The youngster's epic journey started in Tvedestrand at six thirty in the morning on Sunday, and he arrived in Hirtshals, Denmark, three hours and 25 minutes later, a covering a distance of 128 kilometers.
“After an hour, I felt pain in my legs. ‘I'll let go now' I thought several times. But I gritted my teeth and held on,” Henrik Wahlstrøm, the young water-skier told the regional Fædrelandsvennen newspaper.
Wahlstrøm had dreamt of the challenge ever since he heard of a man who had water-skied from Norway to Denmark.
“With two or three breaks, he water skied all the way. Since then, I've dreamt of doing the same thing,” he told Bergens Tidende.
The chairman of the Norwegian water-skiing and wake boarding association, Heidi Marie Brenna, shared the feat on her Facebook page.
“I've never heard of anyone who has water skied from Norway to Denmark before, even though Henrik says there is someone who has,” she told Bergens Tidende. “It's incredibly impressive, especially as he is a thirteen-year-old boy.”
Wahlstrøm's parents were on the boat, his father at the helm and his mother communicating with him using hand signals. They were unsure if their son would make it.
“I'm very impressed and proud. When we reached half way, I felt he would make it, but I was afraid he would fall at the end,” mother Anne Wahlstrøm said.
Wahlstrøm has been an avid water-skier since the age of six, and competes in cross-country skiing and biathlon during the winter months.
He has no plans for any more challenges this summer, other than relaxing at his parents' summerhouse in Tvedestrand, Norway.
“It's an incredible feeling,” he told the local Tvedestrandsposten newspaper.