We love the summer but we don't really love the effect it has on our sleep. Sheets kicked off at 2am, fan pointed directly at our face, debating googling "how to sleep when it's hot". Hideous.
The science of why it's so hard to sleep in the heat is kind of depressing. Once your room goes above 24°C, your deep sleep phases drop by 25 to 40%. That's why even though you've clocked eight hours it still feel like you've been awake all night, your body is being cheated out of the good stuff. Heat also spikes cortisol, which explains the brain fog, the irritability and the wanting to snap at people for breathing too loudly. Blame the weather.
The good news is there's a fix for most of it. A few things that do actually work, no expensive AC unit required.
Close the curtains during the day. We know, you want the light, the view, the summer feeling. But your bedroom walls are literally absorbing and storing heat all day and releasing it all night while you try to sleep in what is essentially turning your bedroom into a slow cooker. Curtains closed, especially on south-facing windows, makes a significant difference by bedtime. You can have all your daylight in the living room.
Sort the room before you sort yourself. Rooms on the ground floor or north-facing side of the house tend to stay cooler during a heatwave so if you can relocate for a short time it will help. Appliances like ovens, dryers and dishwashers all add heat to the space, so if you've been cooking and drying laundry indoors at 7pm, that's working against you. Run that stuff earlier in the day if you can.
Lukewarm shower before bed, not cold. This feels counterintuitive but a cold shower actually triggers your body to generate more heat in response. Lukewarm is the move, it lowers your core temperature without the rebound effect, and you'll feel noticeably cooler getting into bed.
Freeze your pillowcase. Put it in a zip-lock bag in the freezer for twenty minutes before bed. It doesn't stay cold all night, but it doesn't need to, you just need to get to sleep in the first place and the rest follows. Ridiculous and completely effective.
The cold towel backup. Damp towel on your wrists and the back of your neck, where blood runs closest to the surface, and your whole body temperature feels cooler instantly. Keep one in a bag with some ice packs by the bed for the 3am wake up. You'll feel like you invented medicine.
Your bedding might be part of the problem. Linen is the best option for airflow, bamboo and cotton percale are also both pretty good. Anything synthetic is a heat trap and you already know how we feel about synthetics. If you've been waking up damp and furious, check the fabric composition.
The temporary sleep divorce. Two bodies in a bed during a heatwave is double the heat and half the sleep. A few nights in the spare room is a weather decision, not a relationship one. If that feels too dramatic, at minimum get separate duvets — the Scandinavian approach and honestly one of the best kept secrets in couples sleeping regardless of season.
Drink more water than you think you need. Dehydration is an obstacle to good sleep, even though researchers haven't fully pinned down why, but the link between poor hydration and poor sleep keeps showing up. Keep water within reach and sip all day or if you love a tracker like us, download a water tracking app, sometimes its surprising how little we've drank.
If you're also dealing with travel fatigue on top of all of this, just got back from somewhere gorgeous, still adjusting, the same rules just apply with more diligence. Your body's already working overtime to reset its clock; don't make it fight the temperature on top of that. Hydrate more, cool the room before you attempt sleep, and don't be precious about an early night to catch up.
This heat isn't going anywhere immediately, so consider this less of a one-off survival guide and more of a new summer baseline. Your sleep will thank you. Eventually.