How to Sleep Cool on Hot Summer Nights

We all know the basics: keep the room cool, ditch heavy blankets, and avoid late-night workouts. But what if you’ve already tried all the obvious tricks and still wake up sweaty or restless?

If you're a hot sleeper—or just trying to survive summer nights without tossing and turning—here are five research-backed and surprisingly effective tips for keeping cool at night.

Beat the heat and wake up refreshed—no AC required.

1. Cool Your Core with a Warm Shower (Yes, Really)

It might sound counterintuitive, but science says: taking a warm (not cold!) shower 60–90 minutes before bed actually helps your body cool down.

Why it works: A warm shower dilates blood vessels near the skin, increasing heat loss and lowering your core temperature as you dry off. This natural drop in body temp signals your brain it's time to sleep.

Bonus tip: Let your body air-dry slightly before toweling off—evaporation helps with extra cooling.

2. Use a Cooling Sleep Surface—Under You

Most people focus on breathable sheets and comforters. But your mattress or mattress protector could be the hidden culprit.

Memory foam traps heat, while natural latex or hybrid mattresses tend to breathe better. You can also add a cooling mattress pad made of phase-change materials (PCMs) that absorb body heat as you sleep.

Studies show the temperature directly under your back matters just as much as ambient room temperature when it comes to uninterrupted sleep.

3. Choose Sleepwear That Works Like Climate Control

Not all pajamas are created equal. Many common fabrics—like cotton or silk—absorb moisture but trap heat, leading to a clammy feeling. The secret? Sleepwear designed with thermo-regulation in mind.

That’s where the Dagsmejan Stay Cool Collection comes in.

Engineered with botanic fibres like eucalyptus and advanced knitting technology, this collection:

• Releases excess heat 8x more than cotton

• Dries in 1/3 of the time

• Keeps you in the ideal sleep temperature zone all night

The result: less sweating, fewer wake-ups, and better sleep. And thanks to its ultra-light feel, you’ll barely know you’re wearing anything at all. That's what makes it the ideal summer pajamas.

4. Elevate Your Feet to Cool Down Faster

Circulation affects temperature regulation. When your feet are flat, heat can pool in the lower extremities. Elevating your feet slightly with a pillow or folded towel helps promote blood flow and dissipate excess heat.

According to sleep researchers, even a few degrees of temperature change in your feet can trigger drowsiness and deepen sleep stages.

This trick is especially helpful if you’re sleeping in a warm room or experiencing night sweats.

5. Eat Your Way Cooler—At Dinner

Believe it or not, your evening meal can influence how hot you feel at night. Foods high in protein (like red meat) take more energy to digest, a process called diet-induced thermogenesis—aka your body literally heats up to process them.

What to do instead:

• Eat lighter, plant-forward meals at dinner (think grilled vegetables, whole grains, and legumes)

• Avoid spicy or heavy foods 3 hours before bed

• Try hydrating foods like watermelon, cucumber, or berries for dessert

Staying cool can start at the table.

Don’t Just Sleep—Sleep Smart

Temperature is one of the biggest drivers of sleep quality. And with summer heat, stress, and travel, it’s more important than ever to create the right sleep environment.

By combining science-backed strategies with smart sleepwear—like the Dagsmejan Stay Cool Collection—you can stay comfortable all night and wake up energized.

Because cool sleep isn’t just a luxury—it’s a game-changer.

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