Perched at 900m altitude, we're working with a different set of rules. Our low-intervention winemaking means letting the terroir speak which means we get to make wines that are innovative, textural, aromatic, and zingy.
The Science of Up Here
The higher you climb, the cooler it gets. You lose roughly 0.65°C for every 100 metres of elevation. That might not sound like much, but at our altitude, it’s the difference between grapes that rush through ripening and grapes that take their time getting there.
Here’s what happens up here that doesn’t happen down in the valley:
Day-to-night Temperature Swing
This is the daily temperature dance between hot days and cold nights, and the swings can be massive at altitude. During the growing season, we can see swings of 15-20°C between day and night, sometimes even more. Warm days drive photosynthesis and sugar development. Then the sun sets, temperatures drop, and everything hits pause. The grapes keep their natural acidity and aromatic compounds instead of burning through them. This is why high-altitude wines often have a certain freshness.
Temperature changes also fundamentally change how compounds develop in the grape. During the day, grapes produce sugars, polyphenols, malic and tartaric acids. At night, when temperatures drop below about 13°C, respiration slows or stops entirely. That’s when we end up with grapes that ripen slowly and evenly, developing complex flavours while holding onto the structure that makes wine interesting.
UV Radiation
UV radiation increases by roughly 10-12% for every 1,000 metres you gain in elevation. Grapes can’t slap on sunscreen, so they protect themselves by developing thicker skins and producing more phenolic compounds, particularly flavonols, anthocyanins (pigments), and tannins. These compounds give wine colour, structure, and age-worthiness.
The UV exposure also triggers increases in terpenoids; the aromatic compounds that give wines their floral, citrus, and herbal notes.
The Cool-Climate Advantage
Cool-climate viticulture works best when varieties ripen late in the season, when the balance of sugars, acids, and phenolic compounds hits its sweet spot. At our elevation, we get the extended growing season that allows varieties like Gewürztraminer and Tempranillo Blanco to fully express themselves. These aren’t varieties you’d typically associate with Australian wine, but up here? They thrive.
The extended ripening period means flavour development happens at lower sugar levels. You get wines with moderate alcohol, bright acidity, and distinct aromatics. Not the jammy, high-octane styles that come from fruit in hot climates.
What This Means in the Glass
All of this comes together in the glass. The temperature swings, the UV exposure, the extended growing season. Our wines have texture and vitality. They’re aromatic, with clarity of flavour that comes from fruit ripened slowly and deliberately. A balance of natural acidity and structure without heaviness.
This isn’t something we manufacture in the winery. It’s built into the grapes by the time they arrive. Our job is to not mess it up. We work with minimal intervention because the fruit already has everything it needs. Low-intervention winemaking at altitude means letting the terroir speak and Topper’s Mountain terroir has a lot to say.
As the climate changes, altitude is becoming more and more important.
Traditional wine regions in coastal and low-altitude areas such as southern Europe, California, parts of Australia, are being hit hard. Research suggests that a significant number of these regions may struggle to produce quality wine economically by the end of the century if warming exceeds 2°C. Meanwhile, higher-elevation sites and cooler regions are becoming increasingly viable. Vineyards are shifting upward in altitude and closer towards the poles in latitude, searching for the temperature conditions that used to exist at lower elevations.
In mountainous wine regions like Mendoza, or Rioja, winemakers have been planting progressively higher for decades as a response to warming.
For us at Topper’s Mountain, this means we’re sitting in a pretty fortunate spot. Our altitude is saving us from the worst of the compressed ripening periods, heat stress, and loss of acidity that many lower-elevation vineyards are grappling with.
We’ve watched our picking period shift earlier and earlier each year. Last year, for the first time, we picked in January just, on 31st! This means we’re picking 2-3 weeks earlier than two decades ago.
However, it’s at the end of the vintage where things have really changed. In the 2000s, we were finishing vintage with Touriga Nacional & Nebbiolo in very late April or the first week of May. In 2024 and 2025, vintage was done and dusted by the end of the first week of April – and it looks like this will be the same for vintage 2026.
Rare Varietals, Perfect Fit
High-altitude cool-climate viticulture rewards creativity. It opens the door to rare varieties that struggle in conventional Australian wine regions. And because the conditions naturally promote balanced ripening, we get fruit with the complexity and structure to make distinctive, age-worthy wines. This is why Gewürztraminer works so well here, it demands cool nights to preserve its signature aromatics.
Altitude fundamentally changes how grapes develop. And for us, that means we get to make wines that are innovative, textural, aromatic, and zingy.
When you open a bottle of Topper’s Mountain wine, you’re tasting the Tingha Plateau. You’re tasting 900 metres of elevation and everything that comes with it. The ancient red volcanic ash soils as well as the thin air, the intense sun, the cool nights.
