When Can My Baby Drink Water? In general, it’s not a good idea to give your baby water until he’s about 6 months old. Until then, he’ll get all the hydration he needs 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, it’s best to check with his doctor beforehand during those first six months.) Read more