How Wine Is Made: From Grapes to the Finished Bottle

Quick answer: how is wine made?

Wine is made by harvesting grapes, receiving and sorting them, then crushing, destemming or pressing them as appropriate. The juice or crushed fruit is fermented, usually by yeast, which converts grape sugar into alcohol and carbon dioxide.

After fermentation, the wine may be pressed, clarified, matured in stainless steel, concrete, oak or another vessel, and sometimes exposed to lees—the sediment left after fermentation. Winemakers may also use malolactic conversion, blending, clarification, filtration and stabilisation before bottling.

The main difference between red, white and rosé wine is how the juice, skins and sometimes stems are handled. Sparkling and fortified wines follow these broad steps but include additional production choices.

The winemaking process, step by step

1. Harvest and grape reception

Harvest is the point at which grapes leave the vineyard and enter the winery. Timing affects the fruit’s sugar, acidity, pH, flavour development and condition. The decision is not simply about picking as soon as grapes are ripe: the desired wine style and the condition of the fruit also matter.

At the winery, grapes may be weighed, sampled, inspected and sorted. Sorting can remove leaves, damaged fruit, underripe berries and other unwanted material before processing.

Australian wine is made across diverse climates and regions, from warm inland areas to cooler coastal and elevated sites. These conditions influence the fruit, but they do not guarantee one particular style. Variety, vintage, vineyard site and winemaker decisions matter too.

2. Crushing and destemming

Crushing breaks grape berries so juice is released. Destemming separates berries from the bunch stems. These are separate decisions: grapes may be crushed and destemmed, crushed with some stems retained, or pressed as whole bunches.

For red wine, crushed grapes and their juice are often transferred to a fermenter together. For many white and rosé wines, grapes are pressed early so the juice can be separated from the skins.

Some red wines include whole bunches or whole clusters during fermentation. This can affect structure and aromatic character, but it is not automatically better or more traditional. The result depends on the grape variety, stem condition, proportion of whole bunches and fermentation conditions. See whole-bunch fermentation for the focused explanation.

3. Fermentation: the crucial transformation

Alcoholic fermentation is the biological step that turns grape juice into wine. Yeast consumes grape sugar and produces alcohol and carbon dioxide, along with compounds that can influence aroma and texture. Learn more in what fermentation is and what yeast does in wine.

Winemakers may use a selected commercial yeast culture, naturally occurring yeast, or a combination of approaches. “Native yeast” does not mean fermentation without microorganisms; yeast is essential to the process.

Fermentation can be managed through decisions about temperature, oxygen, nutrients, vessel and timing. These choices influence how quickly fermentation proceeds and which aromas and textures develop. No single approach guarantees a particular result.

How red wine is made

A typical red-wine process looks like this:

1. Grapes are sorted and often crushed and destemmed.
2. The juice, skins, seeds and sometimes stems enter a fermenter.
3. Alcoholic fermentation begins.
4. The skins rise to form a cap.
5. The cap is wetted and mixed through techniques such as pump-overs or punch-downs.
6. Skin contact extracts colour, flavour and tannin.
7. The wine is pressed when the desired balance of extraction and structure is reached.
8. It may undergo malolactic conversion.
9. It matures, then may be clarified, stabilised, blended and bottled.

The cap matters because the skins can float above the liquid. Cap management brings the fermenting wine into contact with the skins. More extraction is not automatically better: the appropriate level depends on the intended style and the condition of the fruit.

Pressing separates wine from skins, seeds and other solids. Liquid that drains with little pressure is often called free-run wine; liquid obtained by applying pressure is press wine. These fractions may be kept separate or blended later. Press fractions are not automatically inferior.

How white wine is made

White wine is commonly made by pressing grapes before fermentation:

1. Grapes are sorted.
2. They may be pressed as whole bunches or after limited crushing.
3. Juice is separated from skins and solids.
4. The juice may be clarified.
5. Alcoholic fermentation takes place, generally without extended skin contact.
6. The wine may mature in stainless steel, concrete, oak or another vessel.
7. Lees contact, malolactic conversion, blending, clarification, filtration and stabilisation may follow.
8. The finished wine is bottled.

White wine does not always mean zero skin contact. Some wines made from pale-skinned grapes ferment with their skins for a period, creating a different style. The important distinction is that white wine is commonly separated from the skins before fermentation, while red wine commonly ferments with them.

Stainless steel can help preserve a fresh, fruit-focused style, while oak may add oxygen exchange and oak-derived characters. These are tendencies, not guarantees.

How rosé is made

Rosé is usually made by limiting colour extraction from red-grape skins. Three broad approaches are common:

• Short skin contact: crushed red grapes remain with their skins briefly before the juice is drained or pressed.
• Direct pressing: red grapes are pressed soon after harvest, allowing only limited skin contact during pressing.
• Saignée: some juice is drained from a red fermenter and made separately as rosé. The remaining red wine is also changed because the ratio of juice to skins has been altered.

These methods are distinct, but they can overlap in practice. Rosé is not simply made by mixing red and white wine, and no one production method guarantees quality.

How sparkling wine is made

Sparkling wine is wine containing dissolved carbon dioxide. A common pathway begins with a still base wine, followed by another fermentation or another defined method for retaining bubbles.

In the traditional method, a second fermentation takes place in the bottle. The wine may then spend time on lees before further steps prepare it for release.

In the tank method, the second fermentation takes place in a pressurised tank before the sparkling wine is filtered and bottled under pressure.

In an ancestral or pét-nat pathway, wine is bottled before fermentation has completely finished, allowing fermentation to continue partly in the bottle. Individual wines can vary, so these terms should not be treated as one universal recipe.

In Australia, “sparkling wine” or “traditional method” is appropriate broad terminology. Champagne is a protected regional name, not a generic term for Australian sparkling wine. Learn more about sparkling wine.

How fortified wine is made

Fortified wine has grape spirit, brandy or another grape-derived spirit added. The timing matters.

If spirit is added while fermentation is still underway, yeast activity stops sooner and more grape sugar may remain, producing a sweeter style. If fermentation continues further before fortification, the resulting wine may be drier. Fortified wine is therefore not always sweet.

After fortification, the wine may mature in wood, tank, bottle or another vessel. Australian terms such as Apera and Topaque have specific naming contexts, so “fortified wine” is the safest broad category when explaining the process. See fortified wine.

What happens after fermentation?

Malolactic conversion

Malolactic conversion is a bacterial process in which sharper malic acid is converted into softer lactic acid. It can change acidity, mouthfeel and stability.

It is common in red wine and may be used in some white and sparkling wines, but it is not universal. Some wines are managed to encourage it; others are kept from undergoing it. Read more about malolactic fermentation.

Maturation and vessels

Wine may mature in stainless steel, concrete, oak, large wooden vessels or other containers. Vessel choice affects oxygen exposure, temperature control, texture and, in the case of oak, the possible transfer of oak-derived compounds.

Oak is not synonymous with maturation. Wine can mature without oak, and the influence of oak varies with the vessel’s age, size, toast, species, contact time and the wine itself. Explore what oak does to wine.

Lees contact

Lees are the solids left after fermentation, including yeast cells and other grape and microbial material. Keeping wine on lees can influence texture and contribute savoury or yeast-derived characters. Stirring lees is known as bâtonnage.

Lees contact is optional and does not automatically mean that a wine is natural, unfiltered or better. Its effect depends on the duration, condition of the lees, stirring, vessel and wine.

Clarification, filtration and stabilisation

Wine can clarify naturally as solids settle, or winemakers may use settling, flotation, centrifugation, fining or filtration.

Fining uses a clarifying material to remove selected suspended or dissolved components. Filtration passes wine through a medium to remove particles and, when sufficiently fine, microorganisms.

Stabilisation helps wine remain acceptably clear and sound after bottling. Cold stabilisation, for example, can reduce the risk of tartrate crystals forming later. A clear wine is not automatically better, and an unfiltered wine is not automatically more authentic.

Blending and bottling

Blending may combine different grape varieties, vineyard parcels, vessels, press fractions, vintages or lots. It is a normal winemaking tool used to shape balance, consistency and style.

Before bottling, the wine may be checked for clarity, stability, microbiological condition and packaging compatibility. Bottling does not necessarily stop development: wine can continue to change after it leaves the winery.

What changes the flavour of wine?

Winemaking choices can influence the finished wine in several ways:

• Grape ripeness: can affect alcohol, acidity, body and fruit character.
• Skin contact: can contribute colour, tannin and phenolic texture.
• Stem inclusion: may contribute structure or herbal and spicy characters.
• Pressing: can affect texture and the composition of the juice.
• Fermentation temperature: can influence fermentation speed and aroma expression.
• Yeast: can affect fermentation behaviour and aroma compounds.
• Oxygen exposure: can influence freshness, reduction, oxidation and development.
• Vessel choice: affects temperature, oxygen exchange and possible oak influence.
• Lees contact: can contribute texture and savoury complexity.
• Malolactic conversion: can alter acidity, mouthfeel and stability.
• Clarification and filtration: can support clarity and microbiological stability.
• Blending: can bring different components into balance.

These are relationships, not guarantees. The same technique can produce different results depending on the variety, fruit condition, pH, temperature, timing, vessel and winemaker’s objective.

It is also worth separating production descriptions that are often confused. Natural or minimal-intervention wine, organic wine and biodynamic wine are not interchangeable terms. None automatically guarantees a particular flavour, health outcome, additive-free status or level of authenticity.

The simple way to remember winemaking

The journey is:

Grapes → sorting → crushing, destemming or pressing → fermentation → extraction or separation → maturation → clarification and stabilisation → blending → bottling.

The route branches along the way. Red wine usually keeps skins during fermentation; white wine commonly separates juice first; rosé limits colour extraction; sparkling wine develops bubbles; and fortified wine receives grape spirit or brandy.

That is why winemaking is best understood as a set of connected choices rather than a single recipe.

Frequently asked questions

Is wine made from grape juice?

Yes, but red wine commonly ferments with crushed grapes, including skins and seeds, rather than with clarified juice alone. White wine is more commonly pressed first and fermented as juice.

Does all wine undergo malolactic fermentation?

No. Malolactic conversion is common in red wine and used in some white and sparkling wines, but it is not required for every wine.

Is rosé made by mixing red and white wine?

That is not the standard explanation for rosé. Broad approaches include short skin contact, direct pressing and saignée.

Is all sparkling wine made in the bottle?

No. Traditional-method sparkling wine has a second fermentation in the bottle, while tank-method sparkling wine has its second fermentation in a pressurised tank. Ancestral methods follow another pathway.

Is all fortified wine sweet?

No. Fortification timing affects how much sugar remains, so fortified wines can range from dry to sweet.