Hi Bob,
My husband and I have been to AC in mid - end November the past 2 years, and the weather has been fantastic. The first year, dives were cancelled one day out of the 10 we were there. Last year, each day was amazing.
I HIGHLY suggest taking one of the day-long dives trips to the atolls. I also recommend diving with Amigos Del Mar. WONDERFUL crew.
We're returning to AC from 11/18 - 12/2. Hopefully we'll meet you on some dives! If you see a tall gray Brit with a short blonde American - that's us!
~Sue
P.S. Feel free to check out the dive pictures my husband took in November in the Trip Reports area of the site.