Mr Pinfold was one of four children and attended King's College in Auckland and Otago University where he studied commerce. He was the treasurer of the university's commerce students' society OCOM.
He is survived by his parents Graeme and Mary and brothers Nicholas, Oliver and Daniel.
A death notice published by the family said he was the loved boyfriend of Lara Wilcox.
"Alexander died tragically as a result of an accident and has been taken from us far too soon," the notice read.
"He lived life to the fullest and crammed each day with fun, laughter and enjoyment which touched us all.
"Alexander, we all have our very special and valued memories of you and while you are gone from this life, you will live with us forever in our hearts."
Mr Pinfold was described as a loved and treasured son, cherished brother, dearly loved grandson, spirited nephew and special cousin.
His funeral will be held at St Patrick's Cathedral in central Auckland at 1pm tomorrow.
"In lieu of flowers Alexander would have loved you to support Surf Lifesaving NZ," his family requested.
It is unclear whether Mr Pinfold was wearing a helmet but it is legal to ride a skateboard on the road without a helmet.
In the three years from 2011 to 2013 there were 24,684 ACC claims in relation to accidents involving skateboards.
ACC said that fewer than three people had died in skateboard-related accidents.
Additional reporting: Nicholas Jones
Skateboarding ACC claims
2011: 8452
2012: 8369
2013: 7863
Fatals: Fewer than 3, 2011-13
