[SDCBeeks] Harvesting Honey

I have two top bar hives that are two years old. Last week I harvested a little honey from one, and noted that there were two frames with lots of nectar. I checked today both frames are full, but no capped honey. How late in the summer can I reasonable harvest honey in Santa Fe? I am hoping that in two to three weeks at least one of the frames will be capped. Thanks, Hugh