Summer brings longer days, backyard barbecues, and beautiful weather. But for many of us, it also brings a frustrating annual tradition: tossing, turning, and waking up drenched in sweat. It’s hard the beat the heat during the summer!
If you find yourself flipping your pillow to the “cool side” a dozen times a night, you aren’t alone. Heat is one of the most common environmental disrupters of deep, restorative sleep.
Here is a look at the science behind why summer heat steals your sleep, and a few practical, expert-backed strategies to help you stay cool until morning.
Your body operates on a natural 24-hour biological clock known as your circadian rhythm. As bedtime approaches, this clock signals your body to start cooling down. In fact, your core body temperature needs to drop by about 2°F to 3°F to initiate deep, high-quality sleep.
When your bedroom is too hot, your body has to work overtime to shed that heat. Your heart rate stays elevated, your body sweats to cool itself down, and you spend far less time in the deep, restorative stages of sleep (like REM and slow-wave sleep).
The Sweet Spot: Sleep experts generally agree that the ideal bedroom temperature for optimal sleep is between 60°F and 67°F (15°C to 19°C).
If cranking your air conditioning down to 60°F isn’t an option (or drives your electric bill through the roof), try these tactical adjustments to your environment and routine:
Ditch the heavy comforters and synthetic materials like polyester, which trap heat right against your skin. Instead, switch to breathable, moisture-wicking fabrics. 100% long-staple cotton, linen, or bamboo sheets allow air to circulate much more freely, helping your body naturally regulate its temperature.
If you rely on a fan, don’t just point it directly at your face. Try placing a shallow bowl of ice or a frozen water bottle directly in front of the fan. As the air passes over the ice, it creates a crisp, chilled mist that can lower the ambient temperature around your bed. If you have a ceiling fan, ensure it is rotating counterclockwise at high speed to push a cool breeze straight down.
It sounds counterintuitive, but taking a cold shower right before bed can actually backfire. Cold water causes your blood vessels to constrict, trapping heat inside your core. Instead, take a lukewarm or slightly warm shower. When you step out into the cooler bedroom air, your blood vessels will dilate, rapidly releasing core heat and signaling to your brain that it’s time for sleep.
Keeping your bedroom cool at night starts the moment you wake up. Keep your blinds or heavy blackout curtains closed during the hottest parts of the day (especially if your bedroom windows face south or west). This blocks the “greenhouse effect” from heating up your walls, furniture, and mattress while you’re away.
While summer heatwaves can temporarily disrupt anyone’s sleep, chronic sleeplessness shouldn’t be ignored. If you find yourself consistently struggling to sleep well regardless of the temperature, or if you experience loud snoring and chronic daytime fatigue, it may be a sign of an underlying sleep disorder.
At Somnus Sleep Center, we help you get to the root of your sleep challenges so you can rest easy all year long. Schedule an appointment today!
