Sherri, I don't know where you are coming from to get to Galveston, but as I said in the other topic, just a light jacket or sweater should be fine. I get cold easily & a sweater was enough when we went last Nov. out of Galveston. It is cool but not real cold. Check here and you will know how you should dress:
http://www.weather.com/outlook/recreation/outdoors/wxcl.../USTX0499?from=searc