We must pay special attention to the wind on Lake Champlain. Weather conditions, especially winds, can quickly change for the worse. This site will help to predict wave height according to the time of day. The accuracy isn’t 100%, please be safe and stay off the water if you have any doubt.
This simple website helps to have an idea for the wind and the waves. It predicts the wave and the wind at a specific time on the lake with a graphical representation.
You should always consider using another, or several other forecasts before deciding whether or not to head out onto the lake.