The Sonoma Coast AVA is the 750 square mile area with the Pacific ocean on its western boundary, the San Pablo Bay to the south and Mendocino County to the north, headed inland to the other designated AVAs in Sonoma County. The region is heavily influenced by the cooler ocean climate, increased rainfall and fog that lingers long on the coastal mountains. The specific climate suits the demanding Burgundian varietals of Chardonnay and Pinot Noir very well.