Beach weddings can be lovely...or... My BF had a beach wedding that we really enjoyed. Laid back, casual, perfect for them. It was held at a hotel in Hawaii and the staff did a great job of keeping the area clear of others so their pictures were lovely.
Now for the "or" experience... another friend had her wedding in Mexico on a beach. The hotel didn't keep other guests clear and she has lovely photos of the typical "hairy guy in a speedo that ought not be wearing a speedo" in many of her pictures. That was the least of her worries though...she wore a "floaty" type of gown that a gust of wind grabbed and let's just say all the guests saw how lovely her garter and undergarments were in the middle of the ceremony. We laugh about it now...particularly since she and the groom divorced after 9 months. We all say it must of been the curse of the speedo!
Whatever you do, enjoy the day with your groom, family and friends.