What Time Should a 15-Year-Old Go to Bed? School Nights, Weekends and Summer

A 15-year-old who wakes up at 6:30 AM should go to bed around 9:15 PM, and no later than 10:15 PM. For a 7:00 AM wake-up, that's 9:45 PM, and 10:45 PM at the latest. Teens aged 13 to 18 need 8 to 10 hours of sleep a night, according to the American Academy of Sleep Medicine, and each bedtime here includes about 15 minutes to fall asleep.

These are the same numbers the kids bedtime calculator gives for a 15-year-old: a 9-hour target and an 8-hour latest. Fifteen is usually sophomore year, with heavier homework, more serious sports and, in many states, a learner's permit. This page covers school nights, weekends and summer, and why the chart can feel early.

What time should a 15-year-old go to bed on a school night?

Count back 9 hours and 15 minutes from the wake-up time for the target, or 8 hours and 15 minutes for the latest bedtime. For a 6:30 AM alarm, that's 9:15 PM and 10:15 PM.

The 9-hour column is the everyday target. The 8-hour column is the last bedtime that still meets the minimum, so it's for game nights and big tests, not every night. If your 15-year-old is still very hard to wake on 9 hours, try the earlier column for a week.

What time should a 15-year-old go to bed and wake up?

A workable school-night schedule for most 15-year-olds is lights out at 9:15 PM and up at 6:30 AM, or 9:45 PM and 7:00 AM. Both give about 9 hours of sleep.

If bedtime is the fixed point instead, add 15 minutes to fall asleep plus 9 hours to find the matching wake-up:

A 10:30 PM bedtime with a 6:30 AM alarm gives about 7 hours 45 minutes, already under the 8-hour minimum. Practice until 6, dinner at 7 and homework until 10 is exactly how that happens, so the fix is usually starting homework earlier, not cutting sleep.

Why a 15-year-old isn't tired at 9 PM

Through the mid-teens the body clock keeps shifting later, so many 15-year-olds really don't feel sleepy until well after the bedtime the chart gives. Researchers who study adolescent sleep describe sleep and wake timing moving later through the second decade of life.

A classic study followed students aged about 14 to 16 from 9th grade, with an 8:25 AM start, into 10th grade, with a 7:20 AM start. In 10th grade, the evening rise in melatonin, a marker of the body clock, came later. Students woke earlier but didn't fall asleep earlier, so they slept less and were sleepier in the morning.

That's the sophomore squeeze in one study: a later body clock and an earlier bell. What helps move the clock back:

• Bright light soon after waking. Open the blinds, eat breakfast by a window, walk or ride part of the way to school in daylight.
• Dim light in the last hour. Lamps instead of overhead lights, and screens away.
• Phones charging outside the bedroom. A shared spot in the kitchen, used by parents too, works better than a teen-only rule.
• No caffeine after lunch. An afternoon energy drink or iced coffee before practice can still be working at bedtime. The caffeine calculator shows how much is left.

What time should a 15-year-old go to bed on a weekend?

Keep weekend wake-ups within about 1 to 2 hours of school days, and bedtime 9 hours and 15 minutes before that. For a teen up at 6:30 on weekdays, sleeping until 8:00 or 8:30 on Saturday is fine.

Sleeping until noon is a different story. It moves the body clock later, so Sunday night's bedtime won't happen and Monday morning feels much worse. If Friday ran late, wake them by about 9:00 or 9:30 and let an earlier Saturday night do the catching up.

What time should a 15-year-old go to bed in the summer?

In summer, a later schedule is fine as long as it still gives about 9 hours and stays roughly the same each day. For a 9:00 AM wake-up, that's bed around 11:45 PM; for 9:30 AM, about 12:15 AM.

The catch is the end of August. A teen on a 1:00 AM bedtime and a 10:00 AM wake-up can't jump straight back to a 6:30 AM alarm. Start moving both times 15 minutes earlier every couple of days, about two weeks before school starts. A summer job, camp or preseason practice with a fixed morning start makes this much easier.

Sleep and a learner's permit

A sleepy new driver is a real risk, so a short night should mean someone else takes the wheel. The American Academy of Pediatrics lists drowsy driving crashes among the consequences of chronic sleep loss in teens.

Practice drives are best after a normal night and in daylight, not on the way home from a late game. Next year's issues, including a full license and a first job, are covered in what time should a 16-year-old go to bed, and ages 13 to 17 are side by side in what time should a teenager go to bed. The kids bedtime calculator gives the window for any other wake-up.

When to talk to a doctor

Speak to your teen's doctor if they snore loudly or seem to stop breathing in sleep, can't fall asleep for weeks at a time even with a sensible routine, or are very sleepy during the day despite enough time in bed. A body clock that runs extremely late, with sleep starting in the early hours most nights, is also worth raising.