Not sure which direction to go
These include a thermal layer underneath your mini that's either invisible (a vest) or visible (a long-sleeved polo neck that makes a nice contrast to your dress), as well as opaque tights, knee-high boots or shearling-lined ballet pumps and, last but not least, a winter coat to envelop your body in warmth but also provide a soaring juxtaposition with your frock's high-and-mighty hemline
Also, dont forget to explore plus size summer wedding guest dresses, styles that flatter petites, and flowing silhouettes made to move with the ocean air
Agree that Gorgonzola could be good
For guests who want a refined look, a Blue Wedding Guest Dress in a fitted column, A line shape, or flowing skirt gives enough presence without looking bridal