I made a Weis beer and my primary fermentation temp was 19C. After 2 weeks I mixed priming sugar into my beer and bottled it. I then conditioned the bottles for a week at 21C. I know when in primary the fermentation temp is critical and higher or lower temps does have an effect on the flavour of the beer at the end. Does the fermentation that happens in the bottle while bottle conditioning to carbonate the beer have the same effect?

  • What are you asking here - does bottle conditioning affect flavor? or does temperature while bottle conditioning affect flavor?
    – dax
    Oct 14, 2013 at 13:55
  • Does temperature while bottle conditioning affect flavor Oct 14, 2013 at 14:33
  • I dont have a problem with the flavor changing over time or with off flavors. the beer has a prominent banana flavor that can be a result of a too high fermentation temperature. I fermented at 19C so I dont think that the temp was too high to result a strong banana flavor. while conditioning in the bottles I kept the temp at 21C. And that is where my question comes from. Could the warmer conditioning temperature have resulted in the prominent banana flavor? Oct 14, 2013 at 19:15
  • 1
    ah, i see - add that to the original question!
    – dax
    Oct 14, 2013 at 19:16

2 Answers 2


The simple answer is yes: the yeast will actively be fermenting in your bottle, which will contribute to the flavor. However, the effect on the overall flavor will be very very small. I've read that some commercial breweries actually bottle condition with different strains of yeast, so as not to allow harvesting of their proprietary strains that do the main fermenting.

As a side note, I always pour myself a little sampler when bottling (or, most often, kegging). That way I have an idea of what the beer tasted like before the final conditioning.

  • And the banana flavor most likely came from the yeast used. It is caracteristic (and wanted) in Weiss beers. Oct 17, 2013 at 4:51

Yeah, I would say effectively "no" or at least not significantly (which isn't really different from djs' answer). Bottle conditioning is the same for various beer types, including beers that fermented at radically different temps (lager and saison, for example), so fermentation temps that have a huge impact on flavor do not carry over to bottle conditioning; that fermentation is over.

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