This doesn't mean black-tie formal, but the breezy sheath that would have been appropriate for the afternoon setting should be replaced by a longer hemline and, in general, more coverage.
There are enough designs to suit each woman, whether she likes pajamas in a light, breezy material like polyester or satin, or whether she prefers cozy, comfortable fibers like cotton.
Whether you opt for formal dresses to wear to weddings, or you have a selection of breezy dresses for everyday wear, sundresses can play an important role in a summer wardrobe, especially in regions with long, hot summers.
One thing to keep in mind is that the beach is often breezy, so a full skirt may get blown around.Consider too that a summer beach wedding is typically more casual than traditional weddings.
Although you'll enjoy wearing your tankini to the beach or pool, you can also slip a sarong, pareo, shorts or breezy summer skirt over your bottoms to make your outfit store-friendly.