Plymouth Bay

Plymouth Bay is also in the southern waters of the Gulf of Maine in the northern Atlantic Ocean.

To the north, Saquish Neck serves as another barrier beach protecting the bay and is almost seven miles in length.

Plymouth Beach and Saquish Neck together form a mile wide opening, connecting the bay to the open sea, with boating channels deep enough to sustain moderate boating traffic.

Several peninsulas define the shoreline of Plymouth Bay such as Rocky Nook, a densely populated coastal area of Kingston, and Powder Point of Duxbury.

The mud flats of Kingston Bay are used for shellfishing and clamming and have flourished due to Plymouth Bay's ability to isolate itself from red tide, which occasionally impacts the Massachusetts coastline.