Mayor Bloomberg remained on a Bermuda golf course for several hours after he was informed Sunday of the Metro-North derailment, a source told The Post.

The mayor was playing a round with gal pal Diana Taylor and one of his daughters, the source said.

The three of them, accompanied by a club caddie, hit the links early in the morning and finished after noon, “somewhere around lunchtime,” the club source said.

Bermuda is one hour ahead of New York, meaning Bloomberg finished around 11 a.m. The deadly train crash happened at 7:22 a.m.

Bloomberg finally made back to New York after nightfall and visited hospitals caring for the critically wounded.

The soon-to-be former mayor said he didn’t feel the need to immediately get back into town after learning about the crash.

“What can I do? I’m not a professional firefighter or a police officer,” he told reporters after leaving one hospital.

“There’s nothing I can do. What I can do is make sure that the right people from New York City — our police commissioner, our fire commissioner and our emergency management commissioner — are there and that they have all the resources that they want.”

Bloomberg — whose golfing Sunday was first reported by The Wall Street Journal — said he was always in the loop, even on the fairway.

“I was briefed a few minutes,” he said, “probably a half an hour after the train wreck, or the first time that I’d heard about it, and we responded in the ways that I think the city should be proud of our emergency first responders. They did exactly what they are supposed to do.”

Bloomberg has less than a month left in office, which he’s held for three terms. Mayor-elect Bill de Blasio takes over on Jan. 1.

Additional reporting by David K. Li