Take her swimming

Cristina • Cancer survivor (Hodgkin's lymphoma); hobbyist photographer/editor; Archaeology student at Johns Hopkins University; 22.
Just kidding by the title. I love makeup. I love swimming. Going to the beach soon, and don't want to go completely bare faced. I know there might not be a setting spray out there that will 100% get the job done, but is there one any of you recommend to get close? I've tried to do some research, but no one can agree on one that is truly "waterproof." Please help!