James Hayers and Toby Hille decided to try their skills on the Water of Leith for the first time yesterday morning.
The river level was raised by ongoing rain that caused Dunedin Civil Defence Emergency Management to evacuate residents living close to the river on Tuesday night.
Mr Hayers and Mr Hille were among those who took advantage of the situation to attempt some water sports, more commonly in kayaks.
"They firmly recommended that we didn’t go back in, just so we’re not putting anyone else in danger if they have to come rescue us," Mr Hille said.
He felt the experiment had gone well, describing the water as "bumpy, but better than expected".
The pair decided against returning to the river following their talk with police.
Even if people had a feeling of control, a situation could rapidly go wrong, he said.
"It only takes one little knock and then you’re washed away."
Kayaker Jonathan Falconer was also among those who went for a ride on the Leith yesterday.
"I was a little bit intimidated at first but my friends told me it was good to go.
"If you’re an experienced kayaker it’s not too crazy," he said.