El Tamarindo, El Salvador offers 4 beaches perfect for sunbathing, surfing, swimming, and more. El Tamarindo, La Union, El Salvador, is known for its beautiful beaches and the nearby Gulf of Fonseca. The best time to travel to El Tamarindo, El Salvador, is from November 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!