Sailing Weather
Typical water temperature in late June: 60 degrees
Typical air temperature in late June: Highs 70-80 degrees F, lows 55-60
Wind speed: 10-30 knots.
National Weather Service forecast: Zone Area Forecast for Western Columbia River Gorge (weather.gov)
A local sailor makes a much more detailed daily forecast: Mt. Hood snow and Gorge wind forecast | The Gorge is my Gym