Playa Union, Argentina offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Playa Union is known for its dolphin watching tours featuring the unique Commerson's dolphins. The best time to travel to Playa Union, Argentina, is during the summer months of December to February, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!