TinyLayers guide
Best Room Temperature for a Sleeping Baby
Quick answer
UK safe-sleep bodies often cite about 16–20°C. Slightly warmer is workable if you dress lighter.
- Aim comfortably cool, not toasty
- If you can’t move the thermostat, move the layers
- Chest check settles the debate
Where 16–20°C comes from
The Lullaby Trust and NHS name a comfortably cool range tied to reducing overheating risk. The AAP emphasizes avoiding overheating rather than one magic number.
This is general dressing guidance, not medical advice. Every baby is different — for fever, premature birth, or any medical concern, follow your clinician.
Frequently asked questions
Is 22°C too warm for baby sleep?
Workable with lighter layers — often a 1.0 TOG sack with a short-sleeve bodysuit. Confirm with the chest check.