According to the MTA:
F Jamaica-bound trains are rerouted via the after 47-50 Sts to Roosevelt Av Late Nights, 11:45 PM to 5 AM, Mon to Fri, Sep 19 – 23
No Jamaica-bound service at 57 St, Lexington Av/63 St, Roosevelt Island and 21 St-Queensbridge.
The Roosevelt Island Operating Corp ( RIOC ) adds:
The MTA has issued a nightly service advisory for the F train, which may affect travel plans. Please plan your travel accordingly and visit mta.info or call 511 for more information. For electronic updates on F Train service, sign up for MTA Alerts at mymtaalerts.com.
No indication that RIOC will extend Roosevelt Island Tram service to 5 AM while the F Train is rerouted. The Tram normally stops operating at 2 AM Sunday – Thursday and 3:30 AM on Fridays and Saturdays.