San Juanillo, Costa Rica offers 2 beaches perfect for sunbathing, surfing, swimming, and more. San Juanillo, Guanacaste, Costa Rica, is known for its pristine beaches and the nearby Ostional Wildlife Refuge. The best time to travel to San Juanillo, Costa Rica, 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!
