Puerto Piramides is the only settlement inside the protected Peninsula Valdes, and a practical base for locally operated scuba, guided sea-lion snorkeling, seasonal boat trips and extraordinary land-based wildlife viewing. The village lists shallow introductory dives, rocky reefs and excursions for certified divers; the protected peninsula adds southern right whales, elephant seals, penguins and occasional orcas. Whale-watching boats operate seasonally, but swimming or scuba diving with whales is prohibited under Chubut rules. September to November offers a particularly rich combination of wildlife, while the warmer-weather December to April period better suits beach time and most casual water activities. Plan around wind, tides, gravel roads and reserve access rules. Puerto Madryn is a separate mainland-side service and dive base, not an interchangeable launch point for this guide. Municipal dive information; park visitor information; whale-watching regulations.