I like the minimalist composition. The combination of the monochromatic-blue color palette and the contrast between the texture of the beach and the smooth motion of the water is really nice. You caught the wave at just the right spot, and with just the right amount of smoothness/texture.
The curved horizon does bug me, though; if you corrected that I think it would make the composition stronger. I also might burn-down the top-central part of the sky, to match the light falloff in the corners.