Baby Room Temperature: 5 Ways to Get It Right
Most UK parents stress about the nursery temperature at some point, usually around 2am when the heating has clicked off and you are wondering whether your baby needs another blanket. The official guidance is reassuringly simple, and once you have a reliable way to check the room, the rest falls into place. The Lullaby Trust advises keeping the room where your baby sleeps between 16 and 20 degrees, with light bedding or a well-fitting sleep bag. A colour-changing nursery thermometer such as the Tommee Tippee GroEgg2 makes that check instant, because you can read the room at a glance during night feeds without switching on a bright light. This guide walks through five practical ways to hold that range through cold snaps, heatwaves and everything in between.
- Aim for 16 to 20 degrees in the room where your baby sleeps, following Lullaby Trust safer-sleep guidance.
- The GroEgg2 gives you a colour cue you can read in the dark, which beats squinting at a tiny display at 3am.
- Measure at cot height and away from radiators, because a thermometer balanced on a warm radiator tells you nothing useful.
- Adjust layers and tog ratings before touching the thermostat, since overdressed babies overheat far faster than chilly ones do.
- Keep bedtime conditions steady every night, with the Zello white noise machine masking the hallway noise that wakes light sleepers.
1. Fix 16 to 20 degrees in your mind
Sixteen to twenty degrees is the range the Lullaby Trust recommends for the room where your baby sleeps, and it applies from the first night home through the first year. You do not need lab-grade precision here, because somewhere in the middle of that band is perfectly fine for most babies. The quick physical check the NHS suggests is feeling your baby's chest or the back of their neck, since hands and feet often feel cool even when your baby is comfortably warm. If their chest feels hot or they look sweaty, remove a layer and check again after a little while. When anything about your baby's health worries you, your health visitor or GP is the right call, not a blog post.
2. Put the thermometer where your baby sleeps
A thermometer on the hallway wall tells you about the hallway, so place yours at cot height and close to where your baby actually sleeps. Keep it away from radiators, sunny windows and draughty doors, because any of those will skew the reading by several degrees. The GroEgg2 earns its place in thousands of UK nurseries by glowing amber when the room drifts warm and blue when it turns cool, which you can read from the doorway. If you prefer numbers, the ThermoPro TP55 shows temperature plus humidity on one clear display, which helps in flats where damp air makes rooms feel colder than they are. Households with naps at grandparents benefit from the DOQAUS 3-pack, since you can leave one sensor in each sleep space for the price of a takeaway.
3. Change what your baby wears, not the thermostat
Overheating is the bigger risk, so reach for lighter layers before you reach for the heating controls. Most manufacturer tog guides pair 16 to 20 degrees with a 2.5 tog sleep bag over a vest or light sleepsuit, which suits a typical British home outside heatwaves. Skip hats, hoods and loose blankets indoors, because babies shed heat through their heads and covered heads trap warmth fast. If the room sits above 20 degrees, drop to a 1.0 tog bag or just a vest, then recheck how your baby feels after settling. Your health visitor can confirm the right setup for premature or low-birthweight babies, who sometimes need tailored advice.
4. Have a plan for heatwaves and cold snaps
Summer nights above 24 degrees challenge every parent, so close the nursery curtains during the day and open windows on both sides of the house to pull cooler air through. A fan helps circulate air on still evenings, provided it points away from the cot rather than blowing directly onto your baby. Offer extra milk feeds in hot weather, since hydration matters more when babies sweat through their sleep. Winter brings the opposite trap, so keep heating low and steady instead of blasting it before bed, and never put hot water bottles or electric blankets inside the cot. Keep the cot itself away from radiators and cold outside walls, because both create hot or chilly spots that the middle of the room never shows.
5. Keep every night consistent
Babies settle faster when the room feels the same each evening, so run the same order of bath, bag, book and bed at roughly the same time. Darkness plus a steady background sound signals sleep far better than total silence broken by slamming doors. The Zello white noise machine plays continuously through the night, which masks traffic, televisions and older siblings practising the recorder. Keep the thermometer visible during your routine for a week, because you will soon learn exactly which settings hold your nursery inside the ideal band.
Products mentioned in this guide
- Tommee Tippee GroEgg2 - colour-changing nursery thermometer you can read from the doorway during night feeds.
- ThermoPro TP55 - digital display showing temperature and humidity together, useful in flats where damp air skews comfort.
- DOQAUS Room Thermometer 3-Pack - three sensors for bedroom, living room and the grandparents' house in one box.
- Zello Original White Noise Machine - continuous background sound that masks household noise through naps and nights.
Room temperature questions, answered
What is the ideal room temperature for a baby?
The Lullaby Trust recommends 16 to 20 degrees for the room where your baby sleeps, with light bedding or a well-fitting sleep bag. Most UK homes sit naturally inside this band for much of the year. A nursery thermometer takes the guesswork out of checking.
How can I tell if my baby is too hot?
Feel their chest or the back of their neck, as the NHS advises, since hands and feet often feel cool regardless. Hot, sweaty or clammy skin means you should remove a layer and check again shortly. Speak to your health visitor or GP promptly when your baby seems unwell alongside the warmth.
Do I need a special nursery thermometer?
Any accurate room thermometer does the job, so a simple digital display is enough when money is tight. Nursery models like the GroEgg2 earn their keep by showing the temperature as a colour you can read without turning lights on. Multi-packs suit families whose babies nap in more than one house.
What should my baby wear at 16 to 20 degrees?
Most tog guides suggest a 2.5 tog sleep bag over a vest or light sleepsuit for this range. Skip hats and loose blankets indoors, because covered heads trap heat quickly. Adjust up or down when the thermometer shows the room sitting outside the band.
What if the nursery goes above 20 degrees in summer?
Shade the room by day, ventilate in the evening and dress your baby in fewer layers, offering extra milk feeds for hydration. A fan pointed away from the cot keeps air moving without chilling your baby directly. Contact your GP or health visitor when heat seems to be affecting your baby's health.
Our verdict
Hold the nursery between 16 and 20 degrees, check it with a thermometer you can actually read at night, and change layers before touching the heating. The GroEgg2 plus a ThermoPro TP55 on the nursery wall covers most families for less than a weekly shop, and the routine becomes second nature within days. If this is the piece of baby prep you sort this week, your 2am self will thank you.
Emma reviews baby gear for My Baby Now - prams, car seats, monitors, toys and everything in between. Parent of two, she has first-hand experience of what actually matters when you are navigating sleep deprivation and a screaming baby in a car park.
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Last reviewed: 4 September 2026 ยท Evidence-based content ยท Contains affiliate links