earlier.

How do I know if it is more than just not enough sleep?

The tell is effort. If a teenager has the chance to sleep, wants to, and still lies awake night after night dreading it, the problem has moved from schedule to arousal. That is the pattern worth addressing directly, and it responds to the right approach rather than to trying harder.