Tasting Conditions
First, make note of the circumstances surrounding your wine tasting experience that may affect your impressions of the wine: A noisy or crowded room makes concentration difficult. Cooking smells, perfume and even pet odor can destroy your ability to get a clear sense of a wine’s aromas. A glass that is too small, the wrong shape, or smells of detergent or dust, can also affect the wine’s flavor.
The temperature of the wine will also have an impact on your impressions, as will the age of the wine and any residual flavors from whatever else you have been eating or drinking. You want to neutralize the tasting conditions as much as possible, so the wine has a fair chance to stand on its own. If a wine is served too cold, warm it with your hands by cupping the bowl.
If a glass seems musty, give it a quick rinse with wine, not water, swirling it around to cover all the sides of the bowl. This is called conditioning the glass. Finally, if there are strong aromas nearby—especially perfume—walk as far away from them as you can and try to find some neutral air.
Evaluating by Sight
Once your tasting conditions are as close to neutral as possible, your next step is to examine the wine. The glass should be about one-third full and you should loosely follow the following steps to completely evaluate the wine visually.
Straight Angle View
First, look straight down into the glass, then hold the glass to the light, and finally, give it a tilt, so the wine rolls toward its edges. This will allow you to see the wine’s complete color range, not just the dark center. Looking down, you get a sense of the depth of color, which gives a clue to the density and saturation of the wine. You will also learn to identify certain varietal grapes by color and scent. A deeply-saturated, purple-black color might well be syrah or zinfandel, while a lighter, pale brick shade would suggest pinot noir or sangiovese.
Side View
Viewing the wine through the side of the glass held in light shows you how clear it is. A murky wine might be a wine with chemical or fermentation problems. On the other hand, it might just be a wine that was unfiltered or has some sediment due to be shaken up before being poured. A wine that looks clear and brilliant and shows some sparkle, is always a good sign.
Tilted View
Tilting the glass so the wine thins out toward the rim will provide clues to the wine’s age and weight. If the color looks quite pale and watery near its edge, it suggests a rather thin, possibly insipid wine. If the color looks tawny or brown (for a white wine) or orange or rusty brick (for a red wine) it is either an older wine or a wine that has been oxidized and may be past its prime.