Suffolk County Police Marine Bureau officers rescued an 11-year-old Ronkonkoma boy and his father Sunday evening, after both were dragged out by a riptide off Cupsogue Beach in Westhampton Beach.

Police said the boy, Justyn Espineira, was swimming at Cupsogue Beach at about 6 p.m., but was unable to swim back to shore because of a strong riptide.

The boy’s father, Rick Espineira, 52, paddled out to his son on a body board, and grabbed onto the boy before the rip tide continued to pull them out farther toward Moriches Inlet. The two were about a quarter- to a half-mile away from shore and drifting to the southwest, police said.

In a phone interview, Wendy Espineira, Justyn’s mom, said she watched frantically from the shore as her husband and son drifted farther away.

The boy is autistic, she said, but generally is a “strong swimmer” with a love for the water.

“Thank God there were still people left on the beach, and they called the police for help,” Wendy Espineira said. “They were out there for about a half-hour, but it felt much longer.”

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Rick Espineira said his first instinct was to use the body board to get to his son.

“The board saved both of us,” the elder Espineira said. “I didn’t panic. . . . As soon as I caught him, I realized he would be safe with me, but I also realized I couldn’t get back. I just kept thinking, ‘I hope they’re calling 911.’ ”

Helicopters from the Suffolk County Police Aviation Section located the Espineiras and kept them in sight before Marine Bureau Officers Robert Femia and Neil Stringer arrived in a rescue boat and pulled them out of the water at 6:17 p.m., police said

“I was so relieved, to me it felt like I had been out there forever,” Rick Espineira said.

Both were transported to the East Moriches Coast Guard Station, where they were examined, and found to have no injuries.