Alghero, Italy offers 55 beaches perfect for sunbathing, surfing, swimming, and more. Alghero is known for its stunning beaches, the historic Alghero Cathedral, and the ancient Neptune's Grotto. The best time to travel to Alghero, Italy, is from May to September, when the average air temperature ranges from 20°C to 30°C (68°F to 86°F) and the water temperature is around 20°C to 25°C (68°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!