After meeting him on Wednesday, I couldn't find him on the beach
You may have answered incorrectly during the dialogue with him in the mall, check out this guide, it details all the routes and what to do on them. https://docs.google.com/document/u/0/d/1LkXWll0_8kVL23hHWWySoRwKL_4dyluPHeLQsnhvwuE/pub?pli=1#h.fkapub2zoqv4