There is easy access to Potholes Reservoir at Perch Point, with a long deserted coastline of sand and fist size rocks. The NW area of the lake has tons of flatwater lagoons and shallow sandy bottom but you really need a boat to access this area (or a sand dune capable vehicle and come in from the sand dune area south of moses lake.) The water level is high right now (June) and is generally 15ft lower by the end of the summer, when there is a wide sandy border to all those lagoons and little islands.

Wind
Not an unusually windy place but when it does blow it is typically SW and pretty steady 12m conditions.
Weather.com sensor and forecast here (http://www.weather.com/weather/today/Potholes+Golf+Course+WA+1046949:5?from=golf_courseprofile). The sensor seems to read a little high. WSU sensors here (http://weather.wsu.edu/). These usually read much lower than the first link. The truth is probably somewhere in-between. Grant County airport sensor (http://weather.noaa.gov/weather/current/KMWH.html), 10 miles to the north. NOAA Zone forecast (http://www.weather.gov/view/prodsByState.php?state=WA&prodtype=zone), search for Moses Lake. NOAA Point forecast (http://forecast.weather.gov/MapClick.php?lat=46.99851933611913&lon=-119.28165435791015&site=otx&smap=1&unit=0&lg=en&FcstType=text).