The harbormaster has an office on the south side of Harbor Island. The harbormaster controls all moorings and can be contacted on VHF-FM channel 16; call sign WZX-8038. There are numerous boatyards and marinas in Mamaroneck Harbor.
Click the “Map View” button above to see a chart of this harbor.
Mamaroneck Harbor, an open bight between Hen Island and Delancey Point, is exposed to southerly winds, but affords shelter against northerly weather. Depths in the outer harbor range from 7 to 12 feet. Important dangers are buoyed; these include Outer Steamboat Rock, near the dredged channel entrance, and Ship Rock, about 0.5 mile southeastward of Outer Steamboat Rock.
About 1 mile northwest of Outer Steamboat Rock is the incinerator tower, a red brick building with a large glass tower, which is a prominent landmark.
A Federal project provides for a 10-foot channel entering the harbor and leading about 0.5 mile west-northwestward to the intersection with two dredged branch channels leading to basins northward and westward of the junction. The channel leading northward to the east basin has a project depth of 10 feet, thence 6 feet in the main anchorage area; to the west of the junction, the channel and anchorage area have a project depth of 6 feet. The entrance channel and the branch channel to the northern basin are marked by lighted and unlighted buoys. The basins are usually filled with moorings of local craft.
A pipeline covered about 6 feet crosses the western branch channel about 50 yards above the junction. Mariners are advised to exercise caution and reduce speed while transiting this area.
The town of Mamaroneck extends from both sides of the harbor. A speed limit of 5 mph is enforced in the harbor.