For most adults, the best bedroom temperature in winter is 16-18°C. Cool wins. That range helps your body do what it already wants to do at night: lower its core temperature and settle into sleep. If you feel the cold easily, are older, or have a health condition, aiming closer to 18°C can make more sense. The goal is simple: a bedroom that feels fresh and cosy, not icy and not stuffy.
The quick answer: how warm should your bedroom be?
Winter catches people out because the bedroom does not need to feel like the living room. You might enjoy 20-21°C while watching TV, but that same temperature can feel too warm once you are under a duvet. For sleep, slightly cooler is usually better.
| Bedroom temperature | What it usually means | What to do |
|---|---|---|
| Below 12°C | Too cold for comfortable sleep for most people | Warm the room before bed, reduce draughts, and use warmer bedding |
| 16-18°C | The best range for most adults in winter | Start here and fine-tune with bedding and sleepwear |
| 18-20°C | Can suit colder sleepers and some older adults | Use this if 16-18°C still feels chilly with proper bedding |
| 22-24°C+ | Often too warm for solid sleep | Lower the thermostat, lighten bedding, and improve airflow |
If you want one number to test first, try 17°C or 18°C for a few nights. Then adjust in small steps. Your duvet, mattress, sleepwear, and whether you sleep alone or with a partner all affect how that temperature feels.
Why a cooler bedroom helps you sleep
Your body does not just switch off when you go to bed. In the evening, your core temperature naturally drops as part of your sleep rhythm. A cooler bedroom supports that process. A room that is too warm can make it harder to fall asleep, easier to wake up, and more likely that you spend the night tossing the duvet on and off.
If the room is too warm
Warm bedrooms often lead to restless sleep. You may wake up sweaty, kick your covers away, feel thirsty, or struggle to settle again after waking in the night. Around 22°C may feel fine when you first get into bed, but with winter bedding it can quickly become too much. By 24°C, many people will feel distinctly uncomfortable.
If the room is too cold
Very cold bedrooms are not the answer either. Around 12°C is too cold for most people to relax properly. Cold feet, tight shoulders, curling up to stay warm, and waking too early are common signs. You should feel cool when you get into bed, not like you are preparing for an expedition.
How to keep your bedroom in the right range
You do not need to blast the heating all night. Small, smart changes usually work better.
- Warm the room before bed. Set the heating to come on 30-60 minutes before bedtime, then turn it down once you are settled.
- Use a room thermometer. Guessing is unreliable. A simple thermometer tells you whether your bedroom is actually 17°C or secretly 23°C.
- Reduce draughts without making the room stale. Seal obvious gaps around windows and doors, but do not trap damp, stale air inside.
- Ventilate earlier in the evening if opening a window all night makes the room too cold. Fresh air is great. A freezing draught across your face is less impressive.
- Keep humidity in check. Very dry or muggy air can make the room feel worse than the thermometer suggests. A rough target of 30-50% humidity is a useful guide; see ideal bedroom humidity for sleep.
- Adjust the bed, not just the thermostat. Heavy pyjamas, thick protectors, and overly warm bedding can turn a good room temperature into an overheating problem.
If central heating leaves the air parched, see dry air in the bedroom at night for simple ways to stay comfortable at cooler settings.
If you still wake up hot or cold after changing the thermostat, the real issue is often your sleep setup rather than the room itself.
Bedding matters as much as the thermostat
Room temperature is only half the story. Your duvet, sheets, pillow, topper, and sleepwear control how much heat stays trapped around your body. That is why one person loves 17°C while another says it feels freezing.
If you use duvet tog ratings, think in ranges instead of rigid rules. For practical layering ideas, see how to adjust your duvet for every season. In many centrally heated homes, a 10.5-13.5 tog duvet works well in winter. Colder rooms may need more insulation, while couples often need less because shared body heat adds warmth. Layering can be even better because it gives you more control than one extra-heavy duvet.
Not sure which fill keeps you warm without overheating? Compare down vs wool duvet.
If you need a new insert, explore duvets suited to colder months.
Breathable materials help too. Cotton-rich bedding, lighter sleepwear, and products that release heat more easily can stop winter comfort from becoming winter overheating. Choosing the right cover fabric also changes perceived warmth—see flannel vs sateen duvet cover. Cloudpillo focuses on adjustable, personalised sleep products for exactly that reason. Your sleep setup should adapt to you, not force you into a one-size-fits-all night.
Who may need a slightly warmer bedroom?
The 16-18°C guideline works for most healthy adults, but not everyone. Older adults, babies and toddlers, and people with certain health concerns can be more sensitive to cold. In those cases, a bedroom closer to 18°C or a little above may feel more comfortable and practical.
If you are setting up a room for a baby or for someone with a medical condition, use tailored professional guidance rather than copying the ideal range for a healthy adult.
Common questions about winter bedroom temperature
Is 22 degrees cold for a room?
No. In winter, 22°C is not cold for a bedroom. It is actually warm for sleep. It may feel pleasant while you are awake, but many people find it too warm once they are under the covers.
Is 12 degrees cold for a bedroom?
Yes. For most people, 12°C is too cold for comfortable sleep. You may struggle to relax, especially if your hands and feet get cold easily. Warm the room and use suitable bedding instead of trying to battle through it.
Is 24C too hot for a bedroom?
Usually, yes. At 24°C many sleepers become restless, sweaty, or wake more often. Lowering the thermostat, reducing your duvet tog, or improving airflow will usually help.
Is 17.5 C too cold for a house?
For a whole house, 17.5°C can feel cool, especially for older adults or people sitting still for long periods. For a bedroom at night, though, 17.5°C is often right in the sweet spot.
Should you sleep with the window open in winter?
Only if it keeps the room fresh without creating a strong cold draught. If opening the window makes the room drop too far below your target temperature, ventilate earlier in the evening and sleep with the window closed.
What if I still sleep hot in a cool room?
Then check your duvet, pillow, topper, mattress protector, and sleepwear. A cool bedroom cannot fully compensate for bedding that traps too much heat. This is where breathable and adjustable sleep products can make a real difference.
Start with 17-18°C, adjust in small steps, and let your bedding do the fine-tuning. Better winter sleep is rarely about cranking the heating. It is about getting the whole setup right.
