Public Baths and Swimming Pools
A Muslim woman should not use public baths (hammam) or swimming pools because these places are likely to be a cause of her exposing herself to evil influences. The following tradition treats this point:
"Some women from Homs or from Sham (now the area of Damascus) came to 'A'ishah. She asked, 'Do you enter the public baths? I heard the Messenger of Allah saying that a woman who undresses anywhere else other than in her own house tears off the satr which lies between her and her Lord .' " (At-Tirmidhi and Abu Dawud)
If the public baths and swimming pools are mixed, with both men and women using them, it is all the more objectionable. At one stage the Prophet (peace be upon him) forbade both men and women to enter public oath- houses but later he allowed men to use them on the condition that they were never naked. "The Messenger of Allah, may Allah bless him and grant him peace, forbade all men to enter public baths but later allowed them to enter them wearing waist-wrappers."
If a wealthy man builds a private pool on his own property there is no harm in him and his wife using it together. However, if he has more than one wife, he should not bathe with more than one at a time, and, if he has grown-up sons, they should not bathe together with their mothers or step-mothers.