I've come to the area 2 years in a row in early November and have had wonderful weather both times (maybe I was lucky but the weather was easily in the 70s). I plan to come back with friends again this year and hope I have the same weather when my friends join me.
I also came to the cottages one week between Christmas and New Years in 2004 and the weather was very nice -- high 60's to low 70s but I don't know if that could be expected. We're going to be back at the same time this year, but we'll be ready for the kids to wear bathing suits (as they did last time we were here) or heavier jackets. In either case, we'll visit the beach to build sand castles, play soccer, and read in the sun -- and we'll go to the Red Bar (but we get there early in the evening to get seats more easily).