Although Rochester doesn’t touch Buzzards Bay’s coastline, more than 90% of the town’s land area lies within the Buzzards Bay watershed.

The Mattapoisett River and the Sippican River flow through Rochester, which connect the town to Buzzards Bay. Rochester is 36 square miles in size, surrounded by the communities of Mattapoisett, Marion, Wareham, Middleborough, and Freetown and Lakeville.