The Nantucket Dreamland has a live web cam located on the balcony of their Harborview Room.
Unitarian Church Cam
Located high on the tower of the Unitarian Church on Orange Street, this cam gives a bird's eye view of town and harbor. This cam is not available for Internet Explorer.
Great Point Cam
Courtesy of the Trustees of Reservations and Boston University. This cam is located out at Great Point and is often affected by weather, but worth the wait!