As an expert sommelier and brewer, I can assure you that cider does not go bad if it gets warm. Unlike other alcohols, such as wine and beer, cider is a hardy product that can tolerate swings in temperature without spoiling. In fact, cider is meant to be enjoyed more at room temperature, rather than ice cold.
Cider is made from fermented apple juice, which undergoes a natural process of fermentation. During this process, yeast consumes the sugars in the apple juice and converts them into alcohol. This fermentation not only creates the pleasant alcoholic taste of cider but also acts as a natural preservative.
Due to its fermentation process, cider is more resistant to spoilage than other beverages. It can withstand changes in temperature, light exposure, and time better than wine or beer. This is partly because cider typically has a higher alcohol content than most beers, which helps to inhibit the growth of spoilage-causing bacteria.
While it is true that excessive heat can have some negative effects on the flavor and quality of cider, it is unlikely to render it undrinkable or “bad.” Extended exposure to high temperatures can potentially accelerate the aging process of cider, leading to a loss of freshness and a change in taste. However, this is a gradual process, and it would generally take extreme conditions or prolonged exposure to significantly affect the cider's quality.
In my personal experience, I have enjoyed cider that has been inadvertently left in warm temperatures for a short period of time without any noticeable negative effects. Of course, it is always best to store cider in a cool, dark place to preserve its optimal flavor and quality. However, if you find yourself in a situation where your cider has been exposed to warmth, there's no need to worry too much.
To summarize, cider is a hardy beverage that can tolerate changes in temperature without going bad. While prolonged exposure to heat may affect its flavor and freshness over time, it is unlikely to render the cider undrinkable. So go ahead and enjoy your cider at room temperature or slightly chilled, without fear of it going bad.