The best temperature for sleeping is generally in the cool range of about 60–67°F (15–19°C) for most healthy adults. This slightly cool environment supports your natural drop in body temperature at night and is linked to deeper, more stable sleep.

Core sweet-spot

  • Many sleep experts and organizations recommend keeping the bedroom around 65°F (18–19°C) as a central target.
  • A broader “good sleep” range of roughly 60–67°F (15–19°C) works for most adults, as long as you feel comfortably cool rather than cold.

When to go warmer

  • Older adults may sleep better at slightly warmer temperatures, with some research suggesting 68–77°F (20–25°C) as the efficient range.
  • Babies can usually sleep in the same general range as adults, but caregivers often raise the room a degree or two and adjust clothing and sleep sacks rather than overheating the room.

Signs it is too hot or cold

  • Too hot: You wake up sweaty, toss and turn, or feel stuffy and restless; heat tends to fragment sleep and reduce REM quality.
  • Too cold: You curl up tightly, get cold hands or feet, or wake frequently; shivering or feeling tense can also reduce sleep depth.

Simple ways to hit the range

  • Set your thermostat near 65°F and adjust in 1–2° steps over a few nights until you feel comfortably cool.
  • Use breathable bedding, keep the room dark and quiet, and add or remove a light blanket instead of big thermostat swings.

Bottom line: Aim for a cool bedroom around 65°F (18–19°C), then fine‑tune within roughly 60–67°F based on your age, clothing, bedding, and comfort.

Information gathered from public forums or data available on the internet and portrayed here.