Setting Up a Safe, Restful Nursery: Layout, Temperature and Lighting for Better Sleep

A nursery gets a lot of attention when it comes to decor and furniture, but the details that actually affect how well — and how safely — a baby sleeps are less glamorous: room temperature, what they’re wearing, and a layout that keeps the cot itself simple and clear.

Getting the temperature right

The Lullaby Trust recommends keeping a baby’s room within a 16–20°C range so they don’t get too hot — a wider band than many parents expect. It’s worth having a proper room thermometer rather than guessing, since a room can feel comfortable to an adult while still being warmer or cooler than ideal for a baby.

If you’re not sure whether your baby is too warm, the Lullaby Trust suggests checking their chest or the back of their neck rather than their hands or feet, which are normally cooler than the rest of the body and aren’t a reliable indicator on their own.

Dressing for the room, not just the season

How a baby is dressed should follow the room temperature rather than a fixed rule. In a cooler room, the Lullaby Trust advises against adding a blanket on top of a sleeping bag — instead, add an extra layer of clothing underneath, or choose a higher tog-rated sleeping bag. In the recommended 16–20°C range, a baby grow with a sleep bag, or a firmly tucked lightweight blanket, is generally appropriate. In warmer weather, above 20°C, a single lightweight layer such as a short-sleeve bodysuit — or even just a nappy — is enough.

One detail worth knowing: doubling up on layers can trap warm air between them and leave a baby hotter than intended, so it’s generally better to choose one appropriately warm, tog-rated layer than to stack several thinner ones.

Seasonal adjustments

For warmer months when keeping the room within the 16–20°C range is difficult, the Lullaby Trust recommends lighter bedding and clothing, and opening the bedroom door and a window if it’s safe to do so. A fan can help too, though it should never be aimed directly at the baby. For winter, the advice is reassuringly simple: it’s rarely necessary to keep the heating on all night, and adding an extra layer will usually do the job instead. Indoor hats aren’t recommended, since babies release a significant amount of body heat through their head.

Layout: keeping the cot itself simple

Beyond temperature, the physical layout of the nursery matters for both safety and restfulness. A few general principles worth following:

• Keep the cot itself clear — a firm, flat mattress with a fitted sheet is the standard recommendation; loose bedding, cot bumpers, pillows and soft toys are generally best kept out of the cot, particularly for younger babies.
• Position the cot away from radiators, direct sunlight through windows, and draughts, all of which can create temperature swings that a room thermometer placed elsewhere in the room won’t pick up.
• Keep cords and cables — including monitor cables, blind cords and any electrical leads — well away from the cot, positioned so they can’t be reached even as a baby grows and becomes more mobile.
• Use blackout curtains or blinds thoughtfully to support daytime naps and reduce early-morning waking, while making sure any cords are fitted with a safety cleat well out of reach.

Lighting for a restful environment

A simple, dimmable light source for night-time feeds and nappy changes tends to work better than a bright overhead light, which can make it harder to settle a baby back to sleep. Many parents find a low-wattage lamp with a warm tone, positioned away from the cot, strikes the right balance between practicality and keeping the room calm during night-time wake-ups.

Noise and a calm sound environment

Sound is worth thinking about alongside temperature and light. Some families find a consistent, gentle background sound — sometimes marketed as “white noise” — helps mask sudden household noises that might otherwise wake a settled baby, such as a door closing elsewhere in the house or noise from the street. If you do use this kind of product, positioning it well away from the cot and keeping the volume low is sensible, similar in principle to the general precaution of keeping any powered device and its cables at a safe distance from where a baby sleeps.

Choosing furniture that suits the room, not just the cot

Beyond the cot itself, a simple, sturdy chair for night feeds, positioned somewhere comfortable and away from draughts, makes a genuine practical difference to how manageable those night-time wake-ups feel. Storage that keeps nappies, wipes and a change of clothes within easy reach, without needing to leave the room in the dark, is a small detail that adds up over the many times you’ll use it in the first year. As with the rest of the room, simplicity tends to serve a young family better than an elaborate set-up that looks good but isn’t actually practical at three in the morning.

Bringing it together

A genuinely restful nursery isn’t about an elaborate colour scheme or expensive furniture — it’s a room kept within a comfortable temperature range, with clothing and bedding matched sensibly to that temperature, a simple and clutter-free cot, and lighting, sound and furniture suited to calm night-time routines.

Sources

• The Lullaby Trust — Room Temperature
• The Lullaby Trust — How to Dress Your Baby for Sleep