If you're lucky enough to be a metropolitan Phoenix resident or visiting the area during tubing season, you can enjoy a wonderful day floating down the Salt River. Come relax in the beautiful Tonto National Forest surrounded by scenic desert, cacti, and mountains. Tubing Season Tubing season is usually from mid-May until mid-September, 7 days a week, weather permitting. However, the river water can be surprisingly cold and feels best when the mercury hits 100 degrees or more.