He then established himself as one of the top young surfers on the world pro-juniors tour before a serious knee injury kept him out of the water for nearly all of 2010.
But it happened during a training ride in small waves off Mount Maunganui beach, rather than being pounded by some of the monster waves he has conquered in the past.
Hewitt has a mantra from Muhammad Ali that kept him going through those long months of rehab: "Champions aren't made in gyms. Champions are made from something they have deep inside them - a desire, a dream, a vision. They have to have the skill and the will. But the will must be stronger than the skill."
It must have worked as he recovered to become the first Kiwi to win twice on the ASP Pro Junior tour in 2011 - a feat Maz Quin managed just once.
But there is more to Hewitt than focusing on his own goals.
He is an ambassador with Deuce Generation footwear and the Young Hearts Project, with partners Youth Line and Great Potentials, that provide inspiration, hope and financial help to young New Zealanders.
So far $100,000 has been raised through the sale of Deuce Generation shoes.
Hewitt gave an inspiring speech to a packed assembly at Manurewa Intermediate recently and has spoken to Tauranga school groups.
"I enjoy giving back to the community and to younger kids, just trying to help them through the tough times. I talk about my journey and what it has taken. It makes a difference."
Not bad for a kid from Tauranga Boys' College, who grew up wanting to be an All Black and did not start surfing seriously until he was 15.