Playa Arenilla, Colombia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Playa Arenilla, Magdalena, Colombia, is known for Tayrona National Natural Park. The best time to travel to Playa Arenilla, Colombia, is from December to March, 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!