https://community.usms.org/swimming/f/general/11435/humidity-levelsI&#39;ve searched for and read many posts regarding pool temperature and USA swimming&#39;s site even has a short article on relationship between air and water temp, however nothing I&#39;ve come across discusses high humidity levels. The pool I swim in is indoorsen-USTelligent Community 12https://community.usms.org/thread/186964?ContentTypeID=1Fri, 19 Jul 2013 05:15:44 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:a969acaf-896e-468d-be5e-355006c2abaeRedbird AlumPerhaps this post would be helpful... <a href="http://coachsci.sdsu.edu/csa/vol36/rushall1.htm">coachsci.sdsu.edu/.../rushall1.htm</a> (note reference in credits to &quot;swimmming man&quot; paper)<div style="clear:both;"></div>https://community.usms.org/thread/186870?ContentTypeID=1Tue, 16 Jul 2013 13:26:52 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:e500b01e-930e-4265-ae5b-7a575dd15602Former MemberI finally found this in the USA rulebook for competition, its a start 103.7 WATER AND AIR TEMPERATURE .1 /M/ Water temperature between 25 to 28 degrees Celsius (77 to 82.4 degrees Fahrenheit) shall be maintained for competition. .2 Air temperature within 8 feet above deck level in indoor facilities shall be not lower than 76 degrees Fahrenheit, with relative humidity maintained at about 60% and air velocity at about 25 feet per minute.<div style="clear:both;"></div>