Last updated: 4 November 2026
Short answer: You can only sleep with an electric blanket on all night if it is designed for it, with a thermostat for all-night use or an automatic shut-off. For most blankets, UK fire services say to warm the bed first and then unplug it before you get in. This is safer, and a cooler body also tends to sleep better.
As the nights get colder, lots of us reach for the electric blanket. Below, DELIM, a UK sleep wellness brand, sets out what UK fire services and safety experts actually say, who should not use one, and how to use it in a way that helps your sleep rather than harms it.
Is it safe to leave an electric blanket on all night?
It is only safe if the blanket is made for overnight use. Greater Manchester Fire and Rescue Service says to unplug your electric blanket before getting into bed, unless it has a thermostat control designed for safe all-night use. Nottinghamshire Fire and Rescue Service gives the same advice.
Some advice is stricter. North Wales Fire and Rescue Service simply says do not leave an electric blanket switched on all night. If you are not sure what your blanket can do, check the instructions. If they do not clearly say it is safe for all-night use, switch it off before you sleep.
How common are electric blanket fires in the UK?
They are not common, but they are rising. The charity Electrical Safety First found that accidental electric blanket fires in England hit a five year high in 2024/25, with 31 incidents. That was a 24% rise on the 25 incidents the year before, with 11 casualties or deaths.
The charity links the rise to growing fears over energy prices. Its advice is to check your blanket for wear and tear before plugging it in, and to avoid using one overnight unless it has an automatic shut-off.
Does sleeping with an electric blanket on affect sleep quality?
It can. Your core body temperature (the temperature deep inside your body, not your skin) needs to drop a little for you to fall asleep and stay asleep. The Sleep Foundation explains that this drop starts about two hours before you go to sleep, and that a higher core temperature is linked to less deep, restorative sleep.
An electric blanket left on high all night can stop your body from cooling down. You may wake up hot, kick off the covers, then wake again cold. Warming the bed first and switching off when you get in gives you the cosy start without the overheating later.
The Sleep Foundation suggests a bedroom of around 18°C for most adults. If your room is much colder, our guide on whether to sleep with the heating on covers how to balance a warm room with good sleep.
Electric blanket options compared
Here is how the main ways of using an electric blanket compare, based on the fire service and safety charity advice above.
| How you use it | Safety (per UK fire services) | Effect on sleep | Best for |
|---|---|---|---|
| Pre-heat, then unplug before getting in | Recommended for all blankets | Warm start, lets your body cool naturally | Most people |
| Low setting all night with a thermostat made for all-night use | Allowed by some fire services if the blanket is designed for it | Can cause overheating if set too high | People who feel very cold and have a suitable blanket |
| Automatic shut-off timer | Accepted by Electrical Safety First for overnight use | Warm while falling asleep, then switches off | People who fall asleep with it on |
| Ordinary blanket left on high all night | Not advised | Higher risk of overheating and broken sleep | Nobody |
Who should not use an electric blanket?
Some people should avoid electric blankets or speak to a GP first, because they may not feel when they are getting too hot, or because the blanket could be damaged.
Do not use one, according to UK fire services and safety experts
- Babies under 12 months. Which? reports that electric blankets for babies under one are a definite no, as their skin is very sensitive to heat. RoSPA suggests using them with caution for older children.
- People with a pressure relief or air flow mattress. Both Greater Manchester and Nottinghamshire fire services say not to use one in this case.
- People who use emollient creams. Both fire services also list this.
- People with incontinence. Greater Manchester Fire and Rescue Service advises against use, as liquid and electricity do not mix.
Speak to your GP first
- People with diabetes or nerve damage. Mayo Clinic content explains that nerve damage can mean you may not sense if a blanket is too hot, which can lead to burns. It suggests warming the bed, then turning the blanket off before you get in.
- Anyone who is pregnant, has reduced feeling in their skin, or has trouble moving in bed. If you could not easily notice or move away from too much heat, ask your GP or midwife first.
How do you use an electric blanket safely? A UK checklist
These steps come from Electrical Safety First and UK fire and rescue services.
- Check it before the first use each winter. Look for scorch marks, frayed fabric, damp patches, exposed wires, and a worn or chewed cable. If you see any of these, stop using it.
- Replace it after 10 years. Electrical Safety First and the fire services above all agree. Nottinghamshire Fire and Rescue Service adds that an old BEAB safety mark means the blanket is more than ten years old.
- Get it tested every 2 years. North Wales Fire and Rescue Service advises testing by a qualified electrician every 2 years.
- Lay it flat. Never use it folded or creased, as this can make it overheat.
- Never use it with a hot water bottle, and avoid drinks in bed. Water and electricity do not mix.
- Unplug it before you get in, unless it is designed for all-night use.
- Store it rolled or flat in summer, with nothing heavy on top.
- Buy new from a trusted retailer. Look for a UKCA or CE mark, and avoid second-hand blankets.
What are the alternatives to sleeping with an electric blanket on?
The simplest option is to use the blanket only to pre-heat the bed. Doctors quoted by HuffPost UK suggest turning it on an hour before bed and off just as you climb in. Your bed stays warm long enough for you to drift off.
Other ways to stay warm without overheating include:
- A higher tog duvet in winter, or a light throw you can push off in the night.
- Bed socks or a warm layer if your hands and feet get cold.
Winter can leave you feeling drained even when you sleep well. Our guide on why you feel so tired in winter explains the role of daylight. And if a cold is keeping you up, see how to sleep with a blocked nose.
Frequently asked questions
Can you sleep with an electric blanket on all night?
Only if it is designed for it. UK fire services say to unplug it before getting into bed unless it has a thermostat for safe all-night use. Electrical Safety First says overnight use is fine only with an automatic shut-off.
How long should you leave an electric blanket on before bed?
Doctors quoted by HuffPost UK suggest switching it on about an hour before bed, then turning it off as you get in, unless it is made for all-night use.
How old is too old for an electric blanket?
UK fire services and Electrical Safety First say to replace an electric blanket once it is 10 years old. Replace it sooner if you see scorch marks, frayed fabric or exposed wires.
Can you use an electric blanket with a hot water bottle?
No. Electrical Safety First and UK fire services all say never to use both together, because a leak could mix water and electricity.
Do electric blankets use a lot of electricity?
Running costs depend on the blanket's wattage and your energy tariff, so check the label. Electrical Safety First links the recent rise in electric blanket fires to fears over energy prices, so whatever it costs, safety checks matter.
The bottom line
An electric blanket is a lovely way to take the chill off a cold UK bed. For most blankets, the safest and most sleep-friendly way to use one is to warm the bed, then unplug it before you get in. Check it each winter and replace it after 10 years.
This post is for information only and is not medical advice. If you have diabetes, reduced feeling in your skin, a breathing problem or any other health condition, please speak to your GP before using an electric blanket.
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