Martha's Vineyard AVA Martha's Vineyard AVA The Martha's Vineyard AVA is an American Viticultural Area located in Dukes County, Massachusetts, including all of the land on the islands named Martha's Vineyard and Chappaquiddick Island. These two islands are located off the southern Massachusetts coast, surrounded by Vineyard Sound, Nantucket Sound, and the Atlantic Ocean. The creation of the AVA in 1985 was controversial. Objections were lodged by the proprietors of a vineyard in California also named Martha's Vineyard, who felt that the creation of an AVA with the same name would dilute their brand value. Federal regulators ruled in favor of the AVA,
Martha's Vineyard cold with a January average of just slightly below . Owing to the influence of the Atlantic Ocean, temperatures below are rare, occurring at least 1 day per year and most days during the winter months rise above freezing. The average annual snowfall is . Summers are warm and mild with temperatures rarely exceeding , with only 1 or 2 days reaching or exceeding it. During the summer months, the island's warmest months (July and August) average around . Spring and fall are transition seasons with spring being cooler than fall. Martha`s Vineyard receives of precipitation per year, which is