According to the MTA there will be Roosevelt Island F Train service to and from Manhattan this weekend. But, the MTA adds:

F Service is rerouted in Manhattan and Brooklyn… Weekend, 10:30 PM Fri to 5 AM Mon, Oct 13 – 16

… F service operates between Jamaica-179 St and Lexington Av-63 St, and via the Q to/from Atlantic Av-Barclays Ctr (skipping DeKalb Av, days and evenings), and via the D to/from Stillwell Av.

Trains run express in Manhattan all weekend….

Also, no late night Roosevelt Island F Train service from Manhattan 11:45 PM to 5 AM Monday thru Friday October 16- 20.