Temp on fermentation - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Temp on fermentation

Thread Tools
Old 11-16-2012, 04:13 PM   #1
Nov 2012
Posts: 4

This is my second ipa. My first batch I put my yeast in when the wort was too hot killed it. I wanna be more carful about temp on this guy. It's been about a day now and is at 78 degrees it went up since yesterday. I put the yeast in at 74 degrees. Am I ok? Shall I cool it down?

Reply With Quote
Old 11-16-2012, 04:28 PM   #2
WoodlandBrew's Avatar
Oct 2012
Malden, MA
Posts: 2,191
Liked 244 Times on 199 Posts

Ideally, yes you want to cool it down, but it is okay where it is. If you can, you'll want to get that temperature into the mid sixties as soon as possible. If the yeast is hot during the early stages of fermentation you will likely have fusel alcohols and other off flavors.

See the swamp cooler here:

When you pitch the yeast, you want to minimize the amount of time that the wort is without yeast to lower the chance of infection, but you also don't want to pitch when it is too hot. It's a slippery slope. If you cover the wort after the boil is done, and don't open it until you dump it into the fermenter and pitch the yeast, then you can stretch the time line to about 24 hours. Even longer if you can get the air out of the container. Search for information on the no-chill method.
The 2nd edition is now available: Brewing Engineering
Woodland Brewing Research Blog Applied Science for Better Beer.

Reply With Quote
Old 11-16-2012, 04:35 PM   #3
Sep 2012
Silver Spring, MD
Posts: 636
Liked 123 Times on 88 Posts

Not sure--did you already pitch your yeast or not? If you pitched at 74F you should be fine as far as not killing the yeast. However, depending on the strain you used, you may still want to cool it down, since many yeasts ferment best in the mid-to-high 60's. If you ferment at a higher temp than the yeasts prefer, they'll get stressed and produce off-flavors in the beer. It probably won't ruin it, but you can get a cleaner, better tasting beer by keeping your temps lower. Check on the yeast maker's website, they post optimal temp ranges for all of their individual yeast strains.


Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fermentation Temps - Room Temp vs: Internal Bucket Temp mccumath General Techniques 7 09-02-2013 06:15 AM
Fermenting temp: Fermentation chamber temp or sticket therm on carboy? cutchemist42 Fermentation & Yeast 1 10-03-2012 05:29 AM
Ambient temp vs. beer temp during fermentation dandw12786 Beginners Beer Brewing Forum 5 12-09-2010 03:07 AM
carbonation calculator: fermentation temp, cold crash temp, bottling temp? jigidyjim Beginners Beer Brewing Forum 8 11-27-2010 01:04 AM
Ideal ambient temp for lager fermentation temp? tinydancer Beginners Beer Brewing Forum 2 06-30-2008 03:54 PM

Forum Jump