Isole Tremiti, Italy offers 1 beach perfect for sunbathing, surfing, swimming, and more. Isole Tremiti is known for its stunning marine reserve, the Abbey of Santa Maria a Mare, and the crystal-clear waters surrounding the archipelago. The best time to visit Isole Tremiti, Italy, is from June to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!