Ocean water temperatures as of Wednesday morning July 26, 2023. Scientists are sounding the alarm after water temperatures, similar to those found in hot tubs, were recorded off the tip of Florida. If the temperature recordings are confirmed, it could be the hottest seawater ever measured in the world. A buoy in Manatee Bay, which is about 40 miles south of Miami, hit 101.1 degrees Fahrenheit at a depth of 5 feet Monday evening. For comparison, that's the "ideal" temperature for a hot tub, accor