Lagia, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Lagia, Peloponnese, Greece, is known for its traditional stone architecture and proximity to the historic Mani Peninsula. The best time to travel to Lagia, Greece, is from May to September, with average air temperatures ranging from 75°F to 85°F and water temperatures from 72°F to 79°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!