I don't think I am afraid of water. I love the sea, the beach, and I swim everyday for the past 10 months.
Maybe it's something that happened when I was a child. I remember being on a beach and a big wave came that almost took me into the sea, but my parents pulled me off while I was still in the sand.
Any way, the dreams with the water appeared some 4-5 years ago, and they still pop in my dreams from time to time.
Zélia