It is a total mixed bag. You could have daytime highs in the low 80's or you could get hit with some daytime temps of high 50's to the low 60's. If you are there over 7 to 10 days you should have at least 4 to 6 days of possible swimming. The key is to make sure that the resort has a heated pool. Folks who live in the south generally find it too cool to swim there even with temps in the 70's. I was raised in the south and am stranded in the north (sort of, southern Ohio) but we always swim when the weather permits. The key is if it is warm enough on a given day, swim on that day, don't count on the weather staying that warm the entire trip. On a positive note, February is a fairly dry month in Orlando.