Sleep

The bedroom temperature that actually gets you better sleep

Your body needs to cool down to fall and stay asleep - a warm room fights that process directly

Core body temperature naturally drops by roughly 1-2 degrees as part of the process of falling asleep and staying in deep sleep, triggered partly by blood vessels near the skin dilating to release heat. A bedroom that's too warm works directly against this mechanism, making it harder to fall asleep, more likely to wake during the night, and reducing the proportion of time spent in deep, restorative sleep stages.

Most sleep research converges on roughly 15-19°C (60-67°F) as the range that best supports this natural cooling process for most adults, though there's real individual variation based on bedding, sleepwear, and personal preference. What matters more than hitting an exact number is avoiding a room that stays noticeably warm through the night, which is a more common and more fixable problem than people treat it as.

For someone training hard, this connects directly to recovery: growth hormone release and much of the tissue repair work associated with sleep happens predominantly during deep sleep stages, so a bedroom temperature that's quietly cutting into deep sleep is also quietly cutting into recovery. A fan, breathable bedding, or simply turning the thermostat down a few degrees before bed is a low-effort lever with real downstream effects.

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