https://marketing-692.nyc3.digitaloceanspaces.com/research/marketing-(498).html
This mom's knee-length patterned dress perfectly matched the mood of her kid's outdoor wedding venue.
https://je-sf-tall-marketing-617.b-cdn.net/research/je-tall-sf-marketing-(241).html
For a seaside wedding I would put on something a bit more flowy just like the flowery and ruffly attire above.