What is the warmest body of water on Earth?

The hottest ocean area is in the Persian Gulf, where water temperatures at the surface exceed 90 degrees Fahrenheit in the summer. Another hot area exists in the Red Sea, where a temperature of 132.8 degrees Fahrenheit has been recorded at a depth of about 6,500 feet. In the open ocean, maximum temperatures occur north of the equator. The zone of maximum water temperatures shifts with the seasons, but in only a few areas does it extend south of the equator.