Your beach wedding dress can be a lot more casual than one that may be worn if you were tying the knot in a church or chapel. Simple wedding dresses for the beach do not need to be as heavy or hang past the ankles or come with a very long and ornate train. And, because informal beach wedding dresses use less material and embellishments, even a designer model will not be as costly as one with a long train or using many yards of expensive fabric.