My hair sticks to a fairly strict regimen in the summer -- freshly washed, one day straight, second day curl, third day loose curl, 4th day beachy wave, and depending on how much activity it's seen, I might even leave it on the fifth day. I'm gross.
My tips to preserve curls and get away with not washing my hair?
#1 - Invest in a great dry shampoo -- these work differently for everyone, but a few favourites include Klorane, Batiste, Rene Furterer and good old baby powder. Not sure how to use dry shampoo? Check out my handy-dandy video.
#2 - Body shower -- My biggest issue is that no shower cap in the world will contain my hair, so I've started using my bamboo head wrap to help my hair avoid getting wet. It also helps to have a shower head that detaches, instead of the fixed ones that force you to contort in all sorts of positions to avoid the spray.
#3 - Texture will help hide any dirty hair, so embrace that tousled, beachy, bedhead. My hair is super straight, so that usually translates to dreadlocks, but if I take a few minutes to put a little wavey dent in my hair, it goes a long way. Take ten minutes to wrap your hair around a 1 inch curling iron or to get some waves with a GHD -- the messier, the better. Don't stress if the waves loosen on day three/four, it'll add to the 'I woke up like dis' effect.
#4 - When in doubt, put on a hat. Or if you're feeling super 90s, a bandana.