What temperature should a baby bath be?
A baby's bath water should feel comfortably warm, not hot. A temperature reading is only a guide: mixing and checking the water before your baby gets in matter too.
A useful guide for baby bath water is around body temperature, approximately 37–38°C. This range appears in current NHS Greater Glasgow and Clyde neonatal guidance, but it is an approximate guide rather than a universal safety limit or a guarantee of comfort.
Before your baby gets in, have everything you need ready, run cold water first and then add hot water. Mix the whole bath thoroughly and check it with your elbow immediately before entry. It should feel comfortably warm or lukewarm, not hot or cold. If it feels too hot, keep your baby out, add cold water, mix and check again.
No temperature reading or device replaces close, continuous supervision. Stay beside your baby and close enough to reach throughout the bath. If your baby was born prematurely, is clinically unwell or has an individual care plan, follow the advice of their neonatal or healthcare team instead of relying on general guidance alone.
What the 37–38°C guide for baby bath water means
The approximate 37–38°C range is a practical way to describe water that is around body temperature. It is not a pair of hard cut-offs, and a reading inside the range does not prove that the whole bath is evenly mixed, safe or comfortable.
The number also needs context. The current NHS Greater Glasgow and Clyde recommendation comes from neonatal clinical guidance, while the national NHS advice on bathing your baby focuses on how the water feels and how it is checked. That is why an approximate temperature and a physical check belong together.
What the water should feel like
After mixing the whole bath, dip your elbow into the water immediately before your baby goes in. The water should feel comfortably warm or lukewarm against your skin, neither hot nor cold. Even when the water feels right, stay beside your baby and close enough to reach throughout the bath.
How to prepare, mix and check the water before your baby gets in
Keep the pre-bath routine short and consistent:
•Gather the towel and other essentials before your baby enters the bath.
•Run cold water first, then add hot water.
•Mix the water through the whole bath so there are no hot patches.
•Check the mixed water with your elbow immediately before putting your baby in.
If the water feels too hot before your baby gets in
Keep your baby out of the bath. Add cold water, mix the whole bath thoroughly and check it again with your elbow. Do not rely on a fixed waiting time or a surface-only check to decide that the whole bath is ready.
These steps are for water that feels too hot before your baby gets in; they are not first aid. If your baby may already have touched hot water or been scalded, start the cooling steps in the care section straight away.
Temperature checks do not replace close supervision
Water-temperature checks help with one part of bath safety. They do not prevent the separate risk of a baby being left alone in water. The NHS says never to leave a baby alone in the bath, not even for a second.
Stay beside your baby throughout the bath
Remain in the room, watch your baby and stay close enough to reach them at all times. If you must leave, take your baby out of the bath and with you. A bath seat or support does not replace an adult's presence or allow hands-off supervision.
Do you need a bath thermometer?
No. You can follow the guidance on mixing and checking the water without buying a thermometer. A bath thermometer is optional, and it does not replace mixing the whole bath, checking the water with your elbow immediately before entry or staying beside your baby.
Treat the displayed number as an extra check, not proof that the water is evenly mixed or safe. Keep using the same mixing, elbow-check and supervision steps whether or not you use a thermometer.
What to do if your baby may have been scalded
Do not wait to judge how serious a possible scald looks. Follow the child-specific NHS first-aid advice and start cooling the affected area straight away:
•Hold the affected area under cool running water for 20–30 minutes.
•Remove nearby loose clothing or jewellery, including a nappy if it is near the injury, but do not pull away anything stuck to the skin.
•Do not use ice or very cold water.
•Keep the rest of your baby warm while cooling the affected area.
•After cooling, cover the area loosely with cling film laid over it or clean, non-fluffy material. Do not wrap cling film tightly around the injury.
These steps give immediate first aid; they do not tell you how serious the burn is or replace professional advice.
When to call NHS 111 or use emergency care
Begin cooling first. As your baby is under 5, call NHS 111 for advice about a burn or scald, or call whenever you are unsure what to do. The current NHS burns and scalds guidance says to call 999 or go to A&E if the burn looks very large or deep, or is on the face, genitals or bottom. If you are uncertain about severity, use NHS 111 rather than trying to diagnose the injury yourself.
When your baby's healthcare plan comes first
This article gives general UK information, not an individual bathing or medical plan. If your baby was born prematurely, is clinically unwell or is medically vulnerable, follow the neonatal or healthcare team's advice. If the bathing plan is unclear, ask the team caring for your baby; do not use this general guidance to choose a different temperature or routine yourself.
