According to the MTA:
F Coney Island-bound trains run via the E from Roosevelt Av to 5 Av/53 StThere will be no Roosevelt Island F Train Service to Manhattan
Weekends, 11:15 PM Fri to 5 AM Mon, until Oct 7
Trains resume regular service at 47-50 Sts.
No Coney Island-bound F service at 21 St-Queensbridge, Roosevelt Island, Lexington Av/63 St and 57 St.
next weekend as well.