Question: Who are these pictures for? I ask because this is the Professional Gallery, and presumably the pictures posted here are for clients. Not saying that anyone can't post here, just the norm seems to be that the pictures posted on this forum are for customers.
That being said, if I were critiquing these as if they are for a client, I would assume someone commissioned you to take pictures of a particular beach, or perhaps they are documentary style for a magazine/newspaper, or even stock photography?
If either of those is true, these are good pics. The horizons are a bit off in some, but for the most part they seem to be good beach shots... fixing the horizons should be easy enough.
Be wary of your horizon line though. For more artistic/interesting shots, try lining the horizon at the rule of thirds line.