Pure water will boil at 212 degrees Fahrenheit (100 degrees Celsius) at sea level. On the summit of Mount Everest, where the air pressure is lower, the boiling point of pure water is around 154 degrees Fahrenheit (68 degrees Celsius). In the depths of the ocean, where the pressure is extremely high, water can be found to be liquid even when the temperature is as high as 750 degrees Fahrenheit (400 degrees Celsius).