Alvear, Argentina offers 1 beach perfect for sunbathing, surfing, swimming, and more. Alvear, Mendoza, Argentina, is known for its wine production and vineyards. The best time to travel to Alvear, Argentina, is from November to March, with average air temperatures around 75°F (24°C) and water temperatures near 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!