Why does White Port taste like that?

Characteristically low tannin and medium-full body. Commonly associated with dried apricot, honey, orange peel, caramel.

Not claiming: That every wine from this variety shows these characteristics. This is the range across the category, and site and winemaking move wines within and beyond it.

Characteristically very low tannin and high acidity. Commonly associated with lemon, green apple, lime peel, wet stone.

Not claiming: That every wine from this variety shows these characteristics. This is the range across the category, and site and winemaking move wines within and beyond it.

Warmer growing seasons are associated with faster sugar accumulation and lower retained acidity, so fruit reaches a given potential alcohol earlier in the season.

Varies: Above the vine’s photosynthetic optimum the relationship reverses: extreme heat stalls ripening, inhibits anthocyanin synthesis and can raise sugar only through berry dehydration.

Not claiming: That warm regions necessarily make high-alcohol wine. Potential alcohol at any moment is a choice point; the producer decides when to pick.

A wide day–night temperature range is associated with better acid retention, because cool nights slow the respiration that consumes malic acid while warm days continue to ripen the fruit.

Not claiming: That altitude or continentality guarantees high acidity. Both widen diurnal range on average and neither determines the outcome.

Adding spirit raises alcohol above the level yeast can tolerate. Added during fermentation it halts the process, leaving unfermented grape sugar in the wine — which is why Port is sweet. Added after fermentation has finished, the wine remains as dry as it already was, which is the Sherry case.

Varies: Timing is the whole variable. The same operation on the same wine a week apart produces a sweet fortified wine or a dry one.

Not claiming: That fortification produces sweetness. It produces sweetness only when it interrupts a fermentation that still has sugar to work on.

Prolonged contact with air produces acetaldehyde and, over longer periods, sotolon, associated with walnut, curry leaf and dried-fruit characters.

Not claiming: That these characters indicate a fault. In oxidatively aged styles they are the intended result.

The fresh styles are for drinking now, over ice with tonic. Aged White Port carried in cask for ten, twenty or forty years is a different wine altogether, nutty and oxidative, and is sold at the age it has already reached.

Not claiming: That a wine of this style will develop these characters. Ageing potential varies by producer, vintage and storage, and most wine is better young.