Why do you want to do that? If the warmest side is in the proper range (up to 88-90*) the water in the bowl will eventually get to low 80's too (put it in the middle of enclosure)- but bear in mind the water is always going to feel cool to you, because you're roughly 98.6*.
BTW- I'm putting this thread in the BP Husbandry forum, where it belongs. https://ball-pythons.net/forums/foru...2-BP-Husbandry