Cuajiniquil, Costa Rica offers 11 beaches perfect for sunbathing, surfing, swimming, and more. Cuajiniquil is known for Santa Rosa National Park and its beautiful beaches. The best time to travel to Cuajiniquil, 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!