Q. Can one who goes to the mikva daily before davening or at least before Shabbos, do so by going for a swim in a lake next to him during the Nine Days? Is there a concern of Ma’aras Ayin. (people watching may think that one is going for a prohibited swim)?
A. Horav Aharon Miller’s Shlit’a opinion is that it is permitted only if he goes in and out as necessary, but does not stay for a continued swim.
Since he is going in and out immediately without swimming, there is no concern for Ma’aras Ayin.
Rabbi A. Bartfeld as revised by Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu Shlit’a.