Dreaming of water is the representation new life, and renewed vigor. Water provides for refreshment in long journeys, and cleanse the soul. This is the peaceful aspect of water.
Water can also be a terrible uncontrollable element in dreams. The most fearsome dream or nightmare involving water is drowning, or envisioning dying in the water because humans are not water creatures. There is great discomfort, and disappointment will abound when water rampages through your dream.