I am starting a diving club at my high school and I was hoping i'd be able to take trips down to north carolina to do some diving. I just talked to my LDS about it today and he said that during the fall and winter months it is too cold to dive north of florida really. I thought I would get a second opinion since the person I talked to wasn't from north carolina. Is it really too cold or can you be comfortable in a 7mm during that time? I just did some diving in 55 degrees with 7mm and I was fine but I think much colder than that would get a little cold.