Discover expert insights on temperature bedroom sleep. Professional advice and tips from LA Mattress Store to improve your sleep and comfort.
Too hot. Too cold. Most people have experienced how strongly bedroom temperature affects sleep quality. But why does it matter so much — and what can you actually do about it?
Here's what the science says and how to apply it practically in your bedroom.
Sleep and body temperature are tightly linked through your circadian rhythm — your body's internal 24-hour clock. In the evening, as you approach bedtime, your core body temperature begins to drop. This cooling process is one of the body's key signals that it's time to sleep.
When your bedroom is too warm, this drop is harder to achieve. Your body works against its own natural process, making it harder to fall asleep and easier to wake during the night. When the room is too cold, your body has to work to stay warm rather than relax into sleep.
This is why temperature is one of the most controllable, highest-impact levers you have for sleep quality.
Body temperature also naturally rises in the second half of the night as morning approaches. If your room is already warm when this happens, it can trigger early waking — a common complaint that isn't always recognized as a temperature issue.
Who sleeps hot? Heavier body types tend to retain more heat. Menopause can cause significant nighttime temperature fluctuations. Certain medications affect thermoregulation. And in a place like Los Angeles, warm nights are just part of life for much of the year.
Cold is generally better than hot for sleep — but there's a floor. When you're too cold, your muscles tense up, blood flow changes, and your body burns energy staying warm instead of resting. Cold feet are a particular problem: peripheral vasoconstriction (vessels narrowing to conserve heat) can actually keep you awake.
A simple fix: wear socks to bed. Warming your feet encourages peripheral blood flow, which helps redistribute heat from the core and speeds up the natural temperature drop needed for sleep.
Most sleep research points to a bedroom temperature between 60–67°F as optimal for most adults. 65°F is commonly cited as the target. That said:
The best number is the one where you fall asleep quickly, stay asleep, and wake up feeling rested — not the one a study averaged across 500 strangers.
The guesswork of "is it cool enough?" is eliminated with a programmable thermostat or a smart plug on a window AC unit. Set it to cool your bedroom to your target temperature 30–60 minutes before you plan to sleep. Your body will thank you.
Your mattress has more impact on sleep temperature than most people realize (more on this below). A dense foam mattress can trap body heat all night; an innerspring or latex model allows air to circulate. This is one area worth getting right when you buy.
Poly-cotton blends trap heat. Percale cotton breathes well and stays cool. Bamboo sheets are moisture-wicking and often cooler against skin than cotton. Linen is highly breathable but rougher in texture. Avoid microfiber if you sleep warm — it doesn't breathe.
Wool is uniquely good at regulating temperature — it wicks moisture and adjusts to your body heat, staying warmer when you're cold and cooler when you're warm. Unlike down, wool works across seasons without needing a heavy or a light version. If you share a bed with someone who has different temperature preferences, wool comforters are one of the most practical solutions.
Memory foam pillows trap heat — the dense foam holds warmth from your head all night. Buckwheat hull pillows have natural air channels that allow constant airflow, keeping your head noticeably cooler. They have a different feel (firmer, more adjustable), but for hot sleepers they're worth trying.
A mattress topper can help temperature regulation if you choose wisely. Latex toppers breathe well and don't retain heat the way standard memory foam does. Wool toppers are naturally temperature-regulating. Avoid thick, dense memory foam toppers if you already sleep warm.
One of the most common sleep complaints couples have. Practical solutions:
In LA's climate, west-facing rooms can absorb significant radiant heat through windows during the afternoon. Heavy blackout curtains serve double duty — they block light for better sleep AND prevent solar heat gain during the day, keeping the room naturally cooler come bedtime.
No amount of open windows or programmable thermostats fully compensates for a mattress that retains heat. Here's the quick breakdown:
If you're a consistent hot sleeper, this is worth taking seriously when mattress shopping. Come into any of our LA Mattress showrooms and tell us you sleep hot — we'll steer you toward the options that tend to perform best for warm sleepers, and you can feel the difference firsthand.
Most research points to 60–67°F (15–19°C), with 65°F being the most commonly cited target. The right temperature for you specifically depends on factors like body type, age, and whether you sleep with a partner.
Core body temperature naturally rises in the second half of the night. If your room or bedding traps heat, this natural rise can cross the threshold that wakes you up. Keeping the room cooler and using breathable bedding and mattresses helps prevent this.
Cooler is generally better — within a reasonable range. Most adults sleep best between 60–67°F. Extremely cold rooms (below 55°F) become uncomfortable and disruptive. Warm rooms (above 70°F) have a stronger negative effect on sleep quality than cool ones do.
Yes, significantly. Dense foam mattresses trap body heat; innerspring and latex mattresses breathe better. If you consistently sleep hot, your mattress choice is one of the most impactful changes you can make.
Use separate blankets (each person regulates their own layer), adjust sleepwear individually, and consider a thermostat schedule that cools the room after both of you are asleep. If it's a chronic issue, dual-zone mattress systems or mattress toppers can help each person sleep at their preferred feel without changing the whole setup.
Skip the comparison shopping. Answer a few questions and we'll narrow it down to the mattresses that actually fit your sleep style.
Buying guides and sleep advice — no email signup required.
