As parents, we are constantly worrying whether our baby is too hot or too cold – particularly at night. 

Our little ones need to be at the right temperature when they’re sleeping to make sure they are safe, comfortable, and get a good night’s rest. If they get too hot, sleep can suffer, there’s the possibility of a heat rash, and research has found that overheating can put babies at a higher risk of SIDS. 

Babies can’t tell us when they are feeling too hot, so we need to be aware of the telltale signs to keep them safe and comfortable at bedtime. 

Why Do Babies Get Too Hot While Sleeping?

A baby’s temperature regulation and sweat glands have not yet fully developed, which means that they aren’t able to cool themselves down and body temperature can rise faster than an adult’s.

It’s very common for parents to worry that their bub is too cold at night, so they dress them in thick clothing, too many layers, and increase the heat in the nursery. While we don’t want our babies to be too cold either, it’s better to err on the side of caution and add layers depending on their temperature.

To help you understand how much your baby should be wrapped up at night, ask yourself, “Am I too hot?” and if it’s too hot for you, your baby is probably feeling the same.

What Temperature Should My Baby Be?

A normal temperature for babies is between 36 and 37 degrees Celsius. If your baby is more than 38 degrees Celsius, then their temperature is too high.

Your baby’s room should be around 20 to 22 degrees Celsius. You can keep the room cool by making sure air can circulate (open doors, air vents, windows), using a fan and/or air conditioning, and using blackout curtains or blinds to keep sunlight out during the day.

 How Do I Know If My Baby Is Overheating?

While your baby can’t verbally tell you that they are too hot, there are several signs that we can look out for. If you notice any of these things, it’s likely your baby is giving you signals that they are warm,  uncomfortable and might also be unwell.

• They are warm to the touch
• Flushed skin
• Red and hot ears
• Heat rash (small red spots on their body)
• Sweaty neck
• Fast breathing
• Racing heartbeat
• Unresponsive – being too hot may make your baby drowsy or go into a deeper sleep
• Fever
• Vomiting

 How Do I Make Sure My Baby Doesn’t Get Too Hot?

You can control your baby’s temperature through both layering and the room temperature. To prevent them from overheating, particularly during our hot Australian summers, you should: 

1. Avoid putting your little one in a hat or beanie while they’re asleep because it will prevent heat from escaping through their head. A hat could also fall and cover their face during the night and cause breathing difficulties.

2. Avoid synthetic fabrics for sleepwear and swaddles. Instead, opt for breathable, lightweight cotton layers that you can add or take away depending on your baby’s temperature.

3. Avoid loose blankets or other items in their cot or Moses basket – and never use an electric blanket. Too many items in their crib can cause overheating or breathing difficulties. A breathable sleeping bag or swaddle is a better option.

What Should I Do If I Notice My Baby Getting Hot?

If you spot your baby getting too hot, you can safely bring their temperature back down by:

• Offering fluids (breastmilk or formula if your baby is younger than 6 months)
• Taking off a layer or dressing them more lightly
• Cooling down the room – open doors and windows, use fans/air conditioning, keep blinds and curtains closed during the day to prevent sunlight from getting in
• Moving bub to a cooler room (lower floors and shaded rooms will be cooler)
• Bathing them in lukewarm water and/or applying a cool flannel or sponge to their forehead
• If these suggestions aren’t helping to bring your baby’s temperature down, it may be a sign they’re unwell. Trust your instincts and reach out for medical advice if you’re worried.

If you would like more guidance on safe sleeping habits for your baby, Mindful Mum can help you establish a healthy routine that keeps your little one comfortable, safe, and well-rested. Get in touch today to learn more about my sleep consulting services.