How to keep a sleep journal

A sleep journal is a few lines a day about when you slept and what you did before. It takes two minutes, needs nothing but paper or your phone's notes, and after a week or two it shows patterns a wearable can't. Here's what to write and a template to copy.

On this page: Why keep one · What to write · Template · Reading it · Tips

Why keep a sleep journal?

Most people remember their sleep in broad strokes: "I slept badly this week." A journal swaps that for specifics. After a week or two you can see things like: you fall asleep faster on days you walk outside, the second coffee at 3 p.m. lines up with restless nights, or Sunday's lie-in is followed by a slow Monday night.

It's also the same basic tool clinicians use. Sleep doctors routinely ask for a sleep diary, and researchers built a standard format, the Consensus Sleep Diary, so that diaries could be compared. You don't need anything that formal to learn about your own habits, but it's a good sign that a simple log is useful.

And it fills a gap that wearables leave. A watch or ring can estimate when you slept. It can't tell you what you ate, how stressed you were, or how rested you felt. If you already wear one, a journal is the missing half. Our guides to reading your Apple Health sleep data and improving your sleep score cover the tracker side.

What to write each day

Split it into two short entries. Each should take a minute or two.

In the morning, about last night:

• Into bed: the time you got into bed.
• Lights out: when you started trying to sleep, if that was later.
• Time to fall asleep: a rough guess, such as "about 20 minutes". Don't check the clock at night to get it right. A guess is fine.
• Wake-ups: how many you remember, and roughly how long you were awake in total.
• Final wake-up and out of bed: two separate times, if you lay there for a while.
• How rested you feel: 1 (exhausted) to 5 (fully rested).
• Tracker time asleep (optional): if you wear a device, copy its number here.

In the evening, about today:

• Caffeine: what and when, including tea, cola and energy drinks.
• Alcohol: how much and when.
• Naps: when and how long, including dozing on the couch.
• Exercise: what and when.
• Big meal: time of your last substantial meal.
• Screens and wind-down: what you did in the last hour before bed.
• Stress or notes: anything unusual, like a deadline, travel, illness, a late event, or a different bedroom.

That's it. Resist the urge to add twenty columns. The best journal is the one you'll still be filling in on day 12.

A simple sleep journal template

Copy this into a notebook, notes app or spreadsheet. One row per day. The morning columns describe the night before that date.

If you prefer a shorter version, keep just five columns: into bed, out of bed, rested (1-5), caffeine time and notes. You'll still see most of the big patterns.

Two numbers worth working out each week:

• Average time in bed: from into bed to out of bed.
• Rough time asleep: time in bed, minus time to fall asleep, minus time awake in the night.

Compare your rough time asleep with the recommended range for your age in our sleep needs tool. If you're often well under it, the simplest change is usually more time in bed, not a new gadget.

How to read your journal after two weeks

Wait until you have at least 10 to 14 days, including a couple of weekends. Then sit down with it for ten minutes and ask:

1. How steady are my times? Look at the spread of your bedtimes and wake times. A two-hour swing between weekdays and weekends is common and worth narrowing.
2. What comes before my best and worst nights? Mark your three highest and three lowest "rested" scores. Look at the evening columns for those days. Late caffeine, alcohol, late meals, late exercise and screens in bed are the usual suspects.
3. How long does it take me to fall asleep? If it's often long, look at your wind-down and caffeine timing. If you fall asleep the moment your head hits the pillow every night and still feel tired, you may not be giving yourself enough time in bed.
4. Do naps line up with harder nights? Long or late naps can make it harder to fall asleep at night for some people.

Pick one change at a time, such as moving your caffeine cutoff earlier, and keep journaling for another week to see whether it makes a difference. Our caffeine cutoff calculator can help with that one.

Tips that keep it going

• Keep it where you'll see it. A notebook on the nightstand or a pinned note on your phone's home screen.
• Fill in the morning entry within half an hour of getting up, before the night fades.
• Don't clock-watch. Checking the time at 3 a.m. to log it can keep you awake. Estimate in the morning instead.
• Be honest, not perfect. Missing a day is fine. Just skip it and carry on.
• Don't judge the night while it's happening. The journal is for spotting patterns later, not for grading yourself.

If your journal shows weeks of poor sleep despite good habits, or you notice loud snoring, gasping at night or strong daytime sleepiness, take it to a doctor. It'll make that conversation much easier.

Where SleepBetter.ai fits

SleepBetter.ai doesn't have a journal, so use the template above. What the app does have is wind-down audio: sleep sounds, guided sleep meditations and sleep journeys, soundscapes that move through several stages on their own and keep playing with your screen locked. If your journal points to a racing mind at bedtime or a noisy room, that's the part of your routine it can help with. Our all-night, screen-off guide covers how to set up sound for the whole night.

This page is general information about sound and sleep habits, not medical advice. If poor sleep is affecting your days, talk to a doctor or a sleep specialist.