I had to look up beachy waves. 
I am cursed w/curly & wavy hair. My hair looks like that naturally if I............
After wash & towel blot damp
Part hair in 4 sections
Brush straight & loosely braid (1 plait for each section)
Air dry overnight wrapped in do-rag
Unbraid & finger comb
VOILA!
So now I know what that style is called.
"Never argue with a fool. Onlookers may not be able to tell the difference."
