https://www.seasidecarouselmall.com Website states open rain or shine with no mention of off-season changes. I'd call.
They are closed Thanksgiving and Christmas. Otherwise, for October, November and December, 10a till 8p Monday to Friday and 9a till 9p on Saturday and Sunday. Don't worry, there is so much to do around Seaside. And the hours don't change much during the rest of the year. Basically, if you plan on 10a to 8p, you will be in the window of operation year round.
Thanks! Your answer is awaiting moderation.