What you should do is take a coconut and cut it in half. Next, dress up like Arthur, son of Uther Pendragon, from the castle of Camelot, King of the Britons, defeater of the Saxons, Sovereign of all England. Then pretend you are riding a horse while your trusty servant Patsy bangs the coconut halves together.
Ride the length and breadth of the land around the water well and look for a grail. Once you find the grail your water will return to it's normal temp. I'm positive.