Jaco, Costa Rica offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Jaco is known for its vibrant nightlife, beautiful beaches, and proximity to Carara National Park. The best time to travel to Jaco, 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!