According to the MTA:
F Coney Island-bound trains run via the E from Roosevelt Av to 5 Av/53 StAnother reason to stop by and get your No F Train Subway Service door magnets
Weekend, 11:15 PM Fri to 5 AM Mon, Feb 28 - Mar 3
Trains resume regular service at 47-50 Sts.
from the Roosevelt Island Historical Society Visitors Center Kiosk.