Pocasset is located in the southwestern part of the town of Bourne. It is bordered to the north by the communities of Bourne and Monument Beach, to the east by the Massachusetts Route 28 highway, to the south by Red Brook Pond and Red Brook Harbor, and to the west by the northern end of Buzzards Bay. Buzzards Bay and its surrounding watershed are ecological treasures providing natural resources vital to the people and wildlife that live within. The region's unique characteristics make this a special place for all to enjoy. Buzzards Bay is an estuary (a place where salt and fresh water mix) nestled in Southeastern Massachusetts. Among east coast estuaries it is one of the most pristine bays, with clear, cool water, vibrant marine life, and coastal communities with a rich maritime history and a deep connection to the Bay.