Keeping Baby Hydrated in Hot Weather: Summer Tips from The Little Baby Brand

When the temperatures rise, most parents find themselves wondering how to keep their baby comfortable, cool, and above all, well-hydrated. Babies are especially vulnerable to the effects of heat, and ensuring they’re getting enough fluids is key to helping them stay happy and healthy during warmer months.

At The Little Baby Brand, we believe that summer should be a season of sunshine and sweet moments – not stress. So here’s your go-to guide on how to deal with heat with a baby, with a focus on hydration, whether you're breastfeeding, bottle-feeding, or considering giving extra water.

Why Hydration Matters More in Hot Weather

Babies can’t regulate their body temperature as well as adults, which means they’re more likely to lose fluids quickly in the heat. They also can’t tell us when they’re thirsty, so it’s important to proactively monitor and manage their fluid intake.

In hot weather, babies may be more prone to:

• Fussiness or irritability

• Overheating

• Dry skin or lips

• Fewer wet nappies

• Sleep disruption

Staying ahead of dehydration is key, and the approach varies slightly depending on how your baby is fed and their age.

Breastfeeding in Hot Weather

If you're breastfeeding, you may notice that your baby wants to feed more often during warm spells – and that’s completely normal.

Breast milk naturally adjusts to meet your baby’s hydration needs. The first milk (foremilk) is thinner and more watery, which is ideal for keeping your baby hydrated. Frequent feeds ensure your baby gets enough fluids without the need for extra water in most cases.

Top tips for breastfeeding in heat:

• Offer the breast more often, even if feeds are shorter.

• Keep yourself well-hydrated – your fluid needs increase too.

• Feed in cooler rooms or shaded areas outdoors.

• Use breathable, loose clothing for both of you.

Do you need to give water?
For babies under 6 months who are exclusively breastfed, you usually don’t need to offer any extra water – breast milk is enough. If you have concerns, always check with your health visitor or GP.

Bottle Feeding in Hot Weather

If your baby is formula-fed, they may also need extra feeds in warm weather to stay hydrated. Formula-fed babies don't regulate hydration quite as flexibly as breastfed babies, so you may need to offer smaller feeds more frequently.

Extra water?

• For babies under 6 months, if they seem thirsty between feeds, you can offer small amounts of cooled, boiled water in consultation with your healthcare provider.

• For babies over 6 months, it’s safe to offer additional water (also cooled and boiled if under 12 months).

Top tips for bottle feeding in heat:

• Don’t force feeds, but offer more frequently.

• Sterilise bottles and teats as usual.

• Avoid re-using unfinished formula bottles – bacteria grows faster in the heat.

• Offer water in a clean bottle or weaning cup, depending on your baby’s age.

Hydration Tips for Babies Over 6 Months

Once your baby starts solids, they can start drinking a little water regularly – especially when the weather is warm.

How much water can they have?
Small sips throughout the day are fine. Most babies don’t need large quantities – their milk feeds will still provide the majority of their hydration.

Try:

• Offering water in a soft spout or open cup with meals.

• Keeping cups visible and accessible during playtime.

• Making water part of the routine, like after waking from naps or after outdoor time.

Signs Your Baby May Need More Fluids

It's good to be aware of signs that your baby might not be getting enough to drink:

• Fewer than six wet nappies in 24 hours

• Dark yellow urine

• Dry lips or mouth

• Sunken soft spot (fontanelle)

• Unusual drowsiness or irritability

If you’re unsure or concerned, always seek advice from a health visitor, GP, or NHS 111.

Other Ways to Keep Baby Cool and Comfortable

Hydration is only part of the picture – cooling the environment and choosing the right clothing also make a big difference:

• Dress your baby in lightweight, breathable clothes – our collection of 100% cotton rompers, vests and dresses are perfect for warmer days.

• Stay out of direct sun between 11am and 3pm.

• Use a fan to circulate air, but never direct it at your baby.

• Offer a cool bath before bedtime to help bring their temperature down gently.

• Avoid overdressing for sleep – a short-sleeved vest or nappy alone may be enough in very warm weather.

Final Thoughts from The Little Baby Brand

Keeping your baby hydrated in hot weather doesn’t have to be complicated. Whether you’re breastfeeding, bottle-feeding, or introducing solids, the key is to follow your baby’s cues, offer fluids often, and keep their environment cool and calm.