According to the MTA, the E train replaces the F train for Roosevelt Island subway service to and
from Manhattan this weekend and upcoming weekends thru March 22:

TUNNEL REHABILITATION Fri 9:45 PM to Mon 5 AM* until Mar 22 

F Trains are replaced by the E between 21 St-Queensbridge and Delancey
St-Essex St 

F trains run via the E between Roosevelt Av and Canal St and via the A
to/from Jay St-MetroTech…

⚠️

Beginning on Monday, Feb 22, the overnight subway closure
will be shortened to 2 a.m. – 4 a.m. nightly. This allows us to enhance
service for customers as the city cautiously reopens while still maintaining
our concerted effort to deep clean and disinfect the system.

— MTA. Wear a Mask. Stop the Spread. (@MTA)
February 15, 2021

The Roosevelt Island Operating Corp (RIOC) adds:

While we continue to follow social distancing and align our operations with
New York Forward guidance, we also continue to incrementally increase the
number of passengers permitted on the Tram. Tram capacity will increase on
Sunday, November 1st, from 20 to 35 passengers per cabin, and we will
continue to assess and gradually increase in phases. 

We understand the need for this mode of transportation, however, the health
and safety of our riders and operators are our priority. We appreciate your
cooperation.

Here’s the
NYC Ferry Roosevelt Island Astoria Route Schedule
which extends to East 90th street on the Upper East Side.

And Roosevelt Island
Citbike docking stations. 

Electric bikes at Roosevelt Island Tram @CitiBikeNYC station https://t.co/sP5XYgbxSH https://t.co/2qWcszGgTH

— Roosevelt Islander (@Rooseveltisland) January 28, 2021