An experienced harbourmaster has issued an urgent plea to take precautions after a teenager almost drowned in Albert Town.
Queenstown-Lakes harbourmaster Marty Black said the girl was part of a group of three or four on the Clutha River using inflatable floats about 6.30pm on Tuesday when she became trapped.
"They got swept into a tree entrapment on the upstream side of the camping ground and unfortunately one was held under for a bit and had a huge fright."
The harbourmaster said people often mistook the Clutha for being benign.
However, strong currents and trees presented danger — although this one would be removed.