A room temperature of 16-20°C, with light bedding or a lightweight well-fitting baby sleep bag that is comfortable and safe for sleeping babies.
It can be difficult to judge the temperature in the room, so use a room thermometer in the rooms where your baby sleeps and plays. A simple room thermometer is available from The Lullaby Trust online shop. For more information please call 020 7802 3200.
Advice on room temperature is intended as a guide. Every baby is different, so while it’s important to be informed about overheating you need to check your baby regularly to see if he or she is too hot. Feel the baby’s tummy or the back of their neck (your baby’s hands and feet will usually be cooler, which is normal). If your baby’s skin is hot or sweaty, remove one or more layers of bedclothes.
Babies who are unwell need fewer, not more bedclothes. Babies do not need to wear hats indoors, nor sleep under a duvet or quilt.
The Lullaby Trust, ‘Safer Sleep for babies: a Guide for Parents’,