Navy blazer in a light weight, I agree that something seersucker is always fun, several pairs of different color trousers (have some fun with colors like red, yellow, even pink)...will try and think what else
Summer Checklist: sunscreen cooler A nice beach chair (w/drink holder?) hat (too many different kinds to mention) sunglasses flip flops boogie board moisturizer games for out in the sun (f*%#ing boring just sitting there) clothing magazines (or light summer reading - nothing too deep or you'll forget to flip over, or even worse, miss the girl in bikini) good swimming trunks (patagonia) sneakers, flip flops?/sandals? web belt t-shirts, polos, a light jacket (for those cool nights) Finally, khakis and a decent pair of denim.
I've almost completely stopped wearing shorts this summer and replaced them with linen pants. I love them so far, they actually seem cooler than something like cotton cargo shorts. A nice pair of sunglasses is also a must. I just had perscription lenses put in my favorite sunglasses; I don't know how I lived without them before. I've been wearing long sleeve polos a lot this summer. I really like them for going out in the evening.