Beach Creepy OC

Well, It's a few weeks into summer where I live and i can REALLY feel the heat! Curse my tropical position. What interests me, though is those ghost stories i remember hearing at the beach with my family, and the Animes where they go the beach, eat some watermelons then scare each other... I want to write something that has something to do with summer and/or the sea and stuff. Any suggestions, guys?