Awesome shot! Must have been really lovely to see in real life. It is a little dark though - I hope you don't mind, I took it into Photoshop and added a little contrast, as well as lightening it just slightly using Curves.
The sky is awesome, nice exposure, just right. But I don't like those rocks in the foreground. Best would be, to get closer to the water, so there is no disturbing rock in the foreground. But still, nice picture...