I was thinking of like june 9 or 16 it should be plenty warm by then.
June is pretty much thrashed for me between Jetski Racing and Graduations.
How about July 14/15 or July 21/22?
Post up your Saturday/Sunday preference as well as a weekend preference.
Lake Geneva is big so the water usually takes until mid summer to get warm. I usually play on the smaller lakes until July comes around.