So maybe short-shorts aren't that doesn't mean you have to give in to loose cargos or unseemly cutoffs.
Summer's other option? The trouser short.
From Louis Vuitton:

Knee-length, slim & tailored, they flatter pretty much everyone. I wouldn't style them as above, though. They look best dressed down: a tee, some sneakers, you're set.
Below are two options from local designers. You can also create your own by cropping a pair of suit pants. Just make sure to hem them! Ragged bottoms are awful.

Seersucker from Adam Arnold:

Plaid suiting from A Broken Spoke:
Model: Weston Pratt