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Location: Left bank of the Garonne, south-east of Bordeaux, near the Ciron.
Five communes: Sauternes, Barsac, Bommes, Fargues and Preignac.
Conditions: The wooded Ciron valley stays cool beside the warmer Garonne. Moist autumn air cools overnight and cold air collects in the valleys, allowing water vapour to condense into morning mist.
Why afternoons matter: Sun and ventilation help dry the botrytised ripe grapes, encouraging water loss and concentration. Persistent damp can favour damaging grey rot instead; these favourable conditions are not guaranteed every season.

Sémillon: Often supplies body and rounded texture and is particularly well suited to noble rot.
Sauvignon: Sauvignon Blanc can contribute fresh acidity and citrus aromas; Sauvignon Gris is also permitted. Freshness depends on the whole wine and season, not on one grape alone.
Muscadelle: An optional aromatic component that can add floral, musky or orange-zest notes. It is not compulsory in every blend.
Concentration: Botrytis promotes water loss and changes the fruit’s flavour composition.
Selection: Successive hand-picked passes, or tries, collect suitable berries or bunches.
Taste tendency: Sweet, concentrated wine can show apricot, citrus peel, honey and spice; these are tendencies.

Separate hierarchy: The sweet-white classification has three levels: Premier Cru Supérieur, Premier Cru and Deuxième Cru.
Château d’Yquem: The only Premier Cru Supérieur. Its category belongs to the sweet-wine list, not the five-tier red classification.
Premier Cru examples: Château Suduiraut and Château Rabaud-Promis are Sauternes First Growths; Château Climens is a Barsac First Growth.
Deuxième Cru example: Château Doisy Daëne in Barsac is a Second Growth in the same sweet-wine classification.
Appellation first: Classified estates come from Sauternes and Barsac. A dry wine from one of these estates does not inherit Sauternes or Barsac AOC merely from its producer.
The Rabaud split: Historic Rabaud was divided in 1903. Château Rabaud-Promis and Château Sigalas Rabaud both retain First Growth status from the original 1855 classification; they were not two separate named estates on the original list.

Separate origin: A dry cuvée from a Sauternes estate is not Sauternes AOC. Read its own appellation, wine style and vintage.
Y d’Yquem 2022: The producer’s booklet identifies a dry white Bordeaux, with 60% Sauvignon Blanc and 40% Sémillon. Its blend and origin are specific to this documented vintage.
G de Château Guiraud 2023: The estate’s technical sheet identifies a dry Bordeaux white, with 60% Sémillon and 40% Sauvignon Blanc. Treat it at the table as a dry white rather than as the estate’s sweet Sauternes.

Assess: Judge sweetness against freshness, concentration and alcohol, then assess any citrus-peel, apricot or honeyed development. Neither a universal sugar figure nor the Sauvignon proportion alone determines balance.
Pair: Try Roquefort, Stilton, pan-seared foie gras or duck with Asian spices. Desserts remain possible, but aim for a preparation no sweeter than the wine.
Service: Start around 8–10°C with a measured 70–90 ml pour and allow complex aromas to open in the glass. A dry estate cuvée such as Y should instead receive dry-white service and a suitable fish or cream-sauced poultry pairing.