The roughest surf on the Bahía de Navidad [1] shoreline is closer to Barra, the most tranquil closest to Melaque. Swimming is consequently best and safest toward the Melaque end, while, in contrast, the most popular local surfing spot is where the waves rise and roll in beside the Barra jetty. Bodysurfing and boogie boarding are best somewhere in between. At least one shop in Barra, Farmacia Zurich (on Legazpi, south corner of Jalisco, tel. 315/355-6135), sells boogie boards, surfboards, fishing poles, tackle and lures.
Links:
[1] http://www.moon.com/destinations/puerto-vallarta/the-jalisco-coast/barra-de-navidad-and-melaque