Abstract: A bathtub cushion assembly with gel inserts selectively warms and cools a user's body and provides support to the user's body during a bath. The assembly includes a cushion having a head portion, a leg portion, and a middle portion extending between the head portion and the leg portion. The cushion has a top side positioned opposite a bottom side wherein the top side and the bottom side define an interior space configured to receive water and ice. A cavity extends downwardly into the top side of the cushion and through the interior space. A plurality of gel inserts is positioned in the cavity wherein the gel inserts are configured to provide comfort to a back of the user and maintain a temperature of the water and ice stored in the interior space.