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Sleeping hot? Here’s how to keep cool at night this summer

Emma Sleep and Dr Allie Hare share simple, science-backed ways to stop overheating ruining your sleep. 

By Mumsnet HQ | Last updated May 15, 2026

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Emma Sleep has teamed up with Dr. Allie Hare, President of the British Sleep Society and sleep consultant, to reveal how you can stay cool when sleeping this summer.

Dr Allie Hare explains the impact of overheating on sleep quality: “Overheating during sleep can significantly reduce sleep quality and duration. In particular, being too hot at night can reduce slow wave (deep) sleep, the stage of sleep that helps us awaken feeling rested.”

Sleeping in the heat can make it difficult to stay asleep, so comfort is essential to avoid disruptions. Investing in a cooling mattress will help you stay comfortable throughout any summer heat wave by regulating your body temperature, reducing the likelihood of you waking up due to overheating. 

Keeping your head cool is a highly effective way to encourage sleep in warmer weather. Cooling pillows help by maintaining your ideal body temperature and minimising the chances of sleep disruption.

A mattress topper with cooling technology will also work to absorb and dissipate body heat, helping you maintain a consistent and comfortable temperature throughout the night for a deeper and more restful sleep.