We were there this past Feb 5-19, not exactly the same time, but pretty close. You can expect anything for weather. We were extremely lucky and had sunny warm weather most of the time. The temps were cool at night, but high 70's and low 80's in the day. We had one day where we wore pants and a long sleeved shirt only, and only an hour of rain early one morning on another. But, you could get cool weather the whole time too! We swam several times. Now, IMHO, it is all about your perspective too. In Feb there's lots of snow on the ground where I live and it is mighty cold. To me anything without a heavy coat is a bonus. You can usually tell the Canadians because we'll be the only ones in shorts is the joke! You should bring clothes for both warm and cool weather, and wear layers since it does warm up pretty quick. The crowds were light to moderate when we were there. Presidents Day weekend was our last one, and the crowds picked up a lot close to then. I am sure someone else can give you more info about later in the month.