The swim is in a fishing lake, which is/was bloody silty, if you're not in the first wave the water viz will be near zero. You have to run across a field to get from the lake to T1.
I did this a few years back. It was well run, a good bike and run, but as FF says the swim was pretty horrid. The lake was v shallow pretty much all the way round, and so silty that if you let water run out your hand you'll be left with a pile of it; there was zero visibility. My wave started lunch time, so if your earlier in the day perhaps not so bad?