To make things simple, we've created a handy Baby Sleep Outfit Temperature Guide (see above) to help you choose the right sleepwear for every summer night.

During a UK heatwave, outdoor temperatures often grab the headlines. But what really matters for sleep is the temperature in your baby's room.

Experts generally recommend aiming for a nursery temperature of around 16-20°C where possible. If your baby's room is warmer than this, you'll want to reduce layers and switch to lighter sleepwear.

A simple room thermometer can take the guesswork out of bedtime.

What should my baby wear to sleep?

Under 16°C

For cooler nights:

• 2.5 tog sleeping bag
• Short sleeve  bodysuit or vest
• Long sleeve sleepsuit

If the room drops below 14°C, consider switching to a warmer 3.5 tog sleeping bag.

16-20°C

This is considered the ideal sleeping temperature for babies.

Dress your baby in:

• 2.5 tog sleeping bag
• Short sleeve  bodysuit or vest
• Long sleeve sleepsuit

This combination provides warmth without overheating.

20-21°C

As temperatures climb:

• 1.0 tog sleeping bag
• Short sleeve bodysuit or vest
• Long sleeve sleepsuit

The lower tog helps maintain a comfortable temperature overnight.

22-23°C

For warmer summer nights:

• 1.0 tog sleeping bag
• Short sleeve bodysuit

At this temperature, many babies no longer need a sleepsuit underneath.

24°C and above

When the heatwave really hits:

• 0.5 tog sleeping bag
• Short sleeve bodysuit or vest

Or, if the room is particularly warm:

• Nappy only

Keeping clothing minimal helps reduce the risk of overheating.

How can I tell if my baby is too hot?

A common mistake is checking hands and feet.

Babies often have cool hands and feet even when they're perfectly comfortable.

Instead, gently feel:

• The back of their neck
• Their chest
• Their tummy

If their skin feels hot, sweaty or clammy, remove a layer. If they feel comfortable and dry, they're likely dressed appropriately.

Best fabrics for baby sleep in hot weather

When temperatures rise, breathable fabrics make a big difference.

Look for:

• Organic cotton
• Lightweight cotton jersey
• Natural fibres that allow air to circulate

Heavy synthetic fabrics can trap heat and moisture, making sleep less comfortable.

At Sproot Baby, our sleepsuits, bodysuits and vests are designed for everyday wear, frequent washing and comfortable sleep, helping parents build a practical wardrobe that works across changing temperatures.

Building a heatwave-ready baby wardrobe

The easiest way to handle changing temperatures is to have a small collection of versatile essentials:

• Short sleeve bodysuits
• Lightweight vests
• Zip-up footless sleepsuits
• Different tog sleeping bags

Rather than buying lots of specialist items, a simple capsule wardrobe gives you everything you need to adapt as temperatures change.

That's exactly why Sproot was created - a smarter system for baby clothing that works harder, lasts longer and makes everyday parenting a little easier.

Shop summer sleep essentials

Whether you're preparing for a UK heatwave or simply looking ahead to warmer nights, breathable baby basics are the foundation of comfortable sleep.

Explore Sproot Baby's collection of organic cotton bodysuits, sleepsuits and everyday essentials designed to keep little ones comfortable day and night