According to the MTA Weekender , there will be Roosevelt Island F train service

to and from Manhattan this weekend. That’s 7 weekends in a row. Yay!!!!! Also:

F Trains run local in both directions between 21 St-Queensbridge and 71 Av

Weekend, 12:01 AM Sat to 5 AM Mon, Jul 23 – 25

Trains stop at 36, Steinway, 46 Sts, Northern Blvd, 65 St, Roosevelt, Elmhurst, Grand Avs, Woodhaven Blvd, 63 Dr and 67 Av.

and E Train service for Roosevelt Island too:

E Trains run via the F in both directions between W 4 St and 21 St-Queensbridge

.