Real Beauty has a nice article on how to make your hair mermaid wavy. The writer, Amber, calls it a "merm" (sounds like perm!) The best part is that it has pictures to help illustrate how-to in five easy steps!
Summer is the perfect time to try this look especially since the humidity makes it hard to keep a blow out from frizzing.
If you recall, I've previously posted on how to achieve fintastic mermaid hair. Check out that post here.