The town of Wareham sits at the head of Buzzards Bay, with more than 54 miles of shoreline along coastal waterways like the Weweantic River, the Wareham River, and Onset Bay.

The town covers 37 square miles, and all of that area is located within the Buzzards Bay watershed. Wareham is surrounded by the towns of Marion, Rochester, Middleborough, Carver, Plymouth, and Bourne.