I finally got around to checking out the public access at the end of Knowlesway Extension in Narragansett. This is a nice option for those looking to paddle the lower end of Point Judith Pond around Great Island and Galilee. The State Boat Launch in Galilee limits parking to vehicles with trailers. Marina Park in the Upper Pond is great, but it is a long way from Galilee if you are just looking for a short paddle.
Knowlesway Extension Waterfront Public Access Point, is located at 220 Knowlesway Ext, Narragansett, RI 02882 on Google Maps. Coming down Point Judith Road (Route 108) you take a right at the Cumberland Farms across from St. Mary Star of the Sea Church. There is no public lot, but street parking seems to be permitted. There is a picnic table, and stairs leading down to the water.
I found reference to this as a public access point in the Coastal Public Access Inventory for the Narragansett Conservation Commission, on the Coastal Resources Management Council website, and in Google Maps.