The L Train will NOT be running on week ends starting Friday night April 17 and continuing for 5 weeks!! There will be NO service between Lorimer and Manhattan. The G train will still be operational.  Also Ferry service runs from Manhattan to the North 6th st  water front and from there you can take the Bedford L Train to Graham.  So very sorry for the inconvenience. Also Uber is offering $5 rides. See info here

Here are more alternatives: