When can my baby drink water?
Until your baby is around 6 months old they will get adequate hydration they need from breast milk or formula, even in hot weather. Giving a baby younger than 6 months old too much water can interfere with his body’s ability to absorb the nutrients in breast milk or formula. It can also cause his tummy to feel full, which curbs his desire to feed. While small sips of water probably won’t hurt your baby, its best to check with his doctor beforehand during those first 6 months.
Once your baby is 6 months old, its ok to give him sips of water when he’s thirsty especially when he starts solids.