
Deciding what to dress your newborn in for sleep can be a challenge, especially in varying temperatures. The ideal room temperature for a baby is 16–20°C. At this temperature, your baby should wear a vest, sleepsuit, and a lightweight sleeping bag. If the room is warmer, a light onesie or just a nappy with a sheet may be enough. If the room is cooler, you can add a long-sleeved bodysuit or pyjamas and a higher tog sleeping bag. It's important to avoid overheating, as this increases the risk of sudden infant death syndrome (SIDS).
| Characteristics | Values |
|---|---|
| Room temperature | 16-20°C |
| Bedding | Light bedding or a lightweight, well-fitting baby sleep bag |
| Clothing | A vest, sleepsuit, or a nappy with a sheet |
| Sleeping bag | A snug, well-fitting bag with a tog rating suited to the season |
| Blankets | Lightweight cellular blankets, not thick, fleecy, or padded blankets |
| Sheets | Lightweight, firmly tucked in no higher than the baby's shoulders |
| Additional layers | If the room is below 20°C, consider a long-sleeve bodysuit or pyjamas |
| Overheating | Avoid; it increases the risk of sudden infant death syndrome (SIDS) |
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What You'll Learn
- Room temperature for newborns should be 16-20°C
- Newborns should wear a vest, sleepsuit and a lightweight sleeping bag
- If the room is 22°C, a 1.0 tog sleeping bag and a long-sleeved bodysuit are ideal
- Signs your baby is too hot include flushed cheeks and sweaty hair
- If your baby is unwell or feverish, they don't need extra clothes

Room temperature for newborns should be 16-20°C
Keeping your newborn baby's room at the right temperature is important for their comfort and safety. The recommended room temperature for a newborn is between 16°C and 20°C.
This temperature range is considered safe and comfortable for sleeping babies. It is important to maintain a cool but comfortable environment for your newborn as it helps to reduce the risk of overheating, which has been linked to Sudden Infant Death Syndrome (SIDS). Overheating can lead to deep sleep, from which it is difficult for a baby to wake.
To achieve the ideal room temperature, you can use a baby room thermometer or a phone app to monitor the temperature. If the room feels too warm or chilly for you, it is likely that your baby will feel the same. You can adjust the temperature by turning down the thermostat or using air conditioning if available.
At this recommended room temperature, your baby's sleepwear can be adjusted accordingly. They can wear a vest, sleepsuit, and a lightweight sleeping bag or well-secured sheet. You can add or remove layers depending on their comfort. It is important to remember that your baby's comfort and safety are the priorities, so observing for signs of overheating or being too cold is crucial.
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Newborns should wear a vest, sleepsuit and a lightweight sleeping bag
Newborns have an immature thermoregulatory system, meaning they struggle to regulate their body temperature. This can be a constant worry for new parents, especially during the colder winter months.
The ideal room temperature for a baby is 16–20°C. At this temperature, your newborn should wear a vest, a sleepsuit, and a lightweight sleeping bag. A sleepsuit is a safe option, and a sleeping bag is a safe alternative to blankets, which can pose a risk of suffocation.
If the room is 20°C, your baby should wear a long-sleeved vest and a 2.5 tog sleeping bag. If the room is 18°C, they should wear a long-sleeved vest, pyjama top, and a 2.5 tog sleeping bag. If the room is 16°C, they should wear a long-sleeved vest, a sleepsuit or pyjama set, and a 2.5 tog sleeping bag.
If the room is warmer than 20°C, your baby may not need any bedclothes other than a sheet. On warm nights, a nappy and a lightweight, securely fitted sheet can be enough.
It's important to keep an eye on your baby's comfort and adjust their outfit accordingly.
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If the room is 22°C, a 1.0 tog sleeping bag and a long-sleeved bodysuit are ideal
When it comes to putting your newborn down for a comfortable and safe sleep, it's important to consider both the room temperature and their comfort. The ideal room temperature for a baby is between 16°C and 20°C. If the room is 22°C, which is slightly above the ideal temperature, a 1.0 tog sleeping bag and a long-sleeved bodysuit are ideal.
A baby sleeping bag with a 1.0 tog rating is designed to provide warmth without the risk of loose blankets or sheets accidentally covering your baby's head. The sleeping bag should fit snugly around your baby's shoulders to prevent the risk of their head slipping down.
Long-sleeved bodysuits are a good option to pair with the sleeping bag as they provide an extra layer of warmth while still being lightweight and breathable. This combination will help to ensure your baby stays comfortable and safe throughout the night.
Remember, it's important to keep an eye on your baby's comfort and adjust their clothing or bedding as needed. All babies are different, so closely observe for signs of overheating or being too cold, and adjust their outfit accordingly. For example, if your baby's cheeks are flushed or they have sweaty hair, these could be signs that they are too warm.
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Signs your baby is too hot include flushed cheeks and sweaty hair
When it comes to newborns, it's important to remember that they are unable to regulate their body temperature and release heat rapidly, so they can easily overheat. This is why it's crucial to monitor your baby for signs of overheating, such as flushed cheeks and sweaty hair. Here are some detailed guidelines to help you recognise these signs:
Firstly, flushed cheeks are a common indicator that your baby is too hot. Flushed skin is a sign of overheating, and it can be observed not only on the cheeks but also on other areas of the body. If you notice that your baby's skin appears redder or more flushed than usual, it's a sign that their body temperature is elevated.
Sweaty hair is another tell-tale sign that your baby is too warm. Babies have immature thermoregulatory systems, which means they struggle to regulate their body temperature and tend to sweat less than adults. As a result, they may not appear to sweat much, but if you notice damp hair or sweat on their scalp, it indicates that they are too hot.
In addition to flushed cheeks and sweaty hair, there are other symptoms of overheating to watch out for. These include rapid breathing, heat rash (prickly heat), and excessive sweating. Heat rash usually appears as little red dots or irritated hair follicles on the neck, armpits, chest, back, elbows, or thighs. It can be accompanied by fever, chills, and bumps.
To prevent overheating, it's recommended to keep your baby's room temperature between 16°C and 20°C. You can use a baby room thermometer to monitor the temperature accurately. Additionally, follow safe sleep guidelines by using lightweight sleepwear, such as a well-fitting baby sleeping bag with a tog rating suited to the season. Remember, it's safer for your baby to be cooler rather than too hot.
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If your baby is unwell or feverish, they don't need extra clothes
When it comes to newborns, it's important to remember that they are unable to regulate their body temperature effectively and can overheat quickly. This is why it's crucial to avoid overdressing your baby, especially when they are unwell or feverish.
If your baby is unwell or has a fever, it is generally recommended to keep their clothing light and breathable. Their bodies are already working hard to fight off infection, and adding extra layers can make it more challenging for them to cool down. It is best to opt for lightweight, breathable fabrics such as cotton, and stick to one or two layers, depending on the season. You can adjust the room temperature by opening a window or adjusting the heating to ensure they are comfortable.
It is important to monitor your baby's temperature and look for signs of overheating or discomfort. A high temperature in babies is typically considered 38°C or above, and they may exhibit flushed cheeks, sweaty hair, or clammy skin. If you notice any of these signs, it is important to remove some of their clothing or bedding. Additionally, it is recommended to offer them regular drinks of cool water or juice to help them stay hydrated.
While it may be tempting to bundle up your baby when they are unwell, it is essential to remember that their comfort and safety are the top priorities. Overheating can increase the risk of sudden infant death syndrome (SIDS), so it is always better to keep them cooler rather than too hot. By following these guidelines and staying vigilant, you can help ensure your baby's comfort and well-being during their illness.
Remember, if you are ever concerned about your baby's health or their fever persists, don't hesitate to seek medical advice from your healthcare provider.
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Frequently asked questions
The ideal room temperature for a baby is 16-20°C. At this temperature, your baby should wear a vest, sleepsuit and have a lightweight sleeping bag. If the room is warmer than 20°C, a short-sleeved bodysuit and a lower tog sleeping bag are recommended. If the room is cooler than 16°C, a long-sleeved bodysuit and a higher tog sleeping bag are recommended.
A tog is a measure of thermal resistance, also known as thermal insulance. The higher the tog rating, the warmer the product.
If your baby's cheeks are flushed or they have sweaty hair, these are signs that they are too hot. You can also check the back of their neck or their tummy — if their skin feels damp, they may be too hot.
The NHS advises that any blankets should be lightweight cellular blankets and firmly tucked in no higher than your baby’s shoulders, lying flat below the arms to prevent them from wriggling down during the night. Sleeping bags for babies, or wearable blankets, are designed to provide warmth without the risk of loose blankets or sheets accidentally covering your baby’s head.
If your baby doesn't like a sleeping bag, you can use blankets instead. However, never use both as this is an overheating risk.









































