Prepare for anything. Our experience with February (early in the month) was great - high 60's/low 70's during the day, a bit chillier in the evenings. I have found it too chilly for swimming with those temps, but of course it could be warmer. I would suggest you pay particular attention to Orlando weather two weeks or so before your trip. I make a point to check the websites of the local Orlando news stations such as WFTV or WESH. We're heading to Bay Lake Towers in late February, so we'll be doing the same!