Temperature and sleep

The temperature of your environment and your body temperature both play a crucial role in sleep quality. Understanding how temperature affects your sleep can help you create an optimal sleep environment and build better sleep habits. In this post we discuss the influence of temperature on sleep, the role of your core temperature, and offer practical tips for feeling sleepy in the evening and fresh and alert in the morning.

How temperature affects your sleep

Our body temperature follows a daily rhythm that is closely linked to our sleep-wake cycle. Throughout the day, body temperature rises and reaches its peak in the late afternoon. In the evening it begins to fall — a signal to your body that it is time to sleep. A cool environment helps support this drop and promotes deep, restorative sleep.

• Cool room temperature: A lower ambient temperature helps your body cool down and prepare for sleep. The ideal bedroom temperature is between 16 and 19 degrees Celsius (60–67 degrees Fahrenheit).
• Core temperature: Your core temperature falls during the night and reaches its lowest point in the early morning hours. This drop is essential for initiating and maintaining good sleep.

Tips for regulating your temperature for better sleep

Cool your bedroom

A cool bedroom is essential for good sleep. Make sure your room is dark and cool to create ideal sleep conditions.

Tips:

• Use a fan or air conditioning to lower the room temperature.
• Open a window to let in fresh air.
• Use breathable bedding materials such as cotton or linen to prevent overheating.

Take a warm shower or bath before bed

Although it may seem counterintuitive, a warm shower or bath can actually help you cool down. Once you step out of the warm water, your body temperature drops quickly, which helps you feel sleepy.

Tips:

• Take a warm shower or bath about 1–2 hours before bed.
• Enjoy a relaxing bathing routine with calming scents such as lavender for extra relaxation.

Choose the right bedding and pyjamas

The materials you choose for your bedding and pyjamas can make a significant difference to how comfortably you sleep.

Tips:

• Choose lightweight, breathable bedding.
• Wear loose, breathable pyjamas made from natural fibres such as cotton.
• Avoid heavy duvets and synthetic materials that trap heat.

Wear bed socks

Stay hydrated, but not excessively

Hydration is important, but drinking too much water just before bed can disrupt your sleep.

Tips:

• Drink enough water throughout the day to stay hydrated.
• Limit your fluid intake in the evening to avoid getting up in the night.

Use temperature to wake up in the morning

Just as a drop in temperature helps you fall asleep, a rise in temperature can help you wake up in the morning.

Tips:

• Take a cold shower in the morning to boost alertness and wake your body up.
• Get exposure to natural light in the morning to help your body wake up.

The role of core temperature in sleepiness and wakefulness

Your core temperature plays a key role in your sleep-wake cycle. By helping your body cool down in the evening, you prepare yourself for sleep. In the morning, a rise in body temperature helps you wake up and feel alert.

• Evening routine: Helping your body cool down in the evening can stimulate melatonin production — the hormone that helps you fall asleep.
• Morning routine: Raising your body temperature in the morning can stimulate cortisol production — the hormone that helps you wake up and stay alert throughout the day.

Conclusion

The temperature of your environment and your body temperature both play a crucial role in sleep quality. By keeping your bedroom cool, taking a warm shower or bath before bed, and choosing the right bedding and pyjamas, you can optimise your sleep environment. Experiment with these tips and discover how regulating your temperature can help you achieve better sleep.