Sincapa, Nicaragua offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sincapa, Rivas, Nicaragua, is known for its proximity to the stunning beaches of San Juan del Sur and the iconic Ometepe Island. The best time to travel to Sincapa, Nicaragua, is from December to April, with average air temperatures around 85°F (29°C) and water temperatures near 82°F (28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!