How to Keep Baby Cool During Summer Sleep
Summer brings longer days, warmer temperatures, and sometimes more challenging baby sleep. If your baby seems restless at bedtime, wakes more often overnight, or starts waking early in the morning, a warm sleep environment may be part of the problem.
The good news is that a few simple changes can help your baby sleep more comfortably during hot summer months. When it comes to baby sleep, cooler is generally better than too warm.
Aim for a Cool, Comfortable Sleep Space
Most babies sleep best in a room that feels comfortably cool rather than warm or stuffy. A sleep space around 68–72°F is often ideal, but every home and baby is different.
Rather than focusing only on the thermostat, check your baby’s chest or the back of their neck. If they feel sweaty, hot, or flushed, they may be overdressed or their room may be too warm. Hands and feet can feel cooler than the rest of the body, so they are not always the best indicator.
Dress Baby in One Lightweight Layer
In warm weather, less is often more. A simple cotton onesie or lightweight sleeper may be all your baby needs underneath their sleep sack.
Avoid heavy pajamas, fleece, thick swaddles, hats, loose blankets, or extra layers in the crib. Overheating can make sleep uncomfortable and lead to more frequent wake-ups.
A helpful rule of thumb is to dress your baby in one light layer more than you would wear comfortably in the same room. If you are comfortable in lightweight pajamas, your baby may be comfortable in a cotton sleeper and a lightweight sleep sack.
Choose Cotton or Muslin Sleep Sacks
A breathable sleep sack can help your baby stay comfortable while still following safe sleep guidelines. Cotton and muslin are great options for summer because they are lightweight and allow more airflow than heavier materials.
Look for a low-TOG sleep sack designed for warm weather. If your baby is very young and still needs to be swaddled, choose a lightweight, breathable swaddle and be sure to stop swaddling once they show signs of rolling.
Use a Fan for Air Circulation
A fan in your baby’s room can help keep air moving and prevent the room from feeling stuffy. It can also create consistent white noise that supports sleep.
Place the fan across the room or point it toward a wall so it circulates air without blowing directly on your baby. Keep cords safely out of reach and make sure the fan is secure.
Keep Shades Closed During the Day
Sunlight can quickly heat up a nursery, especially in rooms with large windows or afternoon sun. Closing blackout shades or curtains during the day can help block heat and keep the room cooler before bedtime.
Blackout shades also support healthy sleep by keeping the room dark for naps, bedtime, and early morning hours. This can be especially helpful during summer when the sun rises early and sets late.
Remember: Cool Is Better Than Too Warm
Many parents worry that their baby will be cold at night, but babies often sleep better in a slightly cool room than in an overly warm one. It is usually easier to add one light layer if needed than to help an overheated baby settle back to sleep.
If your baby is waking more frequently, sweating, or seems uncomfortable at bedtime, try simplifying their sleep clothing and cooling the room before making major changes to their schedule.
Need Help With Summer Sleep?
Warm weather, travel, changing routines, and early sunlight can all affect baby sleep during the summer. If naps, bedtime, or early morning wake-ups have become difficult, personalized sleep support can help you create a plan that works for your family.
Text or email today to schedule a sleep assessment call and get support for more restful summer nights.
