How Different California Varietal Wines Age
Some California varietal wines — especially the better vintages from years in which climatic conditions were superb — age remarkably well or even improve with aging. However, it’s perfectly fine to drink California wines without waiting for them to come around. This is true for the vast majority of wines from the Golden State.
Discussions about older wines and aging wines are based on the presumption that the wines have aged in proper conditions, such as a temperature-controlled cellar or a special wine-storage refrigeration unit.
Generally speaking, California red wines age much better than California whites. The following describes how well the six major California varietal wines hold up over time:
Cabernet Sauvignon: Cabernet Sauvignon and Cabernet blends are definitely California’s longest-lived wines, by a wide margin. Even many California Cabernets from the 1940s, 1950s, and 1960s are mostly still fine to drink. But of course, not every California Cabernet will age well; only certain wines from the better vintages can stand the test of time.
Zinfandel: Red Zinfandels definitely age well; many 30-year-old Zinfandels are delicious. But Zinfandel does lose its characteristic berry-like flavor with time and in fact comes to resemble Cabernet Sauvignon. If you like the taste of young Zinfandel, you should probably drink your Zinfandels within 15 years.
Merlot: Not many California Merlots have been around long; before 1985, most winemakers used Merlot mainly as a blending wine. Generally, California Merlots are ready to drink sooner than California Cabernets; they’re usually softer, fruitier, and less tannic than Cabernets. Some believe that most Merlots will not age as long as Cabernets and are at their best within the first 12 to 15 years.
Pinot Noir: Generally speaking, Pinot Noir wines from a fairly low-tannin variety don’t age as long as Cabernet Sauvignons. To be on the safe side, you may prefer to drink California Pinots that are less than 10 years old so that all the wonderful, fresh aromas and flavors inherent in this variety are still at their peak.
Chardonnay: A few of the very best California Chardonnays can age and even improve with up to 15 years of aging — the likes of Hanzell, Long Vineyards, Mount Eden, Matanzas Creek, and Stony Hill, for example. But generally speaking, California Chardonnays more than 10 years old can be disappointing. Therefore, you may want to drink Chardonnays within 10 years of the vintage — with the exception of those few Chardonnays that have a proven track record for aging.
Sauvignon Blanc: California Sauvignon Blancs for the most part are best when they’re young and fresh; most will not age well or improve after 5 or 6 years. Of course, there are exceptions: Robert Mondavi’s very limited-production I-Block To Kalon Vineyard Fumé Blanc — from a vineyard planted in 1945, the oldest Sauvignon Blanc vineyard in the U.S. — can probably age for decades. Mayacamas Vineyards also makes a long-lived Sauvignon Blanc.

Wine Glossary
American Viticultural Area; AVA
In the United States, a term that defines the geographical boundaries of a specific wine zone or region. For example, Napa Valley is the name of the AVA within Napa County.

Wine Glossary
AOC
An acronym for Appellation d’Origine Contrôlée (the shortened form is Appellation Contrôlée, or AC). AOC is a classification relating to the quality of a wine produced in the European Union (EU).

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AOQS
An acronym for Appellation d’Origine de Qualité Supérieure. AOQS is a classification relating to the quality of a wine produced in the European Union (EU); in this case, refers to a wine of superior quality.

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appellation
In the European Union, a registered place name listed on a wine label that indicates the origin of the wine. Sometimes called appellation of origin.

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aroma
A wine descriptor that refers to how a wine smells.

Wine Glossary
balance
A standard that wine experts use to judge wine quality; the relationship of four components (acidity, sweetness, tannin, and alcohol) to each other.

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body
A wine descriptor that explains how heavy a wine feels in your mouth (often related to the alcohol content). Wines are often described as light-bodied, medium-bodied, or full-bodied.

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bouquet
A wine descriptor that refers to how a (typically well-aged) wine smells.

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complexity
A standard that wine experts use to judge wine quality; refers to a characteristic of a wine that has multiple flavors and aromas (usually a better quality wine).

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crisp
A wine descriptor that refers to a wine with refreshing (typically high) acidity.

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decanter
A glass container that can hold the contents of an entire bottle of wine; often used to aerate the wine (let it breathe before consuming).

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depth
A standard that wine experts use to judge wine quality; indicates a wine that gives the impression of having many layers (rather than being "flat" tasting).

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DO
An acronym for Denominação de Origen. DO is Portugal’s highest quality ranking for their wines.

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DOC
An acronym for Denominazione di Origine Controllata. DOC is a classification referring to a quality wine produced in Italy.

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DOCG
An acronym for Denominazione di Origine Controllata e Garantita. DOCG is a classification relating to a small group of elite (high-quality) wines produced in Italy.

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dry
A wine descriptor that refers to a wine that is not sweet. Wines can be classified as dry, off-dry (or semi-sweet), or sweet.

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fermentation
The process (during winemaking) in which yeasts convert the sugars in a grape juice to alcohol and carbon dioxide.

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finish
A wine descriptor that refers to the impression a wine leaves in your mouth after you taste and swallow it (the aftertaste). A standard used to judge wine quality.

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flavor intensity
A wine descriptor that refers to how strong or weak a wine's flavors are.

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fruity
A wine descriptor that refers to a wine that has aromas and flavors that suggest fruit.

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IGT
An acronym for Indicazione di Geografica Tipica. IGT is a table wine classification for Italian wines that list a geographic location on the wine label.

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length
A standard that wine experts use to judge wine quality; indicates a wine that you can taste on the full length of your tongue, rather than just the front of your tongue.

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oaky
A wine descriptor that refers to a wine that has flavors of oak, usually due to storage in oak barrels.

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palate
A term that wine tasters use synonymously for mouth.

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QbA
An acronym for Qualitätswein bestimmter Anbaugebiet. QbA is a classification referring to a quality wine from a special region in Germany.

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QmP
An acronym for Qualitätswein mit Prädikat. QmP is a classification referring to a quality wine with special attributes produced in Germany.

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QWPSR
An acronym for Quality Wine Produced in a Specific Region. QWPSR is a classification referring to quality European wines that have official place names.

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sediment
Refers to solids (tannin and other matter) that develop in some red wines over time.

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soft
A wine descriptor that refers to a wine with a smooth feel in the palate; usually refers to wines with low acidity.

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sommelier
An expert wine specialist who typically assembles a wine list and recommends wines that pair with specific foods.

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tannic
A wine descriptor that refers to a firm, red wine that leaves a dry feel in the palate.

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tannin
A substance in grape skins that contributes to how a red wine tastes.

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terroir
A French word (pronounced ter wahr) that refers to the unique combination of topsoil, climate, altitude, and other natural factors that a particular vineyard or wine region has.

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typicity
A standard that wine experts use to judge wine quality; refers to whether a particular wine is true to its type (for the specific grape variety).

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varietal
A wine that is named after the principal (or sole) grape variety used to produce the wine.

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vintage
The year in which the grapes for a specific wine were grown and harvested.

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VR
An acronym for Vinho Regional. VR indicates a table wine classification for Portuguese wines.