What time should a 13 year old go to bed?

Last reviewed: 14 September 2026

Thirteen is where the guidelines change band — and where the gap between what teenagers need and what they get becomes a genuine health issue.

Bedtime chart for a 13-year-old

Find the time your teenager has to be up, and read across. These bedtimes are lights out, not the start of the evening — they already include about 15 minutes to fall asleep, which is a typical figure at this age.

If your 13-year-old wakes on their own at roughly the right time and is cheerful for the first twenty minutes of the day, the bedtime you are using is working. If they need waking every morning, it is too late — whatever the chart says.

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

A 13-year-old needs 8 to 10 hours of sleep a night. The major guidelines agree closely, and all of them give a range rather than a number because healthy teenagers genuinely vary by an hour or more either side.

The teenage body clock is not laziness

During puberty the circadian clock shifts later by one to two hours, and it does so involuntarily. A 13-year-old who is wide awake at 10:30 PM and comatose at 7:00 AM is not being difficult — melatonin release has moved, and the body is running on a timetable that no longer matches the school day. This delay persists through the teenage years and only reverses in the early twenties.

The consequence is a structural mismatch: school starts at a time that suits a 9-year-old's clock, for a body running on a 13-year-old's. Averaged across a term, that produces a chronic deficit that shows up as low mood, poor concentration, worse memory consolidation and a measurably higher risk of anxiety and depression — effects that are far better documented than most parents realise.

What actually shifts a teenage clock earlier

• Morning light is the strongest lever. Fifteen to thirty minutes of daylight within an hour of waking. Walking part of the journey to school beats any amount of evening effort.
• A consistent wake-up time, including weekends, within an hour of the school time. The Saturday lie-in until noon is what makes Monday impossible.
• Dim evenings: lower the lighting in the house after about 9:00 PM. Ambient light matters more than people assume.
• Caffeine cut-off by early afternoon. Caffeine has a half-life of around five to six hours; a 4:00 PM energy drink is still measurably active at 10:00 PM.
• The phone sleeps elsewhere. This is the single most argued-about rule and the single most effective one.

Signs a 13-year-old is not getting enough sleep

Tiredness at this age rarely announces itself as tiredness. It shows up as mood, motivation and concentration, and the pattern across the week is the giveaway — worse by Thursday, better after a weekend.

• sleeping past midday at weekends
• falling asleep in lessons or on the journey home
• using caffeine daily to function
• persistent low mood, irritability or anxiety, particularly during term time
• a marked, unexplained drop in school performance

Snoring every night, long pauses in breathing, or persistent mouth-breathing during sleep are different — those are worth raising with your GP rather than treating as a bedtime problem.

Evening habits that work at thirteen

Routines in the toddler sense are gone by thirteen; what replaces them is a set of household norms. Phones charge outside bedrooms. Homework ends an hour before bed. Lights go down after nine. The wake-up time does not move much at weekends.

The most persuasive argument with a 13-year-old is usually not health but performance — sleep is when the day's learning is consolidated into memory, and an extra hour of revision at 11:00 PM costs more than it adds. That framing tends to land where "it's good for you" does not.

How to move bedtime earlier without a fight

1. Fix the wake-up time first. Same time every day, weekends included, for a week. A stable morning anchors the body clock far more effectively than a stable bedtime does.
2. Move in 15-minute steps. Shift lights out 15 minutes earlier every three or four nights. The body clock will follow that; it will fight an hour.
3. Get daylight into the morning. Curtains open on waking, and ten to fifteen minutes outside before school if you can manage it.
4. End screens before the wind-down starts, not as part of it — stopping something engaging is itself stimulating.
5. Give it a fortnight. Two or three nights tells you nothing. Judge it by how the mornings look after two weeks.