It only needs a slight tweak, CS2 was saying 0.8 degrees anti clockwise and it looked fine after a quick crop.
Composition wise it's quite nice, sure it doesn't follow the rule of thirds but cropping it to do so would lose the main points of interest, ie the wave in the bottom left and the sunlight in the top centre. It is a bit flat though but there's plenty of scope for boosting saturation, I've had a wee go but I'm not that sure if I've over done it or not. If you want I can post what I have.