What Should My Baby Wear to Sleep?

One of the questions I'm asked most often by parents is, "How do I know if my baby is too hot or too cold at night?"

It's completely understandable. As a new parent, you want your little one to be comfortable, but it can be difficult to know how many layers they really need.

The good news is that keeping your baby comfortable doesn't have to be complicated.

Start with the Room Temperature

The first thing to consider is the temperature of your baby's room. The recommended room temperature for sleep is between 16°C and 20°C, so a room thermometer can be a helpful addition to your nursery.

Once you know the room temperature, you can choose your baby's sleepwear accordingly. Many baby sleeping bags include a tog rating and guidance on what your baby should wear underneath, making it much easier to dress them appropriately.

A Simple Rule: Avoid Overheating

It's natural to worry that your baby might be cold, but babies are actually more at risk from becoming too hot than too cold during sleep.

A good way to check whether your baby is comfortable is to feel their chest or the back of their neck. If they feel warm but not sweaty or clammy, they're likely dressed appropriately. Hands and feet often feel cooler than the rest of the body, so they aren't the best indicator of your baby's temperature.

Keep Sleep Safe

Whatever your baby wears, remember that their sleep space should remain clear. Avoid hats indoors during sleep, and don't add extra blankets over a baby sleeping bag. If you're using blankets instead, they should be lightweight, securely tucked in, and no higher than your baby's shoulders.

Every Baby is Different

Just like adults, some babies naturally run warmer or cooler than others. If you're ever unsure, it's perfectly okay to make small adjustments and check how your baby feels rather than relying on guesswork.

At Nurtured to Sleep, I believe confident parenting starts with clear, evidence-informed guidance. My goal is to help you feel reassured—not overwhelmed—so you can make decisions that support both your baby's wellbeing and your own peace of mind.

For the latest guidance on dressing your baby safely for sleep, I recommend visiting The Lullaby Trust, whose safer sleep advice is based on the latest research.

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Why Is a Bedtime Routine So Important?

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Safer Sleep: The Foundations Every Parent Should Know