What Is the Best Temperature for Sleep?

Keeping your sleeping quarters at a temperature near 65°F (18.3°C) is ideal.

Your body’s temperature decreases during sleep, and a cool, but not cold, room will help you settle into and maintain sleep throughout the night.

The Why 

Your body’s internal temperature shifts during a 24-hour period. This is known as a circadian rhythm. Your body begins to shed warmth right about the time you go to bed and continues to cool down until reaching its low point near daybreak, at around 5 a.m.

Your body cools by expanding the blood vessels in your skin. When your temperature starts to drop at night, you may notice that your hands and feet get warmer initially. This is because your body is letting heat escape through them to reduce your core temperature.

If the temperature in your sleeping environment is too hot or cold, it may affect the drop in your body’s internal temperature and cause you to have a poor sleep.