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



to and from Manhattan this weekend.

But:

… TRACK REPLACEMENT | 9:30 PM Fri, Sep 14 to 5 AM Mon, Sep 17 F Service is rerouted in Manhattan and Brooklyn

… No F service at 57 St, 47-50 Sts, 42 St-Bryant Pk, 23 St, 14 St, W 4 St, B’way-Lafayette St, 2 Av, Delancey St/Essex St, East Broadway, and York St.

F Service runs between Jamaica-179 St and Lexington Av-63 St, and via the Q express to/from Atlantic Av-Barclays Ctr…

Also:

STATION ENHANCEMENTS | Until December 2018 57 St F Station is closed

Both Roosevelt Island Tram Cabins are in operation but the North Cabin is working at half capacity because of a malfunctioning gear box that is waiting for replacement. There is Roosevelt Island ferry service on the Astoria Route. Here’s the new summer schedule for Roosevelt Island ferry service.