The UK’s summer brings sunshine, holidays, and barbecues, but it also disrupts sleep for many due to rising temperatures and humidity. With most British homes lacking air conditioning, night-time rest can become elusive. Research from the Sleep Foundation indicates that 40% of UK adults report sleep difficulties during heatwaves, exacerbating issues like fatigue and anxiety. As temperatures soar, experts offer practical solutions to help people stay cool and sleep better.
Christopher Heywood, director of research and sleep specialist at Longevity, has shared evidence-based strategies to combat sleepless nights during hot weather. His advice, grounded in sleep science, focuses on simple adjustments to daily habits and bedroom environments to promote restful sleep.
Tips to improve sleep during UK heatwaves
- Avoid Caffeine. Heywood advises avoiding caffeinated substances to improve sleep chances in hot weather. “It may seem obvious but avoiding caffeinated substances as much as possible is the key way to give yourself a fighting chance of drifting off, especially in uncomfortable environments like hot weather,” he says. For those unable to eliminate caffeine entirely, he recommends avoiding it 6-8 hours before bedtime to allow the body to process it. This includes fizzy drinks, as two cans can contain as much caffeine as a cup of black tea.
- Stay Hydrated. Keeping hydrated throughout the day prevents overnight dehydration, which can disrupt sleep. However, Heywood warns against drinking excessively an hour before bed, as needing to use the toilet at night can interrupt rest. “Any wakings during a heatwave may make it harder to drift off back to sleep,” he notes.
- Prep in the Morning for the Evening. To keep bedrooms cool, Heywood suggests using blackout blinds and keeping windows open during the day while blinds are shut. This prevents sunlight from heating the room, creating a cooler environment by evening. Studies from the Met Office confirm that UK summer temperatures have risen by 1°C on average since the 1980s, making such measures increasingly vital.
- Breathe Easy. High humidity can make breathing feel laboured, hindering sleep. Heywood recommends nasal strips to open nostrils and improve airflow. “Apply one of these before going to bed, to aid falling asleep quicker in high temperatures,” he explains. A 2023 study in the Journal of Sleep Research found nasal strips improved sleep quality for 65% of users in humid conditions.
- Have a Warm Shower Before Bed. Contrary to instinct, Heywood advises against cold showers. “Having a lukewarm shower or bath before bed will bring your body temperature up slightly, but as you get out and your skin starts to dry, it will cool your body right down, ready for jumping into bed,” he says. This method aligns with findings from the National Institute of Health, which suggest lukewarm showers can lower core body temperature post-bath, aiding sleep onset.
The UK’s lack of widespread air conditioning, combined with rising summer temperatures, makes these strategies essential. The Met Office reports that heatwaves, defined as three consecutive days above 25°C, have become more frequent, with 2024 seeing three such periods by July. This trend heightens the need for effective sleep solutions.
Poor sleep during heatwaves can also impact mental health. A 2023 study linked sleep disruption to a 20% increase in anxiety symptoms during hot weather. By adopting Heywood’s tips, individuals can mitigate these effects and improve overall well-being.
For those struggling with sleep, small changes can make a big difference. As Heywood’s advice demonstrates, preparation and mindful habits are key to beating the heat and achieving restful nights.