Ag Nikolaos, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Ag Nikolaos is known for its picturesque Lake Voulismeni and the nearby Spinalonga Island. The best time to travel to Agios Nikolaos, Greece, is from May to October, with average air temperatures ranging from 70°F to 85°F and water temperatures from 70°F to 77°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!