In Roman times, the Banquet of the Dead and the holiday of the goddess of purity both happened in May Failing to think about these beforehand could leave you unpleasantly stunned on your marriage day. There's actually nothing that should dissuade you from your vision of a stunning beach rite.
As a matter of fact, there are several benefits. If you have that sort of money to spend, fine, but if not, don't go there. Be practical and remember, the day is what you, your family and your buddies make of it.
They can basically be part of the party. June also signified the end of Lent and the arriving of hotter weather. Summer in total was thought of as a good time to wed because of the sun's organisation with fertility.