Ale Beer – What It Is and What Styles It Includes

Ale beer is not a single style, but a vast family of beers fermented primarily by Saccharomyces cerevisiae strains, traditionally called top-fermenting yeasts. They usually work at warmer temperatures than lager yeasts and can influence the aroma and taste of beer more decisively. “Can” is the key word here, as ale doesn’t have to be strong, bitter, dark, or even particularly fruity. This same family includes diverse styles such as the subtle Kölsch, banana-clove weizen, hoppy IPA, peppery saison, and coffee-chocolate stout.

Ale Beer – What Exactly Is It?

The simplest definition is: ale is beer brewed with top-fermenting yeast. However, this says more about the fermentation method and microbiological lineage of the beer than what we’ll see in the glass and perceive with our senses.

The word “ale” on a label doesn’t promise a specific color, strength, or bitterness level. It’s merely a category, as broad as “red wine”: it superficially organizes the topic, but to predict the taste, we still need the grape variety, origin, and production method. In beer, these additional pieces of information include the style, yeast strain, grist, hopping, fermentation process, and any added ingredients.

It’s worth clarifying the most common misunderstanding right away. Almost every IPA is an ale, but ale does not automatically mean IPA. The first concept is contained within the second, just like stout, bitter, saison, or weizen. It’s like squares and rectangles. And why “almost”? Because in modern brewing, lager yeasts are increasingly used to produce IPA, yet the misleading abbreviation (India Pale Ale!) remains! So here we have a drastic inconsistency and incorrect beer labeling for marketing reasons – IPA as a concept simply sells better than India Pale Lager!

It must be noted that the division into ales and lagers is a very useful starting point for learning about beer, but not a complete systematics of all brewing. Spontaneous and mixed fermentations, the involvement of wild yeasts or bacteria, and hybrid-method beers quickly show that reality doesn’t always fit neatly into two boxes.

What Does “Top-Fermentation” Mean?

This name comes from historical observations of yeast activity and brewing practice. In open fermenters, traditional strains for ale production formed a rich layer of foam, sediment, and cells carried upwards by carbon dioxide on the surface. From this layer, yeast could be collected for the next batch. The English term top-cropping still describes this collection method today.

This doesn’t mean that every ale yeast cell remains on the surface throughout fermentation. That’s a convenient but false image. Yeast circulates in the fermenting beer; some goes into the foam, and after activity decreases, the cells flocculate and settle. In a modern cylindroconical fermenter, top-fermenting yeasts also eventually collect in the cone at the bottom of the tank and can be removed or harvested from there.

“Top” therefore describes the historical behavior and harvesting method of yeast, not an immutable law of its position. For a brewer, the characteristics of a specific strain are much more important: working speed, temperature range, attenuation, flocculation, alcohol tolerance, and produced aromatic compounds.

In modern brewing, it’s not the collection point of the yeast, but its recommended fermentation temperature that is a greater determinant of a lager vs. ale strain.

Ale Yeasts – The Many Faces of Saccharomyces cerevisiae

The name Saccharomyces cerevisiae encompasses an incredibly diverse group of domesticated yeasts. A neutral strain for American Ale type beers can allow the malt and hops to take center stage. English strains often contribute more esters, associated with apple, pear, or stone fruits. Many Belgian strains, in addition to esters, produce phenols reminiscent of pepper and spices.

A different set of associations comes from the classic wheat beer strain: isoamyl acetate smells of banana, and 4-vinyl guaiacol of clove. Kölsch yeasts can work very subtly, especially when fermentation is conducted cool. Norwegian kveiks, on the other hand, are known for their rapid work at temperatures where many ordinary ale strains would long ago have started producing undesirable aromas or lost good condition.

In the brewery, I’ve seen it many times: the same wort fermented with two different strains can yield beers surprisingly distant in sensory profile. The mere phrase “top-fermenting yeast” tells a brewer much less than the strain name and information on how it was managed.

Curiosity: Saccharomyces cerevisiae (literally: brewer’s yeast) is the same species of yeast used in baking. There are even beers fermented with yeasts described as baker’s yeast – for example, Finnish sahti. It’s worth keeping this in mind. Theoretically the same organism, but in different forms, can both help us bake bread and create hundreds of different types of beer.

How Is Ale Made?

Up to the start of fermentation, the path of an ale is similar to many other beers (see what beer is made from). Milled malt is mixed with water, and during mashing, enzymes break down starch into sugars. After separating the spent grain, the resulting wort is boiled, usually with hops. Then it must be cooled as quickly as possible, oxygenated appropriately for the given process, and the chosen yeast strain pitched.

This is when the decisive stage for a beer’s belonging to the ale family begins. Yeast consumes sugars and primarily produces ethanol and carbon dioxide, along with many compounds present in much smaller quantities. Esters, phenols, higher alcohols, sulfur compounds, or fermentation byproducts can build a desired profile or become a fault. The result depends not only on the strain itself but also on temperature, the number and condition of pitched cells, oxygenation, wort composition, pressure, and time.

After the vigorous fermentation phase, the beer remains with the yeast so they can finish their work and reduce some byproducts. Then comes conditioning, optional dry hopping, clarification, filtration, pasteurization – if the brewery uses it – and packaging into bottles, cans, or kegs. Some ale beers mature quickly and taste best fresh, while others improve after many months.

At What Temperature Does Ale Ferment?

For many classic strains, 18-22°C is a reasonable reference point. In literature and technical sheets, a broader, indicative range of around 15–26°C is also found. However, neither of these values defines ale; they are merely indicative values recommended by the manufacturer.

Kölsch is sometimes fermented at the lower end of the yeast’s temperature capabilities and then cold-lagered for a long time. Some Belgian strains are run warmer or allowed to gradually increase in temperature. Kveiks can ferment efficiently above 30°C; studies of individual cultures have shown that even within this group, heat tolerance strongly depends on the strain. Therefore, the manufacturer’s data sheet and the intended beer profile are better guides than a single “ale fermentation temperature” found in a table.

What Does Ale Beer Taste Like?

There isn’t one “ale taste.” When we only know that a beer belongs to this family, we still can’t be sure if it will be citrusy, caramel, roasted, sweet, dry, or bitter. The final aroma and taste are composed of four main elements – plus one notoriously overlooked by all compendiums!

Yeast

Beyond ethanol and carbon dioxide, yeast is responsible for producing many secondary substances. Esters can evoke sensory associations such as apples, pears, apricots, bananas, or tropical fruits. Phenols – desirable only in beers fermented with appropriate strains – contribute associations with clove, pepper, or other spices. The degree of attenuation also matters: yeasts that process more available sugars will usually leave the beer drier and lighter in perception. An excess of higher alcohols is not a “rich beer character,” but may indicate poorly managed fermentation. However, there are proponents of the theory that the aftertaste of alcohol in strong beers can be an advantage – though this is rather heterodox.

Hops

Citrus, mango, passion fruit, resin, flowers, herbs, and spices most often lead us towards a specific hop variety and its usage. New-wave IPAs don’t smell of grapefruit because they are ales, but primarily due to hop varieties, hopping methods, and a powerful dose of dry hopping; yeast can emphasize, change, or provide a clean background for this effect.

Malt

Light malts can contribute grain, fresh bread, biscuit, or cookie-like maltiness to beer. Caramel malts deepen notes of caramel, toasted bread crust, and dried fruits. Dark and roasted grains are responsible for chocolate, cocoa, coffee, and roasted notes in stout. These are not aromas “from top fermentation,” although appropriately selected yeasts can complement them or create space for their full beauty to shine.

Style and Recipe

The character of a beer is ultimately determined by the whole: raw materials, proportions, technology, and the brewer’s vision. We also cannot forget about water, which is the largest percentage component of beer, and its importance in the brewing process is too often overlooked! A few examples below will help illustrate the breadth of the ale family:

Is Ale Always Strong, Dark, or Bitter?

No. Ale doesn’t have to be dark, strong, or bitter! It can be straw-colored like Kölsch, golden like a tripel, copper like a bitter, brown like a brown ale, or almost black like a stout. As for alcohol content, light British milds and bitters can have little more than 3% alcohol, while barleywines and the strongest imperial stouts reach double-digit values. Let’s not forget that our Polish Grodziskie has about 2.7% alcohol and is a full-fledged ale. There is no single typical alcohol content for the entire ale family.

It can be said that a distinct bitterness suits many IPAs and bitters, but a mild mild, a sweetish milk stout, or some Belgian ales seek balance elsewhere. Bitterness is determined by the style, hop dosage, its utilization, and other recipe elements, not the fermentation type itself. Interestingly, ethanol also enhances the perception of bitterness, which is why stronger beers may seem more bitter. On the other hand, in lighter beers, a much lower concentration of isomerized alpha acids from hops (responsible for bitterness) gives a stronger sensation than in stronger beers. Hence, the IBU (International Bitterness Units) value itself tells us very little about the mouthfeel without considering the extract and strength of the beer, as well as individual predispositions.

Ale also doesn’t have to smell strongly of fruit. A neutrally managed American Ale strain can leave barely perceptible esters. Kölsch or Altbier are also known more for their restraint than for a fruity explosion.

It is also not true that ale is by definition hazy. Among top-fermented beers, we find both intentionally hazy hefeweizens and hazy IPAs, as well as crystal-clear bitters or Kölsches. The appearance depends on the style, raw materials, yeast, and post-fermentation beer processing.

Types of Ale – A Map of the Most Important Beer Styles

There is no single official list that exhaustively categorizes all the world’s beers. BJCP and PSPD group styles for competition judging, Brewers Association uses its own classification, and historical nomenclature and local traditions do not always correspond to the systems adopted by these organizations. Here, on Beer, Bacon & Liberty, I will gradually describe all possible types of beer. In the macro-category of ale, there can be dozens, or more – depending on the level of detail adopted. I hope the map below will help you choose your tasting direction.

British Ales

In Great Britain, milds, bitters, ESBs, English Pale Ales, brown ales, old ales, and English Barley Wines originated. It is also the homeland of porter and the stout derived from it. They are united by their roots, not a single taste. A bitter can be light, dry, and earthy-hoppy, a brown ale nutty, and a barley wine thick, strong, and full of dried fruits.

In traditional versions, the character of English yeasts and malts often plays a significant role. Hops don’t disappear, but usually don’t play the main solo role. Of course, there are attempts by new-wave hop growers for British hops to also play a leading role, but for now, these attempts should be treated as highly experimental.

Yeast for British-style ale beer usually emphasizes a fruity-caramel character and drinkability, producing many esters reminiscent of red fruits, but this is not an unshakeable rule.

American Ales

The American craft beer revolution took British models and cranked up the hop intensity to the maximum. Blonde Ale, American Pale Ale, American Amber Ale, American Brown Ale, numerous IPA varieties, and American Barleywine show different effects of this movement. Citrus, resin, and tropical fruits became hallmarks of many styles, but not the entire group. This is also the most dynamically developing beer scene, so what was revolutionary in the eighties is now treated as an anachronism.

Fads come and go, and market dynamics are moving towards heavily hopped beers for aroma and flavor, which are also highly drinkable. The peak popularity of very dry and extremely bitter IPAs has passed, but there is still a sizable group of fans of this approach, which grew out of both nostalgia and in opposition to current trends. The beauty of craft brewing is that everyone can find something for themselves.

American brewers eagerly combine expressive hop varieties with more neutral yeasts so that fermentation doesn’t overshadow the aroma of the beer spice. In modern hazy IPAs, the relationship is often more complex, as the right strain can co-create a juicy, fruity profile.

It is therefore necessary to distinguish several waves of American brewing and to stay up-to-date with current trends, as we may encounter yeasts that merely set the stage for hops, as well as those that, through both the properties of the strain itself and hopping technology (e.g., biotransformation), emphasize fruity notes.

Belgian and French Ales

Belgian Pale Ale, witbier, dubbel, tripel, Belgian Golden Strong Ale, and Belgian Dark Strong Ale differ greatly in color, strength, and recipe, but in many of them, the character of the yeast is immediately recognizable. Esters reminiscent of apricots meet peppery or clove-like phenols here, and the high alcohol content in the best examples remains elegantly woven into the taste and is an element of the overall composition.

Saison, in turn, grew out of the tradition of farmhouse beers from the Belgian-French border. Today’s interpretations vary greatly, but the classic direction leads to high attenuation, a refreshing character, dryness, pepperiness, and fruity nuances.

German Top-Fermented Beers

Kölsch, Altbier, and Weissbier, including Hefeweizen, clearly show why ale beers should not be equated with British or American Pale Ale. Kölsch is light, delicate, and cold-matured after fermentation. Altbier combines top fermentation with cold conditioning but usually has a darker, more malty character. Hefeweizen focuses on wheat and yeast-derived notes of banana and clove. We also have Dunkelweizens and Kristallweizens – dark and clear, respectively – without the classic haze from suspended yeast.

A German brewer will more often simply call them top-fermented beers rather than “ale” – a word associated with Britain. This is a local linguistic difference, not a technological error.

Polish Top-Fermented Beer

Our most distinctive contribution to this map is Grodziskie: a light, highly carbonated wheat beer smoked with oak wood. It is pale, dry, smoky, and distinctly bitter, yet usually has about 2.5–3.3% alcohol. It’s hard to find a better counter-argument to the idea that ale should be heavy, dark, and sweet.

Grodziskie beer is the only native beer style widely recognized in the brewing world. Over the past few years, its popularity has significantly increased due to intensive promotion by Polish breweries and judges.

On the Border: Wild, Sour, and Spontaneous Fermentation Beers

Wild and spontaneous beers should not be treated as a uniform subgroup of the ale family. A wild ale can begin its life as a classic top-fermented beer, after which additional fermentation is carried out with wild yeasts or bacterial cultures. Classic Belgian lambic is produced by spontaneous fermentation and does not fit purely into the ale-lager division, but I place these beers here as a culturally and sensorially close branch of beers fermented with yeasts and bacteria other than traditional S. cerevisiae.

In this group, yeasts and other microorganisms play a primary role, contributing notes of leather, barnyard, hay, cellar, as well as fruits associated with currants, cherries, pineapple, or apples. However, the flavor palette of lambics, as well as wild and farmhouse-inspired beers, is so rich that they deserve a separate entry.

Ale, Pale Ale, and IPA – What’s the Difference?

Ale is the broadest term: it encompasses the family of beers associated with top-fermentation yeasts. Pale Ale is a style belonging to it, or rather, a historically branched family of styles brewed predominantly with pale malts. India Pale Ale derives from the pale ale tradition, but now includes so many varieties that classifications usually separate IPA as a distinct stylistic group. What’s more, IPA today and IPA from the British Empire era are so different that there are now proponents of completely separating these beer families. In that case, English IPA (traditional)… would not belong to IPA, but to British ale type beers! IPA would then by default mean (American) India Pale Ale – and its subgenres would strictly refer to the American interpretation, not the British original. This is justified primarily by the structure of the current market and the popularity of specific beer styles.

However, the general relationship is easy to remember. Every classic (i.e., not lager-yeast fermented) IPA is an ale, but the vast majority of beers in the ale group are not IPAs. Pale Ale is also not synonymous with ale – just as red wine is not synonymous with wine in general.

Ale vs. Lager – The Most Important Difference

In modern, craft usage, the division is primarily based on yeast. Ale most often ferments with S. cerevisiae, and lager – with S. pastorianus. Lager strains usually work cooler and give a more neutral fermentation profile, while in ale, the contribution of esters can be more pronounced. “Usually” and “can be” are necessary variables, as the yeast type itself does not determine color, strength, or bitterness, and hybrid methods blur the lines.

A full comparison can be found in the article what’s the difference between lager and ale.

Which Ale to Choose to Start With?

Instead of looking for the most “typical ale” among dozens of beer styles, it’s best to start with the aromas and flavors you already enjoy. My beer style selection tool can help you with this. You can also start with the abbreviated table below:

For someone accustomed to a pale lager, the smoothest transition is usually provided by a Kölsch or Blonde Ale. IPA is not a mandatory gateway to craft beer; its bitterness and intense hopping can just as easily delight as deter.

That’s what the most popular approach says. Mine is a bit different. It’s best to go to a specialty store and buy one bottle of beer from distinctly different categories (i.e., skip two IPAs hopped with different hops – instead, get: APA, IPA, Blonde Ale, Kölsch, Hefeweizen, Saison, Bitter, Stout, English Porter, Dubbel, Tripel, Barley Wine, Grodziskie, Lambic). Fourteen bottles – fourteen totally different beers. Drink one or two a day. Note everything you smell and taste. What did you like about it, and what didn’t you? You don’t have to strive for judging scores or descriptors. This is meant to help you, not be a competition scorecard. Then you can delve deeper into the subgroups you enjoyed the most.

Most importantly: don’t give up on any subgroup, or even style, if you don’t like it the first time. Many more demanding beers have an acquired taste, just like good whiskey, a highly tannic red wine, or an intense blue cheese. Beer doesn’t have to be just for chugging – it can be an excellent subject for tasting.

Even better – if you drink these fourteen bottles with a group of friends – and share not only the drinks but, above all, the sensory impressions!

Where Did the Word “Ale” Come From?

Today, the English word beer means beer in general, and ale – the family discussed here. A few hundred years ago in England, however, both words could refer to two different beverages. Ale was a local malt beverage brewed without hops or with very little. Beer meant a hopped beverage, whose production method came from the continent.

The distinction became significant in the late Middle Ages when hops began to be imported into England and brewed with on a larger scale. The new ingredient not only added bitterness but also helped protect the beer from spoiling quickly. Over time, hops also caught on in ale, brewing practices began to intertwine, and the old linguistic boundary lost its meaning.

The modern meaning of ale, based mainly on the type of fermentation, is therefore younger than the ancient name would suggest. When reading old recipes, one must be careful: historical ale does not always mean the same thing as on the label of today’s beer.

Is Every Beer an Ale or a Lager?

No. This division works excellently as a first sketch, but some beers are produced by spontaneous or mixed fermentation, with the involvement of Brettanomyces, other yeasts, and lactic acid bacteria. In such a beer, the question “ale or lager?” may make less sense than a description of the microorganisms used and the fermentation process.

There are also techniques that straddle the usual division. Kölsch and Altbier ferment with top-fermenting yeasts, then cold-condition. California Common uses lager yeasts run relatively warm. Cold IPA most often combines a lager strain with warmer fermentation and a dry, heavily hopped profile associated with modern IPA. Kveik is still an ale, although its working temperatures contradict the textbook comparison of “warm ale versus cool lager.”

Added to this are beers whose fermentation begins with ordinary brewer’s yeast and ends with other microorganisms. This is why the ale/lager classification is a good guidepost, but a poor candidate for the final word.

FAQ – frequently asked questions

Summary

The word “ale” helps identify one of the basic families of beer. It indicates what kind of yeast and fermentation we are dealing with, but it doesn’t answer the most interesting question: what will we find in the glass? For that, we need the specific style, strain, recipe, and process management.

In my continuously developing beer compendium, you can horizontally navigate from here to lager beers or more precisely check the differences between lager and ale. Down the tree, individual styles lead: Pale Ale, IPA, bitter, porter, stout, weizen, witbier, saison, Kölsch, Altbier, Grodziskie, and more. Only their names truly begin to tell the story of taste and aroma!

Finally, I’ll just say that I envy those who are at the beginning of their journey and are just discovering the sensory richness of the beer world. Enjoy your tasting and don’t let yourselves be confined to a narrow cage!

Artur Karpiński

Not just a foodie, but also a self-taught chef who cooks and tests recipes from around the globe. A traveler and connoisseur of great dishes across countries and cultures. Certified beer sensory specialist. Owner of a contract craft brewery renowned for wild, experimental brews. A former homebrewer with deep know-how in brewing techniques and beer styles. Loves pushing flavor boundaries—both on the plate and in the glass. His motto: “Go big or go home.”