Early November is a variable temperature time of year. Some years it still feels like summer, others like winter has arrived. I am sure the usual is that swimmming it still a go. I have been there in early November a handful of times and only recall once where it was just so cold no one was swimming. It was one of those troughs on the nationwide weather map that depicts a dip all the way down to Florida, bringing that cold northern air down to WDW. It warmed up a little more each day as the week progressed, but we left before it had gotten warm enough for swimming again. But overall the early November weather is real nice for walking around the parks.