"It's been an up and down season - I've been fighting so many injuries since I got back from surf worlds and it's been frustrating, so I was pretty surprised to come away with the 100m win."
He'll miss the New Zealand surf lifesaving championships which start in Gisborne today having become just the sixth man to win the beach flags/sprint double last year at Ohope.
Surf lifesaving helped launch his athletics career and he won a beach sprint bronze at last year's world championships in France.
Harman aims to be fit again for the Australian track championships at the end of this month, with the Australian surf lifesaving championships and the world university games also looming.
Friday's 100m win meant he now has a full collection of national junior, youth and senior 100m titles, although the latest would've been a lot sweeter if training partner Joseph Millar had also been able to line up.
Millar has collected an unprecedented triple-double - the 100-200m double at the past three national championships - but a back injury ruined his campaign this year.
"I'm stoked and relieved to have won, although it would've been far better if Joey had been there as well ... it probably would've been a different story too," Harman said.
"I feel for the guys who should've been there so it doesn't quite feel like a proper championship win but I guess it's in the record books."
-The New Zealand surf lifesaving championships start today at Midway Beach in Gisborne and finish on Sunday. Nearly 1500 competitors are expected to attend.