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Old 01-07-2011, 01:58 PM   #1
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Default Could a sudden drop of 5-6 degrees cause my ale yeast to go dormant and not finish?

Was fermenting 70-71 when we had a cold snap and brought my wort temp down to around 66/67 on the 3rd day. Back up to 70 the day after. Could that have made my yeast go dormant and not finish my beer as expected?


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Old 01-07-2011, 01:59 PM   #2
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What makes you think your yeast went dormant and your beer didn't finish fermenting?


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Old 01-07-2011, 02:07 PM   #3
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What makes you think your yeast went dormant and your beer didn't finish fermenting?
FG is 1.028 after 6 days. About 53% attenuation
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Old 01-07-2011, 02:10 PM   #4
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Revvy makes a good point - the beer might be done already. You gotta take a gravity reading to know).

But also to answer your question, it's possible. Just don't get worried and think this is the difference between a syrup beer and a good beer... the difference would probably just be a couple gravity points.
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Old 01-07-2011, 02:12 PM   #5
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No, it's not the temp. That's not a huge drop....Ale yeast doesn't go dormant til the low to mid 50's.

And if it's only been fermenting for 6 days, I'm thinking there's anything wrong, it's just doing what it needs to do. Yeast don't really follow instructions all that well...being that they can't read they don't know that we humans think it takes them a week to ferment.
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Old 01-07-2011, 02:17 PM   #6
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My brewing friend says to add a packet of Nottingham dry yeast. Do you think thats a good idea or just let it sit. I have no problem letting it sit.
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Old 01-07-2011, 02:21 PM   #7
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I don't think there's any reason to "fix something" by adding more yeast when quite frankly I don't think there's anything wrong....It's only been going 6 days....I don't even begin looking at my beer's gravitys til it's been 10-12 days. And since I tend to walk away for a month normally I rarely even do that.
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Old 01-07-2011, 02:26 PM   #8
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I don't think there's any reason to "fix something" by adding more yeast when quite frankly I don't think there's anything wrong....It's only been going 6 days....I don't even begin looking at my beer's gravitys til it's been 10-12 days. And since I tend to walk away for a month normally I rarely even do that.
I was leaning that way. My brewing mentor is old school(1994-present) and still uses a secondary/dry yeast.... blah blah.
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Old 01-07-2011, 02:45 PM   #9
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A 1 degree temp movement is enough to change the mood of yeast. However, in that temp range I do not see any reason for them to go dorment. They have merely slowed down. Possibly they are in shock but should recover in a few days. If not let us know.

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Old 01-07-2011, 02:49 PM   #10
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i usually ferment in the low 60's.

just had a porter take all of two weeks to hit terminal.


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