I really love this shot! I love the different shades of blue contrasting nicely with the dark tan sand. And the glare off the water really create a wonderful moody picture. The underexposure youi've chosen really works well here and the composition is very good as well. Only thing is I think there is too much sky, but that's just me...giving a high score.
What is on the right side of this picture? I see something gray and a smaller red object. I am not sure this captures the idea of representing a season.