Mother and Baby

The best baby bath thermometers to ensure your baby is safe

Section: Baby
Baby bath thermometer

It’s hard to judge by touch whether or not the temperature of the bathwater is safe for your baby, which is where baby bath thermometers come in. A crucial piece of baby equipment, a bath thermometer, will let you know whether the temperature of your baby’s bathwater is safe.

The best baby thermometers in this article at a glance: 

  • The best baby rubber duck bath thermometer: TensCare Digi Duckling Digital Water Thermometer
  • The best baby bath thermometer with clock: Nuby Turtle Bathtime Clock and Thermometer
  • The best baby bath thermometer under £5: Munchkin Hot Safety Bath Duck
  • The best baby bath thermometer card: Duck Baby Bath Thermometer Card
  • The best baby bath thermometer for storing in the bathroom: Skip Hop Moby Floating Bath Thermometer
  • The best baby bath thermometer for crocodile fans: Dreambaby Room and Bath Thermometer
  • The best multipurpose bath thermometer over £10: Philips Avent Bath and Room Thermometer

What temperature should my baby’s bath water be?

The ideal temperature for a baby’s bath is around 36-38°C which is around body temperature. The water should feel neither hot nor cold. It’s a good idea to put cold water in the bath first, then add hot water before mixing the water well to ensure there aren’t any hot spots.

It’s also important not to put your baby in the bath while the water is still running, as the temperature can quickly change. Never leave your baby unattended in the bath, not even for a second, even if there is an older child in the bathtub or you are using a bath seat.

How deep should my baby’s bath water be?

For newborns and babies up to six months, the water should be around five inches deep, or just enough for your baby to settle in the water with their shoulders covered. For older babies and children, the bath should never be more than waist-high when your children are sat down.

What are the best baby bath thermometers on the market?

With plenty of different bath thermometers to choose from, we’ve come up with a few of our favourites here:

The best baby bath thermometers

The best baby rubber duck bath thermometer

Everyone loves a rubber duck and this classic looking digi duckling will not disappoint. The friendly-looking water thermometer allows you to see the temperature of the bath water at a glance, with a red warning light that illuminates when the water temperature is too hot. The duck automatically turns off after an hour and blends in well with your baby’s other bath-time toys.

Review: "We use this every bath to make sure the water is safe temp for baby. When you're a new parent this is invaluable. It has a flashing light and the word hot in bold if it’s too hot and then the word cold with no light if it’s too cold. It will have neither and just show temp on ideal temperature which ranges from 35-38 but we usually stick to 36-37. You have to give the temp a tap on the hand to get to work each time- we didn’t realise this and just thought it would work by emerging in water- always read the instructions!"

The best baby bath thermometer with clock

One of the cutest thermometers we’ve ever seen, the Nuby Turtle Bathtime Clock and Thermometer is a clock, timer and thermometer all in one. The turtle flashes and beeps when your baby’s bath water gets too hot and the temperature can be clearly seen on the easy-to-read display. There’s no certain amount of time your baby should spend in the bath, but the timer and clock come in handy if you want to monitor how long you’ve been splashing around and having fun!

Review: "I bought this for my 11 week old daughter as I was never sure just how hot her bath should be. Upon using it and running the water to the recommended temperature, I did feel like it was too hot for her even though the unit said otherwise. I checked it against my Growegg room thermometer and it showed it was accurate so I guess it must be my perception of heat that was off. I like that it has automatic sensors that turn the thermometer on as soon as it hits water and also has a countdown and timer function. The sound and flashing light alarms for when the water is too hot/cold is also reassuring."

The best baby bath thermometer under £5

Unlike other bath thermometers in this list, the Munchkin Hot Safety Bath Duck does not tell you the exact temperature of the water, instead it displays clearly whether the water is too hot or not. The white-hot marker on the bottom of the duck turns white to reveal the word ‘HOT’ when the bath water is too hot. It’s a fun toy for your little one to play with and is water-tight to prevent mildew, however not knowing the exact temperature can be a drawback.

Review: "Bought this rubber duck after getting a batch of smaller ones with holes in the bottom for a squeaker. Realised soon enough that this creates a great space for mold to grow, and bath time then turns into sitting in dirty water. So wanted a duck with no option for mold to build up or get into any holes etc. This does the job and is a good size, will probably buy more once daughter is a little older."

The best baby bath thermometer card

If your bathroom is already full of bath toys, or you’re looking for a bath thermometer that can easily be transported on holiday, a bath thermometer card is a good investment. Unlike others on this list, you can’t leave it floating in the bath with your baby, but it’s large Liquid Crystal display tells you at a glance whether or not the bath water is safe. With no moving or breakable parts, and no need for batteries, it’s a good thermometer to pack in your suitcase or leave at grandparent’s house.

Review: "I had this for my first and bought it again for my second. Easy to use, accurate and very good value. You definitely don’t need to buy the battery powered ones as this does the job at a third of the price."

The best baby bath thermometer for storing in the bathroom

Another adorable bath thermometer, this cute whale from Moby is a dream to store thanks to its clever suction pads, allowing you to stick it to your bathroom wall, with the tail acting as a wash cloth hook. The colour changing LED means the whale will change colour if the water is hot, cold or just right. It comes as part of a cute whale themed set of bath products from Skip Hop, and we love how friendly and appealing it looks to little ones.

Review: "It's decent.... clear plastic over the display is not crystal clear and takes a minute or two to adjust to temperature but apart from that it looks and feels good. I also recommend the moby jug!"

The best baby bath thermometer for crocodile fans

A great option for crocodile-obsessed tots, this cute room and bath thermometer looks so friendly your little one definitely won’t mind seeing it in the bath with them. This clever device re-checks the temperature every ten seconds to ensure the water does not become unsafe, and automatically turns off after thirty minutes to save battery. With a red and green indicator telling you at a glance whether the water is too hot or too cold, this easy to use croc is a must-have.

Review: "Just what we needed to put our minds at rest in the early days."

Another said: "Stopped working after a couple of months - by that time we were accustomed to the feel of the right bath temperature for our baby but would expect a bath thermometer to last much longer than this."

The best multipurpose bath thermometer over £10

Available in two lovely shades of pale pink and pale blue, this floating flower allows you to check your baby’s bath water at a glance. It’s safe and fun for babies of all ages to play with, and the digital display is easy to use. We love a 2-in-1 gadget and this thermometer ticks all the boxes, with the ability to be wiped down and used as a room thermometer as well.

Batteries included

Review: "Fabulous product. Great for checking what temperature a room or bath water is at. Comes ready to go and feels durable. It has a clever design too, standing with a slight tilt for easy reading."


Having worked across a variety of magazines, on topics from food to travel to horses, Stephanie now works as a Digital Writer for Mother&Baby online. 

She loves taking her lurcher puppy Moss for long walks in the country, and spending time with her niece and two nephews. In her spare time she writes fiction books and enjoys baking (her signature bake is lemon drizzle cake).

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