During the spring we get warm waters and very little rain, and nights can get a little bit cool. The summer in Cozumel is very hot, and sometimes you will get some heavy rains in the afternoon after the warm day. The water is warm and very clear and the sun will go down around 8 or even 9 PM. The Fall season is when we are most likely to get some tropical storms, but when that does not occur the days are usually warm and sunny. In Winter (November, December and January) is the time of the year where the coolest days are found, BUT REMEMBER THAT A VERY COLD DAY FOR US AVERAGES 54 °F