Yup.
We have a similar wetland lakes setup near us, and I always knew tigers liked the wetlands as they eat frogs etc. Till...... I went water skiing there ( only people there on weekends in summer so the snakes don't get frightened off by lots of ppl)........... and the buggers swim alright.
Scariest thing (whether u are terrified of them like me, or even if you are a 'normal' person) when you are just starting off in the shallows and a ****in tigersnake swims towards you in an aggressive manner (in attack mode).
But hey a good windsurf is worth it, give it a go. I would not want to put a dampener on anyone's enjoyment