Hurricane season (June - November) brings the lowest prices. For the best of both worlds -- fewer storms and crowds plus lower prices -- savvy travelers opt for May and October, the shoulder seasons on the island. Consider staying outside of San Juan along the coast, where the rates are generally lower, or head west to Rincon (a surfing hot spot) for cheaper digs. Weekly house rentals near the coast are considerably less expensive than similar properties in the mainland U.S. El Yunque National Forest is the U.S.'s only tropical rain forest and provides miles of fee-free hiking; likewise, most of the island's beaches are free. For a quick meal, head to inexpensive food kiosks and bakeries for authentic island chow.