Police, fire and marine rescue units were called into to search for the six missing adults at 8:45 p.m.
Police say the tubers started in the area of Milford, New Jersey.
They were found north of there in Frenchtown, N.J. and did not need to be rescued.
New Jersey State Police, and police and rescue teams from both Bucks and Hunterdon counties were involved in the search.
It's not clear yet how the tubers lost contact or details of how they were found.