"Just getting to the trampers was extremely challenging. The conditions were atrocious as they tramped up the mountain through the night," he said.
"The efforts they then made to bring them back from hypothermia were outstanding."
Mr Arnold-Kelly said he wanted the public to realise that the search and rescue team were volunteers who gave up their own time to carry out the rescue.
"[They] were prepared to put themselves in a difficult and uncomfortable position for the sake of complete strangers who had made poor decisions.
"We are very lucky to have skilled professionals in our community who are prepared to go to such lengths for other people."
Police interviewed the trampers once they had been transported off the mountain by helicopter and found they did not have adequate equipment, clothing or experience for the tramp they had embarked upon.
Police said anyone who is going into the outdoors should seek advice from the Department of Conservation about their intended route and the conditions they might face.