Route 213 is a state highway in southeastern Connecticut, running in a fishhook pattern from central Waterford to downtown New London via the shoreline.

It heads south toward Long Island Sound, soon crossing over the Amtrak railroad tracks, then turning east at Goshen Cove after another two miles (3 km).

It soon passes by the entrance to Harkness Memorial State Park then cuts northeast across the shore along Niles Hill Road, crossing Alewife Cove into the city of New London.

In New London, it turns north following Ocean Avenue through the southwestern part of the city to end at an intersection with US 1 in the downtown area.

In 1974, Colman Street became one-way southbound and the northbound route was shifted several blocks east to Jefferson Avenue.