Lightweight striped sweaters are a solid go-to for warm weather. They feel nautical, summery, and are ideal when you want to layer up but still look season appropriate. I have a bunch of them (nine at last count), but for some reason I didn't wear them as much this summer as I thought I would. Woven shirts ended up being my go-to, so my sweaters were left out in the cold, so to speak.
The good thing is that sweaters layer easily, so they're perfect for transitional seasons as well. I love this sweater in particular because of the details - the boatneck and the notch on the sleeve make this one of my more unique striped pullovers.
You can't beat a great pair of khaki sneakers in summertime. Less overt than white sneakers, but still just as versatile.
Boatneck pullover sweater by Gant. Red khakis by Gap. Khaki sneakers by Generic Surplus. Striped belt by J. Crew. Watch by Burberry. Beaded bracelet by Didier Guillemain. Sunglasses by Gucci.