Summer Wedding Dress Outfits . From winter weddings to beach weddings, check out our wedding outfit ideas for men and women. The only issue is that wedding dress codes can vary wildly depending on the venue, so you need options. 21 Formal Summer Dresses For Wedding Guests - crazyforus (Nicholas Lane) Attending a summer wedding looking stylish and without melting into a puddle before the speeches commence is something akin to an art. The weather is perfect, you don't have to worry about a jacket ruining your look, and July sunsets go hand-in-hand with Portrait mode. A navy blue suit is a great alternative to black for summer weddings with a more formal dress code. Finding pretty wedding guest dresses that are comfortable and ready to sit outdoor ceremonies can sometimes be a difficult task. Attending a summer wedding looking stylish and without melting into a puddle before the speeches commence is something akin to an art.