Megas Gialos Varis, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Megas Gialos Varis is known for its beautiful beaches and proximity to the historic town of Ermoupoli on the island of Syros. The best time to travel to Megas Gialos Varis, Greece, is from late May to early October, with average air temperatures around 75°F (24°C) and water temperatures around 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!