...news/weather web site is the most accurate at forcasting the Orlando area weather. I can tell you here in Dallas we can go to 3 different news web sites and get 3 different forcasts,but there is always one that is most accurate. Thanks-Julie
Like my mother always says about weather in FL though: If you don't like it, just wait 15 minutes because it'll change again. Or just cross the street.
(it's a bizarre thing out here--it'll be raining across the street but bone dry on your side. My parents are only a few minutes away, but it can be pouring buckets here, but nothing there. It's insane. )
Basically, just prepare for anything and everything. That way, nothing will surprise you.
Weather forecasts do change from day to day around here - checking the forecast a week before you leave and you probably have about a 50% chance of it being somewhat accurate, check it the day before and it will give you a pretty good idea, check it the hour before, and it still may be changed by the time you arrive!
Seriously though, local news station websites (like the other posters have given you) are usually more up to the minute than the Weather Channel.