by Quick answer: Most sleep guidance points to a cool bedroom, commonly cited around 60 to 67°F (about 15 to 19°C). A cooler room supports the natural drop in core body temperature that helps you fall asleep and stay asleep.
By the MattressNut editorial team · Updated June 2026
Best Sleep Temperature — The Short Answer
Your body lowers its core temperature as it prepares for sleep, and a cool room helps that happen. The frequently cited comfortable range is roughly 60 to 67°F (15 to 19°C). The exact best number varies by person, bedding, and clothing, so treat the range as a starting point and adjust to what feels comfortable.
What to Know
| Factor | Detail |
|---|---|
| Commonly cited range | About 60-67°F (15-19°C) is the range most often recommended for adults. |
| Why cool helps | Core body temperature naturally drops at night; a cool room supports that process. |
| It's personal | Bedding, pajamas, age, and humidity all shift your ideal number. Adjust to comfort. |
Practical Tips
Set your thermostat toward the cooler end and see how you sleep, then nudge it warmer or cooler. Breathable sheets and lighter bedding help you avoid overheating. Keep the room dark and quiet too, since temperature is only one part of a good sleep environment. If you run hot at night, a fan or open window can help.
The Mattress Angle
Room temperature is only half the story — the surface you sleep on traps or releases heat. A breathable, supportive mattress with good airflow helps you stay cool even if the room warms up slightly. Saatva's Classic uses a coil-on-coil design that allows air to move through the mattress, which can help with heat.
See the Saatva Classic and its 365-night trial
The Bottom Line
Aim for a cool bedroom in the commonly cited 60 to 67°F (15 to 19°C) range, then fine-tune to your own comfort. Pair it with breathable bedding and a mattress that doesn't trap heat for the best results.
Bottom line: A cool room around 60-67°F (15-19°C) suits most sleepers, but adjust to what feels comfortable for you.
Related: our full Saatva mattress review.