Posted by Chris Ailey
on July 04, 2026
UK homes are built to hold heat in, which is wonderful in January and difficult in July. When a heatwave settles in, the bedroom is often the last room to cool down, and one broken night makes the next hot day harder still. If you have found yourself lying on top of the covers at 3am, staring at the ceiling and doing the maths on how little sleep you are going to get, you are not alone.
The reassuring part is that a handful of small, mostly free changes make a real difference. Below is a calm, practical approach to sleeping through a heatwave, working from the room, to the bed, to your body, to your routine.
Why UK bedrooms get so hot at night
British houses are designed to trap warmth, with good insulation and small windows that are brilliant in winter and unhelpful in a heatwave. Bedrooms are often upstairs, where heat rises and lingers, and they collect warmth all day while you are out. By bedtime, the room can be several degrees warmer than outside, which is why simply opening a window at 11pm rarely fixes it. The trick is to stop the heat getting in during the day, then help it escape at night.
Step one: cool the room during the day, not just at night
The biggest mistake is waiting until bedtime. By then the heat is already in the walls and furniture. Instead, work ahead of it.
- Close curtains or blinds on the sunny side of the house during the day. Keeping sunlight out is the single most effective thing you can do to stop a room heating up.
- Keep windows closed while the air outside is hotter than the air inside, usually through the middle of the day, then open them in the early morning and late evening when it cools.
- Create a through-draught by opening windows or doors on opposite sides of the home, so cooler evening air can move through.
- Use a fan to move air rather than just stir warm air in a sealed room. Placing a bowl of ice or a frozen water bottle in front of it is an old trick that genuinely helps.
Step two: lighten the bed
This is where bedding earns its place. In hot weather, the aim is airflow and dryness, not more layers. Heavy, synthetic or brushed fabrics trap heat and moisture against the skin, while natural, breathable fibres let both escape.
- Swap to breathable natural fibres. Linen and bamboo move air and handle moisture far better than polyester or microfibre. A linen or bamboo set feels lighter and drier through the night. Our guide to whether linen bedding is cool explains why.
- Drop the tog, or lose the duvet. On the hottest nights, sleeping under just a duvet cover or a flat sheet is often enough. A flat sheet gives you something light to pull over you without the heat of a filled duvet.
- Turn to a fresher pillow. A breathable pillow and a smooth silk or bamboo pillowcase keep the area around your head and neck cooler, which matters more than most people expect given how much heat we lose through the head.
Breathable summer swaps
Made for warmer nights
Step three: help your body cool down
Your body needs to lose a little heat to fall asleep, so give it a hand.
- Have a warm, not cold, shower before bed. It sounds backwards, but a cold shower tells your body to hold on to heat, while a warm one helps you shed it afterwards as you cool down.
- Stay hydrated through the evening and keep a glass of water by the bed. Even mild dehydration makes it harder to regulate temperature.
- Wear light, loose cotton nightwear, or less. Natural fibres against the skin always beat synthetic ones in the heat.
- Cool your pulse points. A damp flannel on the wrists, the back of the neck or the forehead cools the blood close to the surface. Sticking a foot out from under the covers works for the same reason.
Keep the routine steady
Heat disrupts sleep, so protect the basics rather than abandoning them. Keep your usual wind-down, dim the lights early, and try not to clock-watch if you wake in the night. A hot night always feels worse when you fight it. Cool the room a little, take a sip of water, and let sleep come back on its own terms. It is also worth easing off alcohol, caffeine and heavy meals late in the evening, all of which make it harder for the body to cool itself.
A note on hot weather and health
For most of us a heatwave is uncomfortable rather than dangerous, but very warm nights are harder for older people, young children and anyone who is unwell. Keeping bedrooms as cool as possible, staying hydrated and checking on vulnerable family or neighbours matters more than any bedding choice.
The quickest sleep win
If you change one thing this week, make it the layer against your skin. Breathable natural bedding will not make a room cold, but it stops the bed from adding to the problem, and that is often the difference between tossing and turning and actually drifting off. Explore the summer edit or browse cool and breathable bedding to get started.
FAQs
What is the best bedding for sleeping in a heatwave?
Light, breathable, natural bedding is best. Linen and bamboo sheets and duvet covers allow air and moisture to move, so the bed feels fresher. Pair them with a lower tog duvet, or just a flat sheet, on the hottest nights.
Should I have a cold shower before bed in hot weather?
A warm shower is usually better than a cold one. A cold shower can cause your body to retain heat, whereas a warm shower helps you release heat as you cool down afterwards.
Does a fan actually help you sleep in the heat?
Yes, a fan helps by moving air across your skin, which aids evaporation and cooling. Position it to create a flow through the room, and place a bowl of ice in front of it for an extra cooling effect.
Why does my UK bedroom get so hot at night?
UK homes are built to retain heat, and upstairs bedrooms collect warmth through the day. Keeping curtains closed against the sun during the day and ventilating in the cooler evening and morning is the most effective fix.
Is it better to sleep with a window open in a heatwave?
Open windows when the air outside is cooler than inside, usually early morning and late evening, and keep them closed during the hottest part of the day so you are not letting hot air in.
