Ask most winemakers in the Northern Hemisphere when their year really begins, and most will skip right past January, and say September — also known as harvest.
Those few weeks when grapes finally come off the vines, get crushed, and start the slow turn into whatever ends up in your glass two, five, or twenty years from now.
Everything that happened earlier in the season: the rain, the heat waves, every pruning call, the pests nobody wanted to deal with, it all comes down to this one stretch, and there are no do-overs.
Pick too early and the grapes haven’t caught up yet: high acid, low sugar, thin wine that never quite arrives. Wait too long and the sugar keeps climbing while the acid drops out from under it, and suddenly you’ve got something flabby, or boozier than anyone planned.
So, during these weeks, winemakers are out walking the rows constantly, tasting grapes straight off the vine, checking sugar and acid almost daily.
Sometimes the call to pick lands at 5 a.m. because there’s a storm coming and only a six-hour window before the whole crop is at risk.
Vineyards almost never get picked all at once, because different grapes ripen on their own schedule. A wine producer might bring in Chardonnay in early September and not touch the Cabernet Sauvignon until well into October.
Some crews still hand-pick, laying bunches gently into small bins so nothing gets crushed before it hits the press. Others bring in machine harvesters that can clear acres overnight, which matters a lot when rain is closing in. Neither one is “better”, as it comes down to the grape, the site, and what the winemaker’s actually trying to make.
“Vintage” isn’t just a year stamped on a label, it’s shorthand for everything that happened that growing season, and September is where it all gets locked in. A hot, dry month makes a different wine than a cool, wet one: different sugar, different acidity, different aging potential.
That’s why the same wine from the same producer can taste different from one year to the next. Nothing went wrong. It’s just what the weather handed them.
Here are a Few Common Questions About Harvest:
What is wine harvest season? It’s when ripe grapes get picked for winemaking — usually late summer into fall in the Northern Hemisphere, with September as the busiest stretch.
Why does the timing matter so much? Sugar and acid keep shifting day to day as grapes ripen. Too early and you get something thin and sharp. Too late and you risk flat, overly alcoholic wine. Winemakers are tasting and testing nonstop trying to catch that window.
What does “vintage” actually mean? The year the grapes were picked. Since every growing season is different, the vintage shapes how the wine turns out, which is why two bottles of the same label can taste completely different depending on which year is on the bottle.
So, here’s the question: You love what’s in your glass, but do you actually know what’s happening in it? We think finding out should be interesting (and fun).
That’s exactly what our courses are for. Start with the basics in WSET Level 1, go deeper with WSET Level 2, start thinking like a pro in WSET Level 3, or go all the way with DipWSET.
Wherever you are on your wine journey, there’s a seat for you at the table.
