Sleep Better in the Heat: 12 Ways To Keep Your Bedroom Cool In Summer
The bedroom you’re trying to cool down isn’t a fabric problem first. It’s a heat-source audit.
You’re sleeping on a mattress that’s been absorbing your body heat for six hours. Your phone charger is glowing six inches from your face. Your west-facing window trapped the sun from 6 AM to 8 PM, and the room temperature is still climbing at midnight. The sheets are last on the list, not first.
Here’s how to fix it, and how to keep your bedroom cool in Summer, in the right order.
See more ways to improve your sleep: Best Bedroom Design Tips for Better Sleep, Best Bedding on a Budget for 2026, and Dark Bedrooms: Can They Really Help You Sleep Better?
How To Keep Your Bedroom Cool In Summer
The Five Heat Sources in Your Bedroom
Summer sleep can be a lot cooler once you identify the things heating up your bedroom (and fix them).
Electronics
Phone chargers, alarm clocks, sleep trackers, and TVs all give off heat. Not a lot individually, but in a closed room with the AC fighting an uphill battle, it adds up. Move chargers to the bathroom. Put your phone face down across the room. Unplug what you can.
Mattress Thermal Mass
Your mattress is the largest heat-retaining surface in the room. Memory foam is the worst offender. If yours runs hot, a cooling topper is a genuine fix, not a marketing trick.
West-Facing Windows
A west-facing room in summer (that gets full sun) is a greenhouse from 4 p.m. on. The sun is hitting the room when it’s at its hottest angle of the day. Thermal-lined blackout curtains, drawn at 3 p.m., make a measurable difference.
Pets and Partners
A second body in the bed adds about 200 BTU of heat per hour. A dog adds half that. Not something most people want to optimize against, but worth knowing when you’re trying to figure out why one side of the bed runs hot.
Ambient Temperature Drift
Most thermostats are not in the bedroom. Your house is 72 in the living room and 78 in the bedroom by 11 p.m. A bedroom fan, ceiling or floor, is the cheapest single fix in this entire article.
How To Keep Your Bedroom Cool In Summer
Sheets: What Actually Matters in Summer
Forget thread count. The number is mostly marketing. What to look for: weave, weight, and finishing.
Weave
Percale, not sateen, for hot sleepers. Percale breathes. Sateen traps.
Weight
Linen sheets feel hot when you touch them and cool when you sleep on them. The opposite of what you’d expect. Heavier linen wicks moisture better than light cotton.
Finishing
Garment-washed and stone-washed sheets are softer and cooler than crisp percale. They’re also less likely to feel sticky.
How To Keep Your Bedroom Cool In Summer
The 30-Minute Pre-Sleep Cooldown
Your core body temperature needs to drop by about 2 degrees for you to fall asleep easily. In summer, that drop doesn’t happen on its own. Thirty minutes before bed:
– Turn the bedroom AC down by 3 degrees
– Take a lukewarm shower (cold actually triggers your body to retain heat)
– Switch off any room lights, keep one warm lamp on.
– Drink a glass of room-temperature water
– Get into bed only when the room feels cool, not before
The shower is the one most people get wrong. A cold shower closes your blood vessels and traps heat in your core. A warm shower opens them and lets heat escape. Counterintuitive, but it works.
How To Keep Your Bedroom Cool In Summer
The Overnight Reset (When You’re Already in Bed)
You’re miserable, it’s 2 AM, and you can’t fall back asleep. Don’t keep tossing.
Get up. Stand in the bathroom for two minutes with cool water running over your wrists and the back of your neck. Change into a fresh, dry sleep shirt. Flip the pillow. Drink half a glass of water. Get back in bed.
This works because the pulse points cool your blood, the dry shirt removes the sweat layer trapping heat against your skin, and the brief disruption resets your sleep cycle.
How To Keep Your Bedroom Cool In Summer
Frequently Asked Questions
Does sleeping naked actually keep you cooler?
Not always. Fabric wicks sweat away from your skin — bare skin just lets it sit there. A lightweight, moisture-wicking sleep shirt usually keeps you cooler than nothing, especially if you run warm in the second half of the night when sweating tends to peak.
How cold should I actually set my thermostat for sleep?
The research landing zone is 65–68°F, but that’s an ambient room temperature, not a thermostat number. If your bedroom runs 6 degrees warmer than the rest of the house, set the thermostat to 62 and let the room equalize. A fan will help the cool air reach you faster than AC alone.
Are cooling pillows worth buying?
Depends on what’s making you hot. If you’re a face-down or side sleeper with your face in contact with the pillow most of the night, yes, a gel or latex pillow makes a real difference. If you’re a back sleeper who barely touches the pillow, it’s a low-priority buy. Fix the mattress and the airflow first.
My partner runs cold, and I run hot. How do we compromise?
A dual-zone setup is the real answer: separate blankets (the Scandinavian method) rather than one shared duvet. Each person regulates independently, and you eliminate the negotiation entirely. If separate blankets feel like too much of a departure, start with just separate top sheets and keep one shared blanket for the partner who needs it.
