Understanding Halacha, Minhag, & Mesorah
Rabbi Moshe Taub
August, 2025
Sometimes the rare issue arises that demands a response; a matter about which I have a responsibility to share, no matter how unworthy I am as an agent; especially when it’s a matter transpiring surreptitiously, out of sight to most. To be clear, while often writing about matters of halacha, I rarely, if ever, focus on controversial topics, unique pesakim, or contentious issues.
Yet something has been brewing for the past ten years that, in past summers, I dismissed as a matter that would soon disappear and not metastasize.
I was wrong, as this matter has only gotten worse.
I will seek now to tackle this issue. I do so with humility, and only lkavod Torah u’lahadira,
Saliently, some readers may not believe this is really an issue, or will be dismissive of it ever reaching their own community. However, I am testifying from the front lines, that while this may not yet affect your community, it is coming for it…unless we publicize it and nip it in the bud now.
- Post Nine Days Swim
As a child, it felt as if summer only truly begins after Tisha B’av. This is when many yeshivos begin their break, and it is when camps finally re-open their swimming pools.
The reasoning behind our abstaining from swimming during the Nine Days is not due to our general avoidance from dangerous activities.
While kayaking, swimming in an unobserved ocean/lake or a wave pool etc. would often fall all under this ‘danger’ concern, simply swimming in a confined and safe pool – especially with lifeguards – would not.
Rather, our abstention from swimming is derived from our avoidance of rechitza, bathing, during this time. Specifically, pleasurable bathing, whether to relax, luxuriate, or to cool off.
Therefore, bathing for certain mitzvah needs is allowed.
Those who swim to relieve arthritis or to aid in their health is also often sanctioned (Nishmas Avraham, 551; cf. Halichos Shlomo, 14:61 regarding stam swimming as exercise where he rules to be strict).
Rav Avraham Dovid Horwitz (d. 2004) writes how in his youth he once saw the Brisker Rav walking toward the saunas of Switzerland on erev Tisha B’av to bathe in its hot bath. The Brisker Rav explained how this was for his health, and these visit cost him well beyond the worth of a simple hot bath, indicating its value is not one of ‘pleasure’ (shu”t Kinyan Torah, 2:100, pg. 238).
Beyond its interest, I open with this review to demonstrate that halacha allows for appropriate heterim when it comes to ‘swimming halachos’.
Swimming on Shabbos, however, is a whole different kettle of fish.
- The Shabbos Issue
Several years ago, we were away for Shabbos and was walking with my wife in the hot, long summer afternoon when we saw frum families carrying bags. We paid no heed, until we realized that they were carrying swimming bags! Later in the day, we saw them returning, laughing and joking with moist towels around their neck.
We were stunned and were told that certain rabbis in their area allowed backyard swimming on Shabbos.
I requested the name of the rav and was informed that it was a private psak. Yet, a private psak being used by many…in public!
When I was a rav in Pesach hotels I noted, albeit rarely, some going to the pool on Shabbos/yom tov. I have it on good authority that this issue had only increased over time, with even some ‘right-leaning’ families enjoying this ‘heter’.
This became clear just this year when I was invited to speak at a girls high school to give a brief a shiur on the general halachos of Shabbos. During the presentation, I parenthetically cited the basic issur derabanan of swimming on Shabbos (Shulchan Aruch, siman 339:2).
This caused a gasp and for almost all the hands to shoot up. Some shared that this couldn’t possibly be right since some in their neighborhood(s) swim in their pools on Shabbos!
One girl even ran out to call her father and confirm that he had indeed asked a rabbi, and not just for a choleh (this rabbi he called was, coincidently, was from that same area we visited above).
(The reader should note that even in a rare case where some poskim allow non-life-threatening cholim to dip in a pool if needed, they demand it be done in secret, and then overtly state that it’s still forbidden for them to actually swim and delight in the pool! See, e.g. Rav Shternbuch in shu”t Teshuvos Vhanhagos, 1:222).
- The Halacha
I do not wish to belabor the point and overwhelm the reader with mareh mekomos. As we will seek to show, this issue goes beyond sources.
So that the reader has some clarity, however, a quick primer:
Chazal issued an injunction against swimming on Shabbos. However, this gezeira does not apply equally to all bodies of water (shabbos 41; see Shulchan Aruch, ibid.). Indeed, there is a strong argument to be made that certain types of home swimming pools would NOT fall under this decree.
Yet this fact is utterly irrelevant to the final analysis, as there’s a separate, distinct, and clear minhag yisroel, dating back centuries, not to even immerse our body on Shabbos, even in cold water (see, e.g. Mishneh Berrura, 326:24; shu”t Igros Moshe, evh”e 2:13).
In fact, there are even opinions that women should avoid, on Shabbos, even immersing to become tahor (sh’lo b’zamah)!
(See Terumas Hadeshen, d. 1460; see Mishneh Berrura ibid.)!
While we are don’t rule like this latter, stricter view today, it is a stark reminder as to the seriousness of this minhag… that now some wish to dismiss for simple pleasure and to avoid boredom.
There’s even an ongoing debate among poskim if men may immerse in a pool to accomplish the important chumrah of tevilas Ezra. The Chazon Ish being against even such immersion!
While most allow such holy immersions, this is only due to testimony regarding great and holy rebbes as well as litvehsa gedolim, such as the Chofetz Chaim. Who is the gadol today with similarly broad shoulders on which to break down the barrier of stam swimming on Shabbos?!
Rest assured that the Chazon Ish’s longing for tevilas Ezra far eclipsed one’s desire to race laps with his friends, and yet the Chazon Ish at times avoided it due to this minhag.
Minhag yisroel is a matter of law, even in cases when the Shulchan Aruch ruled before its creation or acceptance.
For example, would this same rabbi (if he truly exists) tell aveilim to turn over their beds, etc., as the Shulchan Aruch prescribes, or, would he rather rely on minhag and abstain?
(I will not here humor the ‘sevara‘ that ‘in our day’ our relationship, need, and commonality with and around all matters of bathing is wholly different than in the days of chazal. This is because anyone familiar with the gemaros regarding the many bathhouse gezeiros in the days of chazal -and how the hoi-polloi tried to skirt them each Shabbos -demonstrates that such assertions are without mighty evidence)
All of the above is not even to mention the biblical concerns brought about through sunbathing on Shabbos, sechita re: bathing suits, hair, etc. etc. etc.
Even more, does this rabbi (should he exist) make sure each respondent is aware that in addition to this-now-bypassed minhag, there is an actual halachic decree against swimming on Shabbos in other bodies of water, e.g. lakes, etc.? Rav Moshe Feinstein writes how he feared that if every major metropolis had an eiruv then, chalila, the melacha of carrying could become forgotten, perhaps when on vacation.
The same is certainly true here, as I can testify from that class visit.
When Rosh Hashana falls on Shabbos it is silent from shofar, lest one person, at some point in history, once, mistakenly, may transgress Shabbos. Is one’s desire to swim greater than our need for shofar?
Chalila am I asserting the ability to issue new decrees based on such concerns as they relate to swimming on Shabbos…rather that we lack the power to override existing ones!
One person minimized this minhag to me (another result from this ‘heter’) by asserting that this minhag against immersion in water was ‘only’ due to ‘zilzul Shabbos‘.
“That’s so subjective, and leads to capricious and mercurial rulings!”, he argued.
His is a horrible misunderstanding of the zilzul concept. The Chazon Ish explained that while indeed pragmatic, only the leaders of each generation may choose how to apply zilzul.
More, Rav Moshe Feinstein opines that breeching zilzul Shabbos is a Torah violation (oh”c 4:60)!
[For more on this, see my post: The “Kosher” Shabbos Switch]
Rav Elyashiv once wrote, “B’dor hayasom hazeh, shetika adif/in our orphaned generation, perhaps silence is best” (Kovetz Teshuvos, vol. 1; teshuva to the Kaliver rebbe in response to his request to add an extra ‘Shema‘ at the end of davening, at least in schools, in memory of the six-million. Even to such a holy request, Rav Elyashiv said ‘shev v’al taaseh adif‘).
I do not mean to sound sharp or not understanding. Of course, it’s understandable that long summer Shabbos afternoons can be a challenge.
However, while halachic history may be replete with newer concerns and applications of halacha to modern realities, the method of introducing such novel views is to publish it for the masses to study -as we find in most any field. A psak such as this, meant for the masses yet hidden from colleagues for inspection, is suspect at best, if not initially rejected out-of-hand.
As to these ling Shabbos afternoons, which can become challenging: the rishonim share how this free time is a gift for recapturing the learning missed during the hard workweek. Instead of being mechanech our children to use auxiliary time for the questioning of the sagacious minhagim of klal yisroel, demonstrate how to surrender to them. Their Ipads are finally down. Talk to them. Go on a walk. Do an activity during which you can converse.
Or, pull out a Midresh Says instead.









