When Can Babies Drink Water? A Parent's Guide

As a parent, you’re always keeping an eye on what goes into your baby’s body—and water seems like the most natural choice, right? But when it comes to babies, hydration isn’t as simple as handing over a sippy cup. In fact, giving water too early can do more harm than good.

This blog breaks down when babies can start drinking water, how much they need, and how to tell if your little one is getting enough fluids throughout the day.

0–6 Months: No Water Needed Just Yet

Most medical experts agree that babies under six months should not be given water.
Their systems are not ready for it, and even small amounts can put them at risk of an electrolyte imbalance, which can be life-threatening.

Water can also fill up their tummies, reducing their intake of breastmilk or formula, which are essential for growth. Breast milk or formula provides all the hydration and nutrients they need. 

So if your baby is under 6 months old, you can skip the water entirely—they’re getting everything they need from milk.

6–12 Months: Small Sips with Solids

Once your baby hits the 6-month milestone and starts eating solids, it’s safe to begin offering small amounts of water. Think of it as a gentle introduction—not a replacement for breast milk or formula, which should still be their main source of nutrition and hydration.

Water isn't a necessity yet but can be offered in small amounts during meals to help babies practice drinking from an open or straw cup. This is a great time to practice safe swallowing and build oral-motor skills. 

Breastmilk is about 87% water, providing most of the hydration babies under one need, making water optional for breastfed babies. It is good to practise though!

12 Months and Up: Water Becomes a Daily Essential

By the time your baby turns one, their hydration needs begin to shift as toddlers begin eating more solids and drinking less milk, their need for water increases.

While breastmilk can still contribute to hydration, water now becomes the main source. 

Every child's needs will vary depending on the weather, activity levels, and overall diet, but by this stage, most toddlers can regulate their thirst and drink when needed. 

How Do I Know if My Baby Is Drinking Enough?

Worried your baby might not be getting enough fluids? Here are a few simple signs to look for:

• Plenty of wet diapers (generally, 4-6 wet diapers in 24 hours is a good sign for babies under 1 year old!)

• Moist lips and mouth (not dry or cracked)

• Tears when crying (lack of tears can indicate dehydration)

• Normal energy levels (lethargy or irritability can be a red flag)

As they grow, trust their ability to listen to their thirst cues and offer water regularly throughout the day. 

Tips for Offering Water to Your Baby

• Use a soft-spout sippy cup or an open cup for practice.

• Avoid juice or flavored waters—plain water is perfect.

• Offer water with meals or snacks, but don’t force it.

• Let them see you drinking water—they love to copy!
  
  

Conclusion: Keep It Simple, Trust Their Cues

Introducing water is a gentle, gradual process. Start slow at six months, and let your baby lead the way. As long as they’re having regular wet diapers, feeding well, and seem content, chances are they’re getting the hydration they need.

Water is a wonderful addition to your baby’s routine—but like everything in early parenting, timing is everything. Stay tuned into their cues, and when in doubt, ask your healthcare provider for guidance.