I wouldn't worry too much. My bermuda is starting to brown just a little as well and my guess is it's because the days are getting shorter and the temps are dropping at night.

Are you watering at all? What about fertilizer? Should be doing that every month.Some of the problem is the lowering of the mower. You won't see dormat conditions until the first frost and you are far from that at upper 60's.

@ neilaz. I watered some last week and it's even rained since then so I haven't watered anymore. I pretty much have stopped fertilizing. I believe the Bermuda Bible says not to fertilize within 6 weeks of the first frost. I'm pretty sure I am within that time range.

The lowering of the lawnmower may have been a big contributor because it is trying to green just a bit. Besides that, I cannot stress how strange this summer has been weather wise.

Low 50's in the past few nights...

Could be what happened is this. Earlier in the summer when it was raining all the time, any deep roots you may have had rotted away. The bermuda regrew new roots which did not have to go as deep looking for water. Now you are left with short roots which are much more susceptible to dry conditions.

You did not mention if you kept up with monthly fertilizer, but if not, that might have contributed to the issue. Couple all this with scalping it down and I think you could expect something like that.

It is bermuda. It will return.

Also let me add that I lowered my lawn mower just a bit the last few cuts.

There is your answer, you scalped it. At this time of year in transition zones you raise the cutting height in fall, not lower it.

But do not worry as it is only cosmetic and really doe snot hurt the grass. If you have not applied fertilizer in the last month, or are pretty sure your first frost is at least 30 days out, apply fertilizer, water it in real good, and raise the cutting height.