It is the hot season in Moab now, with highs in the low 100's
You want to get out early or do a hike like this.
This stream is off the river road and you can hike the stream bed 4 miles to the pour off and waterfall.
I wore sandals for the whole trip and the water was pretty warm as the depth was generally only ankle deep. I was glad that I had a belt on my shorts as the force of the waterfall could cause a wardrobe malfunction otherwise
Peter