The first time Michael Macchia won the Ocean Mile Swim, in 2015, he was really excited. He was 16, after all, and his victoryfollowed the one his brother, Greg, had accomplished a year earlier. On Aug. 12, after missing last year’s race, Mike regained the title and added another gold medal to the Macchia house.

“This one is still exciting, but maybe not quite as much as it was two years ago,” said the Barnegat Light Beach Patrol lifeguard, who graduated from high school in June and will continue…