According to the MTA Weekender, there will be Roosevelt Island F train service
to and from Manhattan this weekend.
Also, the MTA reports:
F Trains run local in both directions between 21 St-Queensbridge and 71 Av
Weekend, 12:01 AM Sat to 5 AM Mon, Aug 23 - 25
Trains stop at 36 St, Steinway St, 46 St, Northern Blvd, 65 St, Roosevelt, Elmhurst, Grand Avs, Woodhaven Blvd, 63 Dr and 67 Av.