Its kind of funny. I got up way too ealry a few times, then would check the lake/wind and the water was always kind of rough so I skipped it. Then I went down to the desk and they said sunrise was at 7:10 so went out at 6:50 (which was like 5:50 because the clocks just changed a few nights before) and that day it was pretty calm.
Short answer would have been around 7AM I guess (kind of bored tonight).