I think the composition is good...but I'm not digging the B&W conversion at all. There's black and there's white, and not a whole lot in between. It's as if most of the tonal range has been lost, because to me at least, the clouds appear to have the same value as the palm trees. It's also difficult to make out the outline of the lighthouse against the sky.
In addition, I think a tighter crop would make for a more impressive image. Perhaps trimming some off the top and on the bottom, just short of the base of the nearest tree.