Teens ages 13 to 18 are generally advised to get 8 to 10 hours of sleep per 24 hours on a regular basis. That is a population health recommendation, not a test that diagnoses a problem after one short night or proves that every teen needs the same number 1.
A useful sleep plan starts by finding out whether the teen has too little opportunity to sleep, a later body-clock schedule that conflicts with required wake times, or symptoms of a sleep, mental-health, medication, or substance-related problem. Those situations can look similar in the morning, but they do not have the same solution.
How much sleep does a teen need?
The American Academy of Sleep Medicine (AASM) recommendation is:
| Age | Recommended sleep per 24 hours |
|---|---|
| 6 to 12 years | 9 to 12 hours |
| 13 to 18 years | 8 to 10 hours |
The 13-to-18 range includes sleep across the whole day, including a nap. A 12-year-old is still in the 9-to-12-hour age group in this consensus statement 1.
The range is a planning target. It does not mean that 7 hours and 59 minutes is a medical emergency or that spending 9 hours in bed guarantees 9 hours asleep. Look at the pattern over time and at daytime function. Regularly falling asleep in class, needing repeated wake-up attempts, or being unsafe while driving matters even if a tracker reports a seemingly acceptable number.
Needing much more sleep for a few days after a demanding week may reflect recovery. Persistently sleeping far longer than usual, remaining very sleepy despite enough opportunity, or having a sudden change from the teen's usual pattern deserves assessment rather than a stricter alarm.
Why teen sleep often shifts later
Sleep timing commonly moves later across puberty. Research describes two interacting changes: the circadian timing system tends to favor later sleep and wake times, and sleep pressure may build more slowly across the day in more mature adolescents. Evening light, school schedules, activities, homework, jobs, caregiving, social life, and personal routines can push timing later still 2.
This biology is real, but it does not make earlier sleep impossible for every teen. It also does not make late sleep a character flaw. The size and timing of the shift vary, and biology interacts with the teen's environment.
Early required wake times can shorten sleep when bedtime moves later. The American Academy of Pediatrics identifies early school starts as one modifiable contributor, alongside biological, academic, and lifestyle factors 3. Our guide to later school start times examines that policy question in detail.
A large gap between school-day and free-day timing is sometimes called social jetlag. Sleeping later on free days can help repay some lost sleep, but a large shift may also make the next early night and morning harder. The answer is not to forbid recovery sleep. It is to protect more sleep on required days where possible and avoid changing the schedule more than the teen can comfortably reverse.
Build a schedule around the real constraint
A family can use this as a starting plan, then change one or two things at a time.
1. Start with the required wake time
Work backward from school, transport, practice, work, or another nonnegotiable start. Protect enough time for the teen to obtain roughly 8 to 10 hours, allowing for a realistic wind-down and time to fall asleep. If the calculation produces an unworkable bedtime, the schedule itself needs attention.
List what is taking the evening: homework, commuting, practice, a job, household responsibilities, caregiving, gaming, messaging, or time alone. A plan that ignores the actual constraint usually becomes another rule the teen cannot follow.
2. Use a workable wake-time anchor
A reasonably steady wake time can help keep timing from drifting later. It does not have to be identical every day. After a short week, some extra sleep may be useful. If a large weekend shift repeatedly makes Sunday night and Monday morning difficult, test a smaller shift and look for another way to protect sleep during the week 2.
Get outdoor light after waking when practical, and make the period before planned sleep dimmer. Light is one of the signals that helps set circadian timing. If a teen has a persistently delayed schedule, the timing of light and other treatment matters, so a clinician should guide a formal phase-shifting plan 24.
3. Address screens by what they are doing
Screens can affect sleep by using time that would otherwise be available for sleep, keeping a conversation or activity going, delivering notifications, and exposing the eyes to light. The size of the effect is not the same for every person or every type of use.
A 2026 meta-analysis of day-to-day data found a small association between more screen use and later sleep onset, but no significant association with total sleep time, sleep efficiency, or several other sleep measures. Screen use after bedtime had a stronger relationship with reported sleep quality than daily or general evening use. Most included participants were adolescents, but the studies were short and many relied on self-report 5.
That evidence does not support blaming every sleep problem on a phone. It supports checking whether use in bed is delaying sleep on this teen's difficult nights. The teen might choose a last-task time, enable do-not-disturb, silence selected notifications, move highly engaging use earlier, or charge the phone farther from reach. A separate alarm can help if the phone keeps returning to bed. Our guide to screen time and insomnia in teens covers this question more fully.
4. Find caffeine and energy drinks
Caffeine may be present in coffee, tea, soda, energy drinks, chocolate, supplements, pouches, and some medicines. Its duration and effects vary. The American Academy of Pediatrics says avoiding caffeine is the best choice for children and teens and warns that energy drinks can deliver large doses plus other stimulants 6.
Do not apply the adult 400-milligram ceiling as a teen target. If caffeine is part of the day, record the product, amount, and time. Moving it earlier or reducing it can show whether it is contributing. A teen who uses caffeine daily may get headaches or irritability when stopping abruptly, so a gradual plan may be easier 6. Ask a clinician or pharmacist about caffeine in prescribed or over-the-counter medicines rather than changing those medicines independently.
5. Use naps intentionally
A nap can be a reasonable response to sleep loss or a safety need. It can also reduce sleep pressure and delay nighttime sleep for some teens. If a nap helps daytime function without affecting nighttime sleep, it may fit. If bedtime keeps moving later, test an earlier or shorter nap rather than imposing one universal nap rule 2.
6. Keep activity, but test the timing
Regular movement belongs in a healthy week. There is no need to ban all evening exercise. If a late, intense practice consistently leaves a particular teen alert at bedtime, see whether timing, the post-practice routine, or another part of the schedule can change. Athletes also need to count travel, meals, showering, and recovery when calculating sleep opportunity.
7. Make the plan with the teen
Ask what is hardest, what they want to improve, and which change feels realistic. Choose a small experiment and review the result together. This works better as shared problem-solving than as surveillance, punishment, or a parent-versus-teen contest.
A simple two-week record can include estimated sleep time, wake time, naps, caffeine, major schedule constraints, and daytime sleepiness. It does not need minute-by-minute phone monitoring or a sleep-stage score.
Not enough sleep, insomnia, or another condition?
Being tired does not reveal the cause. These patterns can help organize the next conversation, but they cannot diagnose a teen:
| Pattern | Clues that make it worth considering |
|---|---|
| Insufficient sleep opportunity | The schedule leaves too little protected time, and sleep tends to lengthen when the constraint is removed. Sleeping longer on free days supports this possibility but does not prove it. |
| Insomnia | There is adequate time and circumstances for sleep, but repeated trouble falling asleep, staying asleep, or waking too early causes distress or daytime impairment 7. |
| Delayed sleep-wake phase disorder (DSWPD) | Sleep and waking are persistently later than required, sleep is generally more normal when the preferred schedule is allowed, and the mismatch causes meaningful impairment. This is more than preferring a late bedtime 4. |
| Obstructive sleep apnea | Regular snoring plus gasping, observed pauses, labored breathing, morning headaches, difficult waking, or daytime problems warrants evaluation. The AAP recommends a sleep study or specialist referral when a child or adolescent regularly snores and has signs or symptoms of OSA 8. |
| Restless legs syndrome | An urge to move the legs begins or worsens at rest, improves temporarily with movement, and is worse in the evening or at night. Children and teens may struggle to describe the sensation 9. |
| Narcolepsy or another central hypersomnolence disorder | Irresistible sleep episodes despite adequate opportunity or sudden emotion-triggered muscle weakness need specialist assessment. Recurrent sleep paralysis or vivid experiences at sleep-wake transitions are more informative when they occur with severe daytime sleepiness. Not everyone with narcolepsy has every feature 10. |
| Depression or anxiety | Sleep may become shorter, longer, or more irregular alongside persistent sadness, loss of interest, hopelessness, hard-to-control worry, withdrawal, or a clear decline in daily function. Sleep symptoms alone do not diagnose a mental-health condition 1112. |
| Possible mania or psychosis | Sleeping far less without feeling tired, together with unusually high energy, rapid speech, racing thoughts, marked irritability, or risky behavior is different from wanting sleep but being unable to get it. Hallucinations while fully awake, severe confusion, paranoia, or difficulty telling reality from fantasy need prompt assessment 1314. |
| Medicine or substance effects | Caffeine, nicotine, alcohol, cannabis, stimulants, sedating substances, decongestants, and other medicines can change sleep or alertness. Timing, dose changes, withdrawal, and combinations matter. Do not stop a prescribed medicine without the prescriber 7. |
Sleep paralysis or a vivid image while falling asleep or waking is not the same as hallucinations while fully awake. It can occur by itself or with narcolepsy. The timing, daytime sleepiness, and other symptoms help a clinician interpret it 10.
For a wider overview, see sleep disorders in children and teens. A clinician may use the history and sleep record, examine the teen, review medicines and substances, or order targeted testing. A sleep study is central to evaluating suspected OSA and may answer other selected questions, but it is not a routine test for every late bedtime or insomnia complaint 87.
What insufficient sleep can affect
Regular sleep in the recommended range is associated at a group level with better attention, learning, behavior, emotional regulation, mental and physical health, and fewer injuries. Much of this literature is observational, so it does not mean one short night causes a disorder or that adding sleep guarantees a particular outcome 1.
Controlled research can answer narrower questions. In a randomized crossover study, healthy adolescents reported worse mood after a week of restricted sleep than after a healthier sleep schedule, and parents also noticed poorer emotion regulation 15. That supports taking an irritable, sleepy week seriously without treating sleep as the only possible cause of a major mood change.
Claims about grades need similar care. A meta-analysis of 14 observational studies in U.S. adolescents found a negligible, nonsignificant pooled correlation between sleep duration and academic performance and a negligible correlation with sleep quality. Measures and definitions differed across studies 16. Sleep supports the ability to learn and participate, but hours of sleep cannot predict one student's grades independently of health, teaching, stress, resources, attendance, and many other factors.
Sleepiness has a clearer immediate safety implication. It can impair alertness, reaction, and judgment while driving. If a teen may fall asleep at the wheel, they should not start or continue driving. Arrange another ride or stop somewhere safe. Caffeine or an energy drink does not make severe sleep deprivation safe 17.
When to seek help
Arrange a routine visit with a pediatrician, family clinician, sleep clinician, or appropriate mental-health professional when:
- trouble falling asleep, staying asleep, waking on time, or staying awake persists despite enough opportunity
- sleepiness affects school attendance, driving, work, sports, or daily safety
- there is regular snoring, gasping, labored breathing, or witnessed pauses
- there are irresistible sleep episodes, emotion-triggered weakness, or repeated unusual sleep-wake experiences
- uncomfortable legs repeatedly interfere with rest
- mood, anxiety, substance use, or a medicine may be involved
- the teen routinely needs much more sleep than expected and still feels unrefreshed
Use urgent mental-health or emergency care if the teen may harm themselves or someone else, cannot stay safe, has severe agitation or confusion, has hallucinations while fully awake, or has a striking reduction in sleep need with escalating energy or risky behavior 111314.
Call local emergency services if someone is unresponsive, cannot breathe, or is not breathing normally 18.
The bottom line
Most teens need 8 to 10 hours of sleep per 24 hours, but the useful question is not only “What bedtime should we enforce?” It is “What is limiting sleep or making the teen unable to sleep or stay alert?”
Protect enough opportunity, account for later adolescent timing, and change the constraint that is actually operating. When sleep stays difficult or daytime sleepiness is severe, look beyond habits and involve a clinician.
