What is the cutoff age that boys can swim with the ladies and girls and vice versa?

 

In regards to swimming in a mixed pool, the following is the position agreed to by Rabbonei Anash (excerpted from here):

Halachically, it is absolutely forbidden to arrange for boys over 9 years old to swim with girls that are age 3 and up.

Even if the boys are under age 9, once they are over 5, they should not swim with girls over 3.

Moreover, it is highly appropriate that even extremely young boys and girls not swim together, therefore, parents are advised to take boys from 3 and older to men only pools.

 

 

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