Is It Safe to Sleep With an Electric Blanket On All Night? Experts Weigh In

Sleep and bedding specialists have shared their insights on the popular winter comfort item. Their verdict highlights potential risks to both your health and your mattress.

With the weather turning chillier, people are reaching for their warmest clothes, cozy pajamas, and indoor heating to stay comfortable and toasty. Others, however, are relying on a more cost-effective method: an electric blanket.

It's a staple in many homes, and it's easy to see why. Instead of slipping between cold sheets after a long day outside, you're guaranteed a warm snuggle every time you climb into bed. Many people switch theirs on about an hour before going to sleep.

But is it safe to keep on all night? When used properly, electric blankets are relatively safe. "We get asked about electric blankets all the time at this time of year," says Judith Ackers, Bed and Mattress Expert at Land of Beds.

"People want to know if they're safe to leave on overnight, whether they'll ruin their mattress, and if they actually help you sleep better," Ackers continues. "The short answer is: it depends how you use them."

Like any appliance with a heating element, electric blankets carry a risk of fire, and that danger only grows the longer they're left running.

"Though they are generally safe to use they can still cause overheating or have electrical malfunctions which can cause fires," explains Carlie Gasia, a Certified Sleep Science Coach and Wellness Coach at Sleepopolis.

"Electric blankets can also cause overheating if left on overnight while you sleep. This can be dangerous because it poses a risk of burning your skin, and, if you're sensitive to heat, it can be quite hazardous," Gasia adds.

"Most manufacturers recommend switching them off before you fall asleep, and there's good reason for that," agrees Ackers.

She explains, "Leaving one on all night increases the risk of overheating, dehydration, or in rare cases, burns or electrical faults. It's also not ideal for anyone with health conditions like diabetes or circulation issues."

Ackers also cautions that prolonged heat exposure can damage mattresses, particularly memory foam ones, and may even void the warranty.

"I've seen mattresses where you can actually see the outline of where the blanket sat," she notes. "If you've spent good money on a quality mattress, it's worth being cautious."

Interestingly, electric blanket manuals rarely caution against leaving one on overnight. Most models actually come with several heat settings and timers that can run anywhere from one hour to eight, and in some cases even ten.

That might give the impression that keeping your blanket on a low setting all night is completely safe, but experts recommend being extra careful.

"Sleeping with an electric blanket is generally safe if properly used, but consider specific features that support safety, like auto shut-off and adjustable temperature settings," explains Ben Trapskin, founder of the sleep advice platform Yawnder.

"Pay close attention to how they regulate heat for comfort without risk," Trapskin says.

Julia Siemen, a Certified Sleep Science Coach at Sleep Advisor, also cautions against keeping an electric blanket on through the night, unless your model comes with a timer that automatically shuts it off after a certain amount of time.

In other words, if your blanket lacks this feature, it's best to turn it off before drifting off to sleep.