The bushwalkers, part of the Seventh Day Adventist Pathfinder Club, became stranded on the eastern side of Fisher River after heavy rain caused the river's water level to rise.

Tasmanian Seventh Day Adventist communications director Wayne Boehm said the club, which comprises young people from across the state, was on its yearly bushwalking expedition.

The group spent the long weekend camping near Lake McKenzie. "We were caught out by the elements, there were no kids lost, we were just stuck on one side of the river," Mr Boehm said.

"All the kids arrived home safely ... there was one child that was suspected to have hypothermia, but he checked out all OK. "They were all back at school today," he said.