The Weweantic River is a river in southeastern Massachusetts.
The river arises in wetlands in Carver, meanders generally south through swampy birch and maple forests in Middleborough and Rochester, and drains into a Buzzards Bay estuary in Wareham near the mouth of the Sippican River. Its watershed covers approximately 18,000 acres (73 km²), with many cranberry bogs in its upper reaches.
Although the river has historically abounded in fish and shellfish, it currently has no significant herring population due to dam obstruction below Horseshoe Pond.
The Weweantic Estuary is a moderately sized
embayment to Buzzards Bay at 588 acres of
water surface and is relatively deep (mean depth
of 5.9 m). Within the tidal reaches of the
Weweantic Estuary, eelgrass beds are not present
much above the mouth of Pattons Cove (Beaver
Creek Marshes) which is south of the confluence
of the Weweantic and Sippican Rivers (and Rt.
6). Salinity within this region averaged 18 ppt
near Pattons Cove, 16 ppt within the Weweantic
tributary, south of Rt. 195. and only 22.6 ppt at
the tip of Cromeset Neck. These low salinities
are linked to the high freshwater discharges of
the rivers. It is likely that poor water quality has
resulted in the loss of eelgrass from this inner
region. The lower portion of the estuary currently
supports less than 5 acres of eelgrass
beds, in part due to the depth of the lower basin.
Wareham boatyard marina is located at Rose Point on the beautiful Weweantic River, in Wareham, Massachusetts.
The Weweantic River is a prime Striped Bass Hangout.
Eel grass, salt marsh.
Brush, coves, ledges, submerged riprap.