The American flags on Jeffrey Epstein’s private Caribbean island have been lowered to half-staff in the wake of his apparent suicide behind bars, according to a new report.

Boat captain Kelly Quinn, owner of Salty Dog Day Sails, was cruising past Little St. James, just off the southeast coast of St. Thomas in the US Virgin Islands, when she captured photos and videos of the lowering.

“It was a real moment out there and it just felt so heavy,” Quinn told NBC News. “I didn’t feel there was a realness of the end of Jeffrey Epstein until I saw that. That was a lot more literal.”

Though it wasn’t clear who lowered the two flags on each end of the 70-acre property, Quinn said she believes it was one of Epstein’s employees.

“They’re doing this as a remembrance, but the irony is he’ll only be remembered for the deviance,” Quinn said of the convicted pedophile and accused child sex trafficker.

The American flag on the neighboring island of Great St. James, also owned by Epstein, was flying at half-staff as well, the outlet reported.

The wealthy financier purchased Little St. James in 1998 for $7.95 million — and turned it into a sprawling estate, according to reports. The property — which gained the nickname “Pedophile Island” — has sparked the interest of tourists in the wake of Epstein’s death.

It has been regarded by the feds as Epstein’s primary residence in the United States. At least one of Epstein’s alleged victims said in a court affidavit that she participated in an orgy there and had sex with Epstein and others.

In 2016, Epstein bought Great St. James for $22.5 million.

Epstein was found dead of an apparent suicide in his cell at the Metropolitan Correctional Center early Saturday. He was being held there without bail since his July arrest on sex trafficking charges.

Epstein suffered multiple broken neck bones, his autopsy revealed.

With Post wires