CircadiaOSThe 3 a.m. problem
You overheat early, kick the covers off, then wake up shivering an hour later. A single thermostat setting cannot follow your body. It holds one number all night while your temperature falls and then rises, so you swing between too hot and too cold until the alarm.
How CircadiaOS fixes it
- Connect your devices. Link the smart thermostat and, optionally, the wearable you already own. About five minutes, no new hardware.
- Start on a curve that leans cool. Tell CircadiaOS you sleep hot and your starting schedule begins cooler in pre-sleep and early night, then warms only in the hours before you wake.
- Premium: let your nights tune it. After 14 nights of calibration, CircadiaOS tries the cooler direction first on each setpoint, holds each change for one to two weeks, and keeps what your wearable data supports.
Practical settings to start with: 63–65°F at bedtime, the lowest point in early night, and a rise of a couple of degrees an hour before wake. Pair it with breathable sheets and a light top layer. Nine more fixes.
Why not just crank the AC?
Because you will wake up cold. A flat 62°F all night is right at bedtime and wrong by 4 a.m., when your own temperature is climbing and the room is still fighting it. The answer is a curve, not a lower number. The research on bedroom temperature.
Questions
Why do I wake up hot at night?
Core temperature rises naturally toward morning, and a room held at one setting all night can feel too warm by dawn. Warm bedding, alcohol and late meals make it worse. CircadiaOS follows the curve: cooler when you run hot, easing off before you wake.
What is the best temperature for hot sleepers?
Most hot sleepers do well starting around 60–65°F and warming slightly toward morning. The exact curve depends on your body, which is why CircadiaOS Premium builds it from your wearable data rather than a generic number.
Do I need a cooling pad or a new mattress?
No. CircadiaOS works with the thermostat you already have. No water pad, no new bed, no refills.