What to Wear to an Informal Wedding
Short dress (patterns are ok too) or a skirt and a blazer or cardigan, wear heels if the wedding is in the city and try not to wear anything too casual, better look a little bit overdressed than under dresses.
If the wedding is in a garden like setting wear a flower print dress with flats or wedges, if you wear heels they might get stuck in the ground and you will feel really uncomfortable.
For a beach wedding wear a light weight dress and a pair of sandals. Here you can dress pretty casually but still make sure that you respect the event and wear appropriate attire.
Wear cocktail dresses, print dresses, or a skirt and a top, (above the knee lengths are acceptable)