The Intrepid is located on the Hudson River at 46th Street. When the river rose during the storm, four to six feet of water swamped the museum's main electrical transformers and backup generators.
"The flooding we experienced during the height of Sandy was beyond anyone's imagination," said Susan Marenoff-Zausner, museum president, in a statement.
The space shuttle Enterprise, which has been housed at the Intrepid since June, was unharmed by the storm but the pavilion in which it is housed deflated. The shuttle exhibit will remain closed while repairs are made, but the shuttle is visible meanwhile from the Intrepid's flight deck and pier. The museum's welcome center, including ticket counters and gift shop, was also badly damaged and will not immediately reopen.
The Intrepid museum complex includes the 900-foot-long Intrepid aircraft carrier, which was commissioned in 1943 and served during World War II, the Vietnam War and the Cold War. Also onsite, in addition to the Enterprise, are the guided missile submarine Growler and 27 aircraft including the British Airways Concorde.
Only a few major attractions in New York City are still closed due to damage from Sandy, including the Statue of Liberty, Ellis Island and the New York Aquarium in Coney Island, Brooklyn.
The Intrepid is offering a "buy one, get one free" ticket promotion through Feb. 15 using coupons available from the museum's Facebook page and Twitter feed.