There is no marker of the site. The site is currently located under the elementary school here.

Approximate location of the Wessagusset Colony in Massachusetts

Wessagusset Colony (sometimes called the Weston Colony or Weymouth Colony) was a short-lived English trading colony in New England located in present-day Weymouth, Massachusetts. It was settled in August 1622 by between fifty and sixty colonists who were ill-prepared for colonial life. After settling without adequate provisions and harming relations with local Native Americans, the colony was dissolved in late March 1623 with surviving colonists joining Plymouth Colony or returning to England. It was the second settlement in Massachusetts, predating the Massachusetts Bay Colony by six years.

• http://en.wikipedia.org/wiki/Wessagusset Colony
• Philbrick, N., 2006, Mayflower: Penguin Books, New York, 463p.