The feline floater, her fur matted and caked with seaweed, was discovered Sunday night by security guards on the remote island's north shore, a spokeswoman said.
"The assumption is that she came over by water," said Elizabeth Rapuano, the park's director of marketing and communications. "She was wet. Her fur was salty."
Workers suspect drenching rains in New Jersey, part of a ferocious weekend storm that hit the Southeast and killed at least 45 people, may have swept up the cuddly calico, causing her to dog-paddle across New York Harbor.
She said the cat appears to be in good shape after the swim, but workers will take her to a vet to be sure.
And the hopes of staff at the 172-acre island - which opens to the public next month - to find her owner don't appear to be washed up.
Source: New York Daily News