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What does my Oura data look like?

3 years of a ring's nights and days: how much there is, what is typical, how it has moved, and where the last month sits.

Client name: Bill · Oura ring · 2023-10-03 → 2026-10-15

Breaks of three nights or more with no sleep recorded: none. Single missing nights are not listed; there are 21.

Sleep

Each night is dated by the evening it began, not by Oura's own label, which is the morning it ended.

Heart, breathing and temperature

Measured overnight. Readiness, temperature and SpO2 are labelled by Oura with the morning; here they sit on the evening before, beside the night that produced them.

Days

Fitness estimates

Oura's model outputs rather than measurements; useful for their direction over months, not a single reading.

By year

Median of the days that year; small number: days with a reading. Hover a cell for the middle half.

By day of the week

Median over every such day in the record. Bold: that measure's highest day; grey: its lowest. For night measures the day is the evening the night began, so "Fri" is Friday night.

What else the ring holds

Workouts Oura recorded

609 sessions (543 confirmed, 60 manual, 6 workout_heart_rate): the twelve most frequent activities, sessions per year. Auto-detected sessions are Oura's guess at what you were doing.

What the prose above is checked against

Each is computed at build time. One that fails stops the build rather than leave a sentence standing that the data no longer support.

• ✓ nights are dated by the evening they began: Oura's efficiency contributor and the sleep record's efficiency correlate r = 0.997 on the same row and 0.08 / 0.08 one row either side
• ✓ the 165 SpO2 nights the API returns twice are one night read twice: 157 agree exactly, the other 8 by at most 0.114 points, under a quarter of the night-to-night middle half (0.77); each is drawn as the mean of its copies
• ✓ the record is current: last night on file began 2026-10-13, 2 day(s) before yesterday (limit 2)
• ✓ no day-measure is drawn for today (2026-10-16), a day still in progress
• ✓ every headline measure has enough readings to judge 'lately' (10 of 10; needs 20 of the last 30 days and 180 of the year before)

Sources and derivation

• Oura API v2, read with a personal access token into a local mirror. Last pull 2026-10-16 10:00 (local time), 33 pulls on record. Each run re-fetches the last fourteen days, because Oura revises recent days, and keeps what it downloaded.
• Nights come from the sleep endpoint's main sleep (long_sleep); naps are left out. Timestamps are read as the local clock time you lived them, so a night in another time zone keeps its own bedtime.
• A night belongs to the evening it began; a sleep starting before 06:00 counts as the previous evening.
• Today is left out of every day-measure, being still in progress.
• Every value on this page is in tidy.csv beside it.