How to Sleep Well in Hot Weather

11 August 2026
|In Wellness
|By Donato Paolino
How to Sleep Well in Hot Weather
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Do you struggle to fall asleep because your bedroom feels like an oven? Do you wake up several times during the night with a warm pillow, unable to find a comfortable sleeping position? Do you feel tired, irritable or wake up with a headache in the morning, even though you have spent several hours in bed? And, above all, are you wondering how to sleep in hot weather without having to keep the air conditioning running all night?

When summer temperatures rise, sleeping can become surprisingly difficult. It is not simply a matter of feeling uncomfortable: temperature also plays a role in the complex mechanisms our body uses to regulate itself and make the transition from wakefulness to sleep.

Understanding how to sleep well in hot weather, therefore, means taking action not only when we get under the covers, but throughout the day, gradually preparing both our home and our body for the night ahead.

Let’s look at what we can do in practical terms.

Table of Contents

Why Do We Sleep Worse When It’s Hot?

As we prepare to fall asleep, our body goes through several physiological changes. One of these involves thermoregulation: our internal body temperature tends to decrease as we approach sleep.

This is why an excessively warm bedroom can make it harder to reach the comfortable conditions needed to fall asleep. The result may be greater difficulty drifting off, more fragmented sleep and annoying awakenings during the night.

People trying to understand how to sleep when it’s hot often make one common mistake: they take action only a few minutes before going to bed. If a room has been absorbing heat for ten hours, it is unlikely to become cool simply because you open a window at 11 p.m.

The best strategy begins several hours earlier.

Keep Your Home from Heating Up During the Day

One of the most effective measures is to limit the amount of heat entering your home during the hottest hours of the day.

If it is 34°C outside and 27°C indoors, opening all the windows in the afternoon will not necessarily cool the house down. In fact, it may have the opposite effect by allowing hotter outdoor air to enter.

In rooms exposed directly to sunlight, it can therefore be useful to lower shutters or blinds, close curtains and limit how often you open the windows when the temperature outside is significantly higher.

Open windows become much more useful in the evening, during the night or early in the morning, when the outdoor air is actually cooler than the air inside your home. Creating a cross-breeze between windows or doors on different sides of the house can also encourage air circulation.

This principle is important when learning how to sleep at night in hot weather: the goal is not simply to create cold air, but above all to prevent unnecessary heat from accumulating in the first place.

What Is the Ideal Temperature for Sleeping?

There is no single perfect temperature that works for everyone. Age, clothing, bedding, humidity, individual characteristics and personal habits can all significantly affect how we perceive heat.

As a general reference, many sleep recommendations suggest keeping the bedroom cool, often indicating an ideal sleeping temperature of approximately 16–19°C (61–66°F). However, there is no need to become obsessed with a specific number. What really matters is creating an environment in which your body does not have to work continuously to release excess heat.

Something that feels pleasant in winter can also be completely unsuitable in summer. Duvets, heavy mattress protectors, synthetic blankets and thick pyjamas can retain considerably more heat than we realise.

Even if you cannot achieve a particularly low bedroom temperature, you can still improve your comfort by paying attention to ventilation, fabrics, humidity and personal habits.

Air Conditioning: Yes, but Don’t Turn Your Bedroom into a Refrigerator

Air conditioning can be a valuable ally on particularly hot nights. However, there is usually no need to set the temperature extremely low.

An excessive temperature difference between indoors and outdoors can feel uncomfortable and unnecessarily increase energy consumption. It is better to use air conditioning sensibly, with the aim of making the room comfortable rather than freezing cold.

One practical solution is to cool the bedroom during the hours before bedtime and, when available, use a night or sleep mode that manages temperature and airflow more gently.

When the air conditioning is running, it is generally advisable to keep doors and windows closed in the air-conditioned room so that the cooled air is not continuously lost.

A Fan Doesn’t Lower the Temperature, but It Can Help

A fan does not actually cool a room in the same way as an air conditioner. Instead, it moves the air and can make you feel cooler by helping heat dissipate from your skin.

For some people, this alone is enough to make a hot summer night considerably more comfortable.

It is usually better to avoid directing a very strong, continuous airflow straight at your face. You can position the fan so that it encourages air circulation around the room or use its oscillating function.

During periods of extreme heat, however, a fan should not be considered a universal solution against overheating. When environmental temperatures become particularly high, it is important to follow appropriate health advice, especially for older people, young children and vulnerable individuals.

A Lukewarm Shower Before Bed Can Help

After a scorching summer day, the temptation may be to jump straight into an ice-cold shower. This is not always necessary.

A lukewarm or pleasantly cool shower before bed can feel more comfortable and help reduce the sensation of heat without exposing the body to a sudden and extreme temperature change.

The goal is not to step out of the shower shivering, but to create a pleasant feeling of freshness and encourage conditions that help the body cool down.

Even small actions can make a difference. Washing your face, arms and legs, putting on lightweight clothing and waiting a few minutes before getting into bed can make falling asleep more comfortable.

Drinking Throughout the Day Is Better Than Drinking Everything Before Bed

Staying hydrated is essential in hot weather, but waiting until bedtime to drink large amounts of water is not necessarily the best strategy.

It is preferable to drink regularly throughout the day, paying even greater attention to hydration when you are sweating heavily. Drinking a very large amount immediately before bed, on the other hand, may force you to get up several times during the night to use the bathroom, further disrupting your sleep.

On particularly hot days, you may also want to keep a glass or bottle of water beside your bed.

Be careful with alcohol as well. The initial feeling of relaxation can be misleading: alcohol is not a good solution for promoting restorative sleep and, during periods of very hot weather, it can contribute to dehydration.

What to Eat Before Going to Bed

A large, heavy dinner eaten very late can make a night that is already difficult because of the heat even more uncomfortable.

This does not mean that you have to live on salads throughout the summer. However, choosing balanced meals that are not excessively heavy can be helpful, particularly when you know you will be going to bed shortly afterwards.

Large amounts of caffeine in the evening can also interfere with sleep. When the weather is very hot, it is therefore worth considering your entire daily routine rather than focusing only on what you do during the final five minutes before turning off the light.

Sheets and Pyjamas Can Make a Big Difference

When we search for ways to sleep better in hot weather, we often immediately think about air conditioning while forgetting about the materials that remain in contact with our body for seven or eight hours.

Lightweight, breathable bed linen can significantly improve comfort. Fabrics such as cotton and linen are often popular during the summer because they tend to provide better breathability than materials that retain more heat and moisture.

The same principle applies to pyjamas.

Sleeping completely uncovered is not necessarily the best solution for everyone. One person may feel more comfortable under an extremely light sheet, while another may prefer no covering at all. The priority is to avoid creating a layer around the body that unnecessarily traps heat.

Create a Bedtime Routine

Our brains respond well to habits. Even in summer, when the days are longer and our schedules often become less regular, maintaining a certain degree of consistency can help improve sleep quality.

Whenever possible, try to go to bed and wake up at relatively regular times.

During the hour before bedtime, you can dim the lights, reduce particularly stimulating activities and spend some time doing something relaxing. A lukewarm shower, a few pages of a book or simply several quiet minutes can gradually become signals that tell your body it is time to prepare for sleep.

We cannot always eliminate the heat, but we can avoid adding other obstacles that make sleeping even more difficult.

Smartphones and Hot Weather: Not a Great Combination

When we cannot sleep, one of our most automatic reactions is to reach for our smartphone.

Five minutes become twenty, and twenty soon become forty. In the meantime, we continue receiving visual and mental stimulation and may end up focusing even more on the fact that we are still awake.

If our goal is to improve sleep quality, keeping the smartphone away from the bed and giving ourselves some time to unwind before sleeping can be helpful.

There is no need to create an elaborate bedtime ritual. The aim is simply to help the brain associate the bed primarily with rest and sleep.

What to Do If You Keep Waking Up During the Night

Waking up occasionally during a very hot night is not necessarily a cause for concern. However, if you repeatedly wake up throughout the night, start by checking your sleeping environment.

Has the room become warmer? Is the air completely still? Are your sheets too heavy? Did you drink alcohol? Did you eat a large meal very late?

If you wake up feeling overheated, you can take a few sips of water, gently cool your face and body and improve ventilation when the outdoor temperature makes it appropriate to do so.

Try not to check the clock repeatedly. Seeing that it is 2:17 a.m., then 2:43 a.m. and finally 3:08 a.m. is unlikely to help you relax.

When a Headache Shouldn’t Be Ignored

A headache during a very hot day can have many possible causes and should not automatically be blamed on lack of sleep.

If the headache or discomfort is accompanied by severe weakness, nausea, dizziness, confusion, a very high body temperature or other significant symptoms, it is important to consider the possibility of a heat-related health problem and seek appropriate medical assistance.

Particular caution is necessary for older adults, young children, people with chronic health conditions and those taking certain medications.

Likewise, if sleep problems continue even when temperatures fall, interfere with everyday life or are accompanied by very intense night sweats without an obvious environmental explanation, it is advisable to discuss the problem with your doctor.

How to Sleep Well in Hot Weather: Your Overall Strategy Matters

There is no miracle trick that can transform an unbearably hot room into a cool bedroom within seconds.

Knowing how to sleep when it’s hot means combining several small measures: protecting your home from direct sunlight during the day, ventilating it when the outdoor air is cooler, using a fan or air conditioning correctly, staying properly hydrated, choosing lightweight bedding and creating a relaxing evening routine.

The real difference often comes from combining all these simple habits.

So, if you want to sleep well in hot weather, don’t wait until you are already lying in bed feeling hot, sweaty and frustrated. Start several hours before bedtime: prepare your bedroom, reduce accumulated heat and give your body the time it needs to relax.

Read also: Sleep Better: 10 Habits That Improve Sleep and Energy

This post is also available in: Italiano (Italian)

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