The oceans surface water temperature varies with the amount of solar radiation received, which is primarily a function of latitude.
it is because as temperature increases, the particles in the water surface move further apart thus reducing the surface tension
1. Until a meteorologist, or other scientific source can improve this answer, it will have to be from a layman's standpoint. As I understand it, hurricanes develop, and enlarge as a result of...
the seasons
The close the latitude is to 0, the hotter it is.