If your hair still isn’t playing ball, try adding a headband, scarf or bandana to keep things in place. Think tousled rather than tidy. And, bonus: no hair on your neck = instant cooling factor.

A head of flouncy curls made Billy Willis easy to spot as he was strolling through London on a Saturday in March. Mr. Willis’s hair, along with his layers of loose pleats in cool tones, gave him ...

Some of the best cuts were short and sharply sheared (not unlike notable styles I saw at fashion weeks last fall). For many, keeping hair out of the face and eyes seemed to be a prevailing rule.