The temperature of the wort during fermentation. Often different from the ambient temperature since fermentation is an exothermic process (releasing heat).

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Quick fermentaion, what should i do?

I made a batch of cider 6 days ago, and it started fermenting nicely, however now the bubbles in the air lock have slowed to nearly 1/min (according to my recipe means it's fermented) However this is ...
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152 views

Is it HOT enough for ya!

How do you determine the right temp? Should everything be brewed @ the same temp or can different temps offer different drinkable results? My first try at my own recipe was steeped @ 120 degrees ...
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71 views

Temperature for wild-yeast fermented cider

I just bought 10 gallons of freshly pressed unpasteurized apple sweet cider. I am breaking it into two batches, planning to ferment one of them with french wine yeast and the second one will be ...
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69 views

Why is the primary stage of fermentation of wine important?

Senior chemistry student, whilst I know the main reason, I would like to know more of the chemistry behind it.
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198 views

A side by side comparison of open vessel vs closed vessel natural temp rise during fermentation

Would an unjacketed open fermentor, ferment cooler than an unjacketed closed system, given everything else equal. The idea being the ease of releasing strain and pressure on the yeast in an open ...
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107 views

my temperature is too high what can i do?

i have just added all the ingredients for my first coopers lager beer kit. I am aware that my temperature is too high at 32degreesc and the kit says to be from 21-27. will this ruin it? i heard it was ...
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155 views

Lambic fermentation/aging temperature

I am anxious to start a batch of lambic, but have some reservations timing wise about the temperature in my basement currently. My basement goes from around 45 in winter (now) to 60-65 at the end of ...
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113 views

Will a yeast that ferments at higher temps stop fusels?

I have trouble with controlling temps and do not have much room for my growing collection of fermentation bins but I'm trying the swamp cooler for my 5L DemiJohn white wine kit. I'm gonna get some new ...
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57 views

What consequences arise from holding wort at a high temperaure after fermenation is 100% complete?

I just learned recently via this forum that temperature is most important during primary fermentation, which completes in (roughly) 7 days. I have fermwraps on my carboys. What would happen if I set ...
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954 views

Irish Ale Yeast - Strain Selection, Fermentation Temps, and Re-using Yeast

I am brewing an Irish Red Ale, followed by a Dry Irish Stout, both this week, and then I need to re-use that yeast within the following two to three weeks for an ESB (1.053 OG recipe was picked by a ...
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354 views

How Much (and How Fast) of a Drop in Temperature can (Ale) Yeast Tolerate? (And Preliminary Results from My Experiment)

I have rigged up a Raspberry Pi with some DS18B20 temperature probes that measure both the water in the swamp cooler and the beer directly and store the results in a MySQL database. I brewed a new ...
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3k views

Can Dried yeast function at a low temperature?

I started my first batch of home brew lager around 24hrs ago I aerarted it and it was at 20 Degrees celcius but does not appear to be fermenting..... I know people say I have to give it time as I read ...
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452 views

When is the most critical time to control fermentation temperature?

I know there is a similar question out there, but I am trying to ask for my own particular set u. If memory serves, I believe that is is in the first 48-72 hours of pitching yeast. This is when ...
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1k views

WLP 566 Saison Long Fermentation

I brewed up a saison/BGSA 13 days ago, OG of 1.088. Don't have the grain bill/fermentables handy, but there was a good bit of sugar/highly fermentable adjuncts. Pitched a 32oz starter with this ...
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525 views

Stuck Ferm? Celebration Ale Clone Gravity at 1.021

Celebration Ale Clone (extract kit) White Labs California Ale Yeast (liquid vial, no starter, I know next time I'll make a starter) Pitched at 68 degrees and good activity 18 hours later, got up to 71 ...
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25 views

Is there a benefit in rising fermentation temperature for dark ales?

I am making a porter, and just started fermentation a couple of days ago. I have never manipulated temperature before, but have read that this is vital when making pilsners, so got curious. Is there ...
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96 views

Is anyone aware of a mini refrigerator model with a flat bottom for use as fermentation chamber?

Searching like crazy to find a mini refrigerator with a flat bottom. Any model will work, as I am new to this and only brewing 1 gallon batches. Ideally it would hold a 5gal carboy so that I do not ...
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23 views

What are the characteristics of a fusely beer? [duplicate]

I have heard that too warm a fermentation createds "fusely" beer. What are they and how can I tell if I have this problem?
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262 views

DIY BrewBug based offerings?

BrewBug, is a neat little toy that essentially has a "floating bob" that measures the temperature and specific gravity of the wort as it is fermenting, allowing for niceties like changing the ...
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129 views

Which temperature do I ferment at: the recipe's temp or the yeast's recommended temp?

So, I'm trying to brew a Mexican lager today. What I've done is taken Palmer's Cold But Not Baroque recipe and tweaked it a bit. However, instead of using Bohemian lager yeast, as the recipe calls ...
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1answer
82 views

Temperature of Wort hit 89*F when yeast has maximum temperature of 72*

... I rigged up a raspberry pi and connected it to a thermwrap to regulate temperatures for my wort. All was working swell until I made a slight tweak in the code, and commented out the section that ...
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1answer
62 views

Heating after fermentation?

What's the general consensus on leaving a heat source turned on after fermentation has complete? I'm doing an Imperial IPA which should finish fermenting in 4-5 days going by previous experience with ...
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1answer
74 views

Fermentation Temperature

I have a quick question. I've been looking for an answer, but didn't find a clear answer. So, I'm making an IPA. Right now the air temperature in my closet where I keep the carboy is 67-68F. This is ...
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144 views

Why every brew has a bitter malty aftertaste?

Every of 5 previous brews (lager, pilsner, pale ale, IPA) have had a somewhat bitter and malty aftertaste to them. It's not too off-putting (except the lager) but is clearly there, yet not present on ...
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78 views

Temperature of wort hit 50*F when yeast has a minimum temperature of 60*F

This is unrelated to the question I just posted here. (Yes I'm having a bad day regarding temperatures, both too hot and too cold!) My yeast had a temperature range of 60-72*F. It has been brewing ...
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738 views

Waiting to pitch yeast?

I came across a couple similar questions, but not exactly what I was looking for. I only have a short period where I have time to brew, but my starter isn't ready and some cooling equipment. Are ...
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70 views

Help! Started my lager at 16degs C for 3 days (instead of 14C) - ESTERS!

Good day! Brewing a Czech pilsner OG 1.046 (brought it down from 1.056) Yeast: Wyeast 2278 (1 litre starter) - 10-14 degs range 22L batch My temperature control on my fridge said 14degs but a ...
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61 views

Optimum Fermentation Temperature

I am planning on brewing a wheat beer with Danstar Munich Wheat Beer Dry Yeast. I didn't realize until I had already made the purchase that the optimum temperature for fermentation was 55-65. I don't ...
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204 views

WLP036 (Düsseldorf Alt) and cool temperatures

I am fermenting an alt in my cellar using WLP036 (Düsseldorf Alt). Pitched a 2 litre starter into 21 litre 1.051 wort. Fermentation was extremely vigorous at 16 C ambient temperature for 36 hours, ...
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1k views

Beer fermenting too cold?

My first brew is currently fermenting on its 6th day. I just checked the temperature and it was quite a bit lower than what I initially thought. The temperature in the room is 12'C (54'F) and the brew ...
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28 views

Is there a way to estimate the actual temperature where the yeast ferments without having a sensor inside the carboy? [duplicate]

I was reading an article on fermentation temperature control where it says, However, since yeast growth and fermentations are exothermic and therefore generate heat, figure that the temperature ...
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362 views

Change the temperature from fermentation to aging?

I used to allow for primary fermentation, then rack the beer out of the primary fermentor and than let it 'age' in secondary for about 2 weeks. At that point I used to move the beer from room temp ...