Its a Bikini World with Debra Walley and Tommy Kirk 1967

worst beach/surf movie ever made. Its really bad. Has a farse boat race between 2 Rayson Craft flatties at Marine Stadium, but a cool scene inside the shop in Gardena including the show room and the rigging shop. Lot of cool boats in the shop. The scene just doesn't last long enough.
Its the only movie I know of that where the boat manufacture is list in the opening credits, with the stars, producer, director etc, "Boats by Rayson Craft".