Question:
Is it allowed to go to the sauna or steam bath during the 9 days if it is something I usually do 3 times per week?
Answer:
Hello,
A wet sauna or steam bath would be considered like bathing, which Ashkenazim and some Sefardim do not do during the nine days. A dry sauna however would be permitted,
Best wishes
Sources:
“אשרי האיש או”ח ח”ג פרק ס”ט אות מ”ה “סאונה רטובה דינה כרחיצה האסורה, אך סאונה יבשה מותרת”.