What Should a 1 Year Old Wear to Bed at 25°C?

Why a 0.2 TOG bag works at 25°C

At 25°C, the risk is not cold — it's warmth accumulating overnight, particularly in homes without air conditioning. A 0.2 TOG sleeping bag is the lightest mainstream option available from Australian brands, and it's designed precisely for warm summer nights. It provides a contained layer without meaningful insulation, which is exactly what a 1 year old needs at this temperature.

By 12 months, most babies have developed significantly better temperature regulation than they had as newborns or younger infants. They're also considerably more mobile — rolling, shuffling, pulling to stand, and repositioning throughout the night. A fitted 0.2 TOG sleeping bag stays put across all of this movement, which matters more at this age than it did in the first few months.

One practical advantage at this stage: an active 1 year old will kick off a loose sheet or blanket quickly. The sleeping bag eliminates that problem overnight, so you're not checking layers every couple of hours in a warm house.

Signs you've got it right (or wrong)

The touch test applies at any age: check the chest or back of the neck, not the hands or feet. At 25°C, you're looking for warmth without clamminess. If the back of the neck is sweaty or the hairline is damp after a sleep, the room or the layers are too warm. At this temperature, overheating is a more common problem than cold.

If your 1 year old is waking and pulling at the sleeping bag, or you notice red cheeks and flushed skin, overheating is the first thing to investigate. Also check whether the room temperature has climbed overnight — 25°C at bedtime in an un-airconditioned Australian home can reach 28°C or higher by midnight in summer. A room thermometer on the bedside table is the simplest way to track this, and it changes the layering call entirely if the temperature rises significantly.

Layering for 25°C in an Australian home

In concrete terms: a short-sleeve cotton bodysuit under a 0.2 TOG sleeping bag. If your home is particularly well-ventilated or you run a ceiling fan overnight, a nappy alone under the 0.2 TOG bag is a reasonable choice for a 1 year old. Cotton and bamboo fabrics breathe better than synthetics on warm nights — worth checking the label if buying new.

The ergoPouch 0.2 TOG sheeting bag, the Love to Dream Swaddle UP Lite 0.2 TOG, and light muslin sleeping bags from Bonds or Bubba Blue are the common Australian options at this TOG rating. Most Australian baby gear shops stock at least one 0.2 TOG option through summer.

If your home uses reverse-cycle air conditioning set to 22–23°C overnight, the room temperature is controlled and you can move to a 1.0 TOG bag — the calculator above will update the recommendation if you adjust the temperature. For homes without climate control in Queensland, the Northern Territory, or coastal Western Australia, the 0.2 TOG combination is the right starting point for summer and often autumn as well.

When a sleeping bag isn't the right call at 25°C

A 0.2 TOG sleeping bag has minimal insulation — it's more of a contained layer than a warming one. But if your room consistently climbs above 27°C overnight, even this thin bag can contribute to heat retention. At that point, skipping the bag is the appropriate call for a 1 year old. A short-sleeve bodysuit or nappy alone is safe for a toddler in a very warm room — unlike newborns, 1 year olds don't need the same level of environmental temperature consistency.

If you're unsure whether your house stays at 25°C or climbs higher overnight, check the room when you hear your child stir during the night. Most parents find their home's overnight temperature pattern within the first few weeks of summer. Once you know your house peaks at 27°C or above by early morning, drop the bag from the start of the night rather than responding to a wake-up after the fact.

Frequently asked questions