Environment Southland has partnered with More FM to host this year's mid winter swim at Oreti Beach.
The Environment Court has received 25 appeals on the proposed Southland Water and Land Plan.
Air pollution is already causing concern, with the first exceedance for the year recorded.
Monitoring carried out by Environment Southland shows there are still high levels of the toxic algae planktonic cyanobacteria in the Waituna Lagoon.