A Marine’s body was recovered Saturday after a boat overturned off Marine Corps Base Hawaii at Kaneohe Bay.

Two survivors endured an hourslong ordeal as they swam to shore in rough seas in the dark.

Base spokesman Chuck Little said the Marine was stationed at the base and his identity was being withheld pending notification of next of kin.

He said the base was saddened by the loss and appreciates the assistance of those who searched for the man.

The Marine was with a group of three men on a 17-foot Boston Whaler that overturned about 10 p.m. Friday.

Honolulu Fire Department Capt. David Jenkins said two of the boaters reported the vessel had been hit by a wave off North Beach on the base.

The three men were together in the water, but at some point became separated and only two were able to swim back to shore.

The survivors apparently had been in the water for four hours and called for help at about 2:25 a.m. after reaching land.

Jenkins said he didn’t know how far from shore the men were when the boat overturned. Firefighters responded to North Beach and were joined by the Coast Guard and the base’s Waterfront Operations in search of the Marine.

Firefighters found him in about 30 feet of water, unconscious and without a pulse, at about 8:25 a.m. He was several hundred yards from the boat, Jenkins said.

Firefighters transferred the man to Federal Fire Department paramedics at the Waterfront Operations pier at 8:58 a.m.

The Boston Whaler was still adrift Saturday afternoon; its last known location was near Kailua, the Coast Guard said. The Coast Guard issued a warning to mariners because of the risk of a collision.

The Coast Guard was working with the owner to recover the vessel.

Meanwhile, a high-surf advisory remains in effect until 6 a.m. Monday for the north-facing shores of Oahu, Kauai, Niihau, Molokai and Maui.

Waves of 18 to 24 feet are expected today, with wave heights dropping this evening.

The National Weather Service warned of strong breaking waves and said strong longshore and rip currents will make swimming “difficult and dangerous.”

Surf along west shores will be 12 to 18 feet.

A small craft advisory remains in effect until 6 p.m. today due to seas of 9 to 12 feet.