Nothing makes for a refreshing wine on a sun-lit patio like a German Riesling.
Rieslings are made in a wide variety of styles, from dry to slightly sweet. You won't find any oak in these wines they are pretty much the opposite of chardonnay. Compared to most chardonnays, they have a light body and are lower in alcohol. The aromas can show fruit, flowers or minerals, depending on the winemaker. So it is advisable to find a maker of Riesling you like and buy that wine.