How to know if a wine needs decanting?

Figuring out whether to decant comes down to three simple tests you can do in seconds.

Test 1 — The tannin check: Take a sip straight from the bottle. If your mouth feels dry, grippy, and your gums tighten, those are aggressive tannins that will soften with air. Decant for 1-2 hours. This applies to most young wines made from Cabernet Sauvignon, Nebbiolo, Tannat, Malbec, and Mourvèdre.

Test 2 — The sediment check: Hold the bottle up to a light. See particles or dark gritty stuff at the bottom? That's natural sediment from ageing — harmless but gritty in the mouth. Decant gently to separate the clear wine from the sludge. Common in wines over 8-10 years old.

Test 3 — The smell check: Give the wine a sniff right after opening. If you get struck match, rotten egg, or burnt rubber, that's reduction — sulphur compounds that built up in the closed bottle. A 15-30 minute decant usually clears it right up. If the smell persists after 30 minutes, it might be a fault rather than simple reduction.

When NOT to decant: light, fruity reds like Beaujolais or young Pinot Noir (they lose their charm with too much air), aromatic whites like Sauvignon Blanc and Riesling (volatile aromas disappear), sparkling wines (you'll lose the bubbles), and extremely old, fragile wines that might collapse.

The uncertainty trick: pour two glasses. Swirl one aggressively for 30 seconds, leave the other alone. Taste both after 10 minutes. If the swirled glass tastes noticeably better, the wine wants decanting. If they taste the same or the still glass is better, skip it.