Balneario San Cayetano, Argentina offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Balneario San Cayetano is known for its pristine beaches and the San Cayetano Beach Resort. The best time to travel to Balneario San Cayetano, 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 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!