Queenstown's harbourmaster is calling for caution as swimmers and boaties flock to the district's waterways to cope with the sweltering heat.
Lake Hayes, Queenstown Photo: 123RF
Queenstown Lakes District is popular with tourists and recreational water users.
Marty Black said boats on the district's lakes must travel below five knots if they are closer than 200 metres to the shore or within 50 metres of another vessel or swimmer.
However, that limit did not apply on rivers.
As a result swimmers and boaties can come into close contact and needed to be considerate and cautious, he said.
Swimmers needed to remain visible in the water and jet boat drivers needed to travel at speeds that allowed them to navigate the river and avoid those in the water.