When and how much can babies drink water?
Knowing when and how much water to give your baby can be confusing. This article clarifies when babies can drink water, the appropriate amounts at different ages, and how to introduce water safely. We'll discuss why babies shouldn't have water too early, the risks of water intoxication, and provide guidance on appropriate drinks for babies from newborn to toddler stages. Understanding when babies drink water is important for their nutrition for babies, water consumption, and overall health. By understanding these guidelines, parents can confidently provide their babies with the right amount of hydration at each stage of development, supporting healthy growth and preventing potential health issues like electrolyte imbalance risk.
When Can Babies Drink Water?
It's a common question among new parents: when is it safe to give babies water? The answer depends on their age and stage of development. While hydration is crucial, offering water too early can be detrimental to their health.
Babies Shouldn’t Drink Water Too Early
Babies Shouldn’t Drink Water too early, as their bodies are not yet equipped to handle it properly. Their primary source of hydration and nutrition should come from breast milk or formula.
Newborn to 6 Months: No Water Needed
Newborn to 6-month-old infants do not need water. Breast milk or formula provides all the hydration they require. Offering water at this stage can interfere with their ability to absorb essential nutrients and can lead to health problems.
Why is water not suitable for babies younger than 6 months?
Giving water to babies younger than 6 months poses several risks.
Water fills up little tummies
A baby's stomach is small. Water fills up little tummies, displacing the space needed for nutrient-rich breast milk or formula. This can lead to inadequate calorie and nutrient intake, impacting their growth and development. This is especially important for formula fed babies.
Risk of water intoxication
Water intoxication symptoms occur when babies consume too much water, diluting the sodium levels in their bodies. This electrolyte imbalance infants can cause serious health issues, including seizures and brain damage. The kidney function infants isn't mature enough to process large amounts of water efficiently.

How Much Water Can Babies Have?
The amount of water babies can have varies with age. It's important to introduce water gradually and in appropriate quantities.
6 to 8 Months: Introducing Small Sips of Water
At 6 to 8 months, as babies start solid foods and milk for your baby, you can introduce small sips of water. This is the age appropriate hydration stage. Offering water during weaning can help them get used to drinking from a cup or beakers. A few sips (1-2 ounces) of water after feeding is sufficient.
8 to 12 Months: Slowly Increasing Water Intake
Between 8 to 12 months, you can slowly increase water intake. As they consume more solid foods, they may need a bit more water to stay hydrated. Offer a few ounces of water throughout the day, especially after meals.
12 Months and Beyond: Water Becomes a Main Drink
From 12 months onward, water becomes a main drink alongside milk and solid foods. Babies can have 4-8 ounces of water per day, depending on their activity level and the climate. Having water available throughout the day is helpful.
How to Introduce Water Safely
Introducing water safely involves offering it in small amounts and observing your baby's cues. Use a small cup or sippy cup (drinks and cups for babies and young children) to help them learn to drink. Always supervise your baby when they are drinking water.
Drinks for Babies and Young Children
It's important to know what drinks are suitable for babies and young children at each stage. Here's a breakdown:
Breast milk
Breast milk is the ideal source of nutrition and hydration for babies, especially in the first six months.
Formula milk
Formula milk is a suitable alternative to breast milk, providing essential nutrients for growth and development.
Non-cows' milk formula
Non-cows' milk formula is an option for babies with allergies or intolerances to cow's milk.
'Goodnight' milk
'Goodnight' milk is a type of formula marketed to help babies sleep better, but it's not generally recommended without consulting a pediatrician.
Water
Water is safe for babies over six months in small amounts.
Cows' milk
Cows' milk is generally introduced around 12 months of age.
Unpasteurized milk
Unpasteurized milk should be avoided due to the risk of harmful bacteria.
Goats' and sheep's milk
Goats' and sheep's milk can be alternatives to cow's milk but should be introduced with caution and after consulting a pediatrician.
Fruit juice and smoothies
Fruit juice and smoothies should be limited due to their high sugar content.
Squashes, flavored milk, 'fruit' or 'juice' drinks and fizzy drinks
Squashes, flavored milk, 'fruit' or 'juice' drinks and fizzy drinks are not recommended for babies due to added sugars and artificial ingredients.
'Baby' and herbal drinks
'Baby' and herbal drinks should be used with caution, as some may contain ingredients that are not safe for babies.
Hot drinks
Hot drinks are not suitable for babies due to the risk of burns.
Drinks for babies 0 to 12 months
Here's a more detailed guide on what drinks are appropriate for babies in their first year.
0 to 6 months
Breast milk or formula should be the only source of hydration for babies aged 0 to 6 months, as recommended by the World Health Organization (WHO).
Do not give your 0 to 6 month old baby:
- Water
- Fruit juice
- Tea
- Coffee
- Other beverages
6 to 12 months
After six months, babies can start having small amounts of other drinks in addition to breast milk or formula.
Milk
Continue to offer breast milk or formula as the primary source of nutrition.
Cooled boiled water
Cooled boiled water can be offered in small sips, especially during hot weather or when introducing solid foods.
Drinks to avoid from 6 to 12 months
Certain drinks should be avoided due to their potential harm to babies.
Fruit juices
Fruit juices are high in sugar and can contribute to tooth decay and other health problems.
Fizzy drinks
Fizzy drinks contain no nutritional value and can cause digestive issues.
Tea and coffee
Tea and coffee contain caffeine, which is not suitable for babies.
Plant-based drinks
Plant-based drinks, such as soya drinks or rice drinks, may not provide the necessary nutrients for babies.
Follow-on formulas
Follow-on formulas are not necessary if your baby is eating a balanced diet.
From 12 months
From 12 months, babies can start having cow's milk and a wider variety of drinks in moderation.
Tips to Get Baby to Drink Water
- Offer water in a colorful cup or sippy cup (beakers).
- Make it a routine to offer water after meals.
- Lead by example and drink water yourself.
- Try different temperatures of water to see what your baby prefers.
Understanding Baby Hydration by Climate and Conditions
A baby's hydration needs can vary depending on the climate and other conditions.
What should my baby drink in hot weather?
In hot weather, babies may need extra fluids to stay hydrated. Offer breast milk or formula more frequently. For babies over six months, offer small amounts of cooled boiled water throughout the day.

What should my baby drink if they have a fever?
If your baby has a fever, ensure they are getting enough fluids to prevent dehydration. Continue to offer breast milk or formula, and for babies over six months, offer small sips of water frequently. Contact HSE Live or your Maternal Child Health Nurse if you are concerned.
Can my baby drink other drinks?
As discussed above, some drinks are more suitable than others. Focus on breast milk, formula, and water. Limit fruit juice and avoid sugary drinks.
Signs of Dehydration in Babies
It's important to recognize the signs of dehydration in babies. These include:
- Fewer wet diapers than usual
- Dry mouth and tongue
- Sunken eyes
- Lethargy or irritability
- Lack of tears when crying
If you notice these signs, consult your pediatrician immediately.
Conclusion
In conclusion, understanding when babies drink water is critical for their health and development. Starting with no water for newborns to 6-month-old infants, then introducing small sips of water from 6 months onward, ensures that babies receive the appropriate hydration without compromising their nutritional needs. For more helpful parenting insights, you can explore muminity as a trusted resource. Remember to offer water safely, be aware of dehydration signs infants, and consult your pediatrician with any concerns. By following these guidelines, you can support your baby's healthy growth and well-being.
Frequently Asked Questions
Here are some frequently asked questions about water for babies.
How should water be offered to babies?
Water should be offered in a small cup or sippy cup. Supervise your baby and encourage them to take small sips.
How much water should babies have?
Babies aged 6-12 months can have a few ounces of water per day. Babies over 12 months can have 4-8 ounces per day.
Is it okay to give water if my baby is constipated?
Yes, offering water can help relieve constipation. Ensure you are also providing fiber-rich foods if your baby is eating solids. Studies from NCBI Databases show that Water for constipation is beneficial.
Is it okay to dilute formula if my baby is constipated?
No, diluting formula is not recommended as it can disrupt the nutrient balance. Always prepare formula according to the manufacturer's instructions.
What kind of water can babies drink?
Babies can drink cooled boiled tap water or bottled water that is low in sodium.
What type of water can my baby drink when traveling?
When traveling, use bottled water or boil tap water to ensure it is safe for your baby.
Can babies drink sparkling water?
No, sparkling water is not recommended for babies as it can cause gas and discomfort.
Is my baby getting enough water?
If your baby is producing enough wet diapers and seems content, they are likely getting enough water.
What are signs my baby swallowed too much water?
Signs of overhydration include vomiting, irritability, and in rare cases, seizures. Contact your doctor if you suspect your baby has swallowed too much water.
After 12 months of age, should I have water available throughout the day?
Yes, after 12 months, it's a good idea to have water available throughout the day to encourage healthy hydration habits.