The further from the uk, the warmer it gets. we stopped enroute to the caribbean at the azores and it was mid 60's, and true to british style, the shorts and t.shirts were on, you'll be sunbathing on deck before you reach your first caribbean port.
your probably flying back so i wont mention the dreaded bay of biscay and the foul mid november weather we encountered on our return!!!
We did this trip on ov last november, it was as smooth as a mill pond al the way to the carribbean, we stopped in maderia enroute and the weather was fine all the way, we didnt get an ounce of rain....maybe we were very lucky, overall we enjoyed our cruise however the sea days were getting to us and we were really pleased to see land by the time we reached the caribbean........enjoy.
Many thanks,yes i too am thinking will i be putting the other half over board by the time we get there!!!ha ha am looking forward to it as its my 50th birthday so at least i can relax...read(eat).