Baby bath

I read quite a lot of times on glow how mummy's bath there babies every night before bed time. My health visitor has told me a baby until the age of one years old doesn't need a bath every day as it would dry there skin out. Two to three times a week is more then enough. I bath my baby 2-3 times a week as my two older children have eczema. Now it's summer in U.K. someday London becomes really warm. I was wondering how are the babies that have a bath every night do there skin dry out.