When the temperature rises, it’s natural for new parents to worry: “Is baby too hot? Too cold? What should they wear?” We get it. Dressing a newborn for summer in the UK can be confusing - especially with unpredictable weather.
This guide offers calm, practical advice to help you feel confident dressing your baby during warm spells, heatwaves, and everything in between.
🌡️ General Guidelines for Dressing Newborns in Warm Weather
- Room temperature matters: Ideal room temp for baby sleep is 16–20°C (according to the NHS and The Lullaby Trust).
- Layers are still helpful: Use lightweight layers so you can add/remove based on how warm it gets.
- Check baby's chest or back: Hands and feet can feel cool - this isn’t a reliable way to check temperature.
- Less is more: One layer more than you’re wearing - unless it’s very warm, then the same or even one less.
👶 What Should Baby Wear in the Daytime?
In UK summer temperatures (typically 20–27°C indoors), here's a simple guide:
- 20–22°C: Short-sleeved vest + light sleepsuit or romper
- 23–25°C: Just a short-sleeved vest or muslin top + nappy
- 25°C and above: Light muslin wrap or bamboo swaddle for shade, or simply a nappy in shaded areas indoors
Always keep baby out of direct sunlight. Use breathable layers and stay shaded when outdoors.
🌙 What Should Baby Wear at Night?
Sleepwear depends on how warm the room is - use a thermometer if possible.
- 24–25°C: Short-sleeved vest + very light sleeping bag or no cover
- 26°C+: Just a short-sleeved vest or even just a nappy with a muslin draped nearby for comfort
Use cellular or breathable bamboo blankets if needed - avoid fleece or polyester when it’s hot.
🌿 Fabrics to Look For
When it comes to warm-weather babywear, fabric choice makes a huge difference. Look for:
- Muslin cotton: Ultra-breathable, soft, and cool to the touch
- Bamboo: Naturally temperature-regulating and ideal for hot days
- Light cotton knits: Soft, breathable, and non-synthetic
Avoid heavy knits, synthetic fibres, or anything with poor airflow.
🧺 Realistic UK Tips from Calm Parents
- Keep a soft muslin or bamboo wrap in your pram bag - it doubles as a shade, blanket, burp cloth or light layer
- Change baby’s clothes more often in hot weather to stay dry and comfy
- Keep rooms shaded during the day to avoid overheating at night
- Dress baby for the room they’re in, not the season
Final Thoughts
Summer with a newborn doesn’t need to be stressful. Keep it simple, breathable, and calm. Watch baby’s cues, trust your instincts, and choose fabrics that support gentle regulation. No overbuying. No stress.
This guide is based on NHS and Lullaby Trust guidance, and our own experience supporting new UK parents every day.
