Tips · 4 min read · 2026-02-20
The best temperature for sleep (and why it matters)
65–68°F isn't arbitrary — it's the temperature at which your body can shed heat fastest.
Sleep is a heat-shedding event
Core body temperature must drop ~1°C to enter deep sleep. A cool bedroom accelerates this drop; a warm one delays it. 65–68°F (18–20°C) is the consensus range across multiple studies.