Fajardo, United States offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Fajardo is known for its stunning bioluminescent bay, Las Cabezas de San Juan Nature Reserve, and the El Conquistador Resort. The best time to travel to Fajardo, United States, is from December to April, with average air temperatures around 75-85°F and water temperatures near 79-82°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!