South Bay is a fairly shallow body of water at the southern end of Lake Memphremagog, a large lake spanning the border between Vermont and Quebec. The 470-acre South Bay is fully on the Vermont side of the border, near the city of Newport in Orleans County.

The wetlands south of South Bay are in the South Bay Wildlife Management Area.

South Bay (470 acres) is a site for the Vermont LoonWatch annual survey. Birders are encouraged to volunteer as often and whenever they are able. See Join LoonWatch for details.