I have not read any suggested temperature of the water to use for the Sinus Rinse. I prefer warm water as it seems to help dissolve saline solution an Posted on January 1, 2019 by 0 Vote Up Vote Down Ask A Doctor Staff asked 4 years ago I have not read any suggested temperature of the water to use for the Sinus Rinse. I prefer warm water as it seems to help dissolve saline solution and mobilize nasal secretions. Any suggestions? 1 Answers 0 Vote Up Vote Down Ask A Doctor Staff answered 4 years ago We recommend a solution that is either lukewarm or body temperature. Please login or Register to submit your answer Username or Email Address Password Remember Me