Gramvousa, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Gramvousa, Crete, Greece, is known for the historic Gramvousa Fortress and the stunning Balos Lagoon. The best time to travel to Gramvousa, Greece, is from late May to early October, with average air temperatures around 75-85°F (24-29°C) and water temperatures around 72-79°F (22-26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!