Naps for night shift workers: when and how long
Updated October 27, 2026 · Sources listed below
Night shifts fight your body clock. A well-timed nap is one of the few proven ways to stay alert through the small hours: a longer nap before the shift, and a short one during it if your workplace allows.
What the research shows
- A systematic review of napping in night-shift workers found naps generally reduced sleepiness and improved performance on the job.[1]
- In a study of 12-hour night shifts, a 20-minute nap opportunity in the early-morning hours improved performance and alertness later in the shift.[2]
- Short naps can still leave you groggy for a few minutes when you wake, especially in the middle of the night, so plan a short buffer before critical tasks.[3]
Before the shift: the "prophylactic" nap
If you're starting a night shift after being awake all day, a nap in the late afternoon or early evening banks some sleep before the hardest hours. If you have the time, a full 90-minute cycle avoids waking from deep sleep; if not, keep it to 20 minutes. See how long a nap should be.
During the shift: short and early
- Keep it to about 20 minutes of sleep so you can get back to work quickly.[2]
- Aim for your break before the low point, typically the early-morning hours, when alertness bottoms out.
- Allow 10 to 15 minutes after waking before tasks that need full attention, such as medication checks or driving.[3]
- Add caffeine before the nap, not after, if it doesn't affect your sleep after the shift. See the coffee nap.
Getting home safely
The drive home after a night shift is when many people are at their sleepiest. If you feel drowsy, pull over somewhere safe for a short nap rather than pushing on; caffeine plus a nap of 15 minutes or less worked better than either alone for sleepy drivers.[4]
Making a break nap work
- Use an eye mask and earplugs, and recline if a bed isn't available.
- Use an alarm you can't sleep through, but that won't disturb others: a vibrating watch is ideal. Power Napper's rest stop alarm is loud from the first second with no snooze, for when you have to be up.
- Set the alarm for minutes asleep, not minutes lying down, so a 20-minute nap is really 20 minutes.
Frequently asked questions
When should night shift workers nap?
Take a longer nap before the shift, in the late afternoon or early evening, and if possible a short nap of about 20 minutes during the shift before the early-morning low point.
How long should a nap be during a night shift?
About 20 minutes of sleep. It improves alertness later in the shift without a long recovery, though plan 10 to 15 minutes before critical tasks in case you wake groggy.
Is it safe to drive home after a night shift?
Drowsy driving is dangerous. If you feel sleepy, pull over somewhere safe and take a short nap; caffeine right before a nap of 15 minutes or less reduced sleepiness in drivers more than either alone.
Sources
- Ruggiero & Redeker, Biological Research for Nursing (2014): napping in night-shift workers, a systematic review
- Purnell, Feyer & Herbison, Journal of Sleep Research (2002): a nap during 12-hour night shifts
- Hilditch & McHill, Nature and Science of Sleep (2019): sleep inertia, current insights
- Reyner & Horne, Psychophysiology (1997): caffeine combined with a short nap in sleepy drivers
This guide is general information, not medical advice. Power Napper is not a medical device.