The site's I've looked at give it around 74deg so that's nice. Not too hot and partly cloudy isn't too bad. I would imagine you can sit and sunbathe without being overly hot

October is normally fairly busy, without being crowded. However, this year in September things were already starting to slow down, see here...
http://www.holidaytruths.co.uk/viewtopic.php?f=22&t=139284

The weather, when it's good, is very pleasant. Shorts & T-shirt during the day, light sweater or jacket in the evening because it gets cool after dark. It can be changeable with rainy days, pot luck.