Butler took the tumble while filming a story for ESPN.
The point guard prepared for the ride by putting on two life jackets and said he couldn't swim. He also asked ESPN's Sam Alipour if there were sharks in Lake Independence in Minnesota, known as the Land of 10,000 Lakes.
At one point, Alipour steps out of the canoe, leaving Butler by himself in the backseat. The canoe starts tilting to the left, with Butler stuck inside. He screams loudly and waves his arms before falling in and getting soaked.
Luckily it looked to be about six inches of water.
This is comedy at its finest. 😂😂😂😂😂😂😂😂😂 https://t.co/tYrijp4nEG— Karl-Anthony Towns (@KarlTowns) November 8, 2017
"Noooooo @jimmybutler you wasn't readyyyy," Timberwolves star Karl-Anthony Towns tweeted.
"It's safe to say that @JimmyButler has fully embraced the Minnesota lifestyle," the Timberwolves tweeted.
Butler, 28, was born in Houston, Texas, and went to Tomball High School in Tomball, Texas, before playing at Marquette. The three-time All-Star spent the first six years of his career with the Chicago Bulls before being traded to Milwaukee on June 22.
The Timberwolves lost 125-101 on Wednesday to the Golden State Warriors.
Butler is averaging 14.7 points, 5 rebounds and 4.1 assists per game in his first season for Minnesota.
"My plan is to win. That's all I ever want to do," Butler told the Pioneer Press Monday. "I don't care if I'm scoring, passing, if I'm just a defender, if I don't shoot any shots or whether I shoot 100 ... As long as we win, I'm cool, I'm happy."
Minnesota faces the Phoenix Suns at 8 p.m. Saturday at Talking Stick Resort Arena.