Lady Siam is located at 882 Massachusetts Ave, Arlington, MA. This location is in the Arlington Heights neighborhood. This business specializes in Restaurants. Lady Siam is open Mon, 11:05am-9:59pm; Tue, 11:05am-9:59pm; Wed, 11:05am-9:59pm; Thu, 11:05am-9:59pm; Fri, 11:05am-9:59pm; Sat, 11:05am-9:59pm; Sun, 12am-9:59pm and accepts Cash, Discover, Mastercard and Visa.