According to the MTA:

F Coney Island-bound trains run via the E from Roosevelt Av to 5 Av/53 St

Weekend, 11:15 PM Fri to 5 AM Mon, Nov 22 – 25

Trains resume regular service at 47-50 Sts.

No Coney Island-bound service at 21 St-Queensbridge, Roosevelt Island, Lexington Av/63 St and 57 St.

As reported last Friday:

… During NYC Planning Department Western Queens/Roosevelt Island Transportation Study presentation to Community Board 8 (CB8) Roosevelt Island committee last night, a Roosevelt Island resident asked about why the constant Roosevelt Island F Train weekend subway service disruptions.

The NYC Planning Department representative did not have an answer.

CB 8 member Larry Parnes indicated that he thought the Roosevelt Island weekend F Train subway disruptions are caused by work related to the construction of the Second Avenue tunnel and that this work is scheduled to be completed by the end of 2013. Mr. Parnes added that he did not know if there is other work related to subway service maintenance and rehabilitation which might require additional Roosevelt Island weekend subway service disruptions after completion of the Second Avenue tunnel work….

The excellent Transportation blog Second Avenue Sagas has much more Lower level 63rd St. Tunnel Image Jacob Silberberg for The New York Times via 2nd Ave Sagas on the history of the 63rd Street Tunnel

as well as the present status of Second Avenue Subway constuction:

The Second Ave. Subway took another step toward completion today and Upper East Side residents will now get something of a reprieve as the agency announced that all blasting for Phase 1 construction is complete….

NBC New York has this September 2013 report on the Second Avenue Subway Information Center

and the NY Times on the construction

of the Second Avenue Subway project.