macado:Northeastwrecks,
I may try to dive next week in Gloucester with Easy Diver if I can get the chance. Should I just wear all 3 layers until I get something thicker or should I buy something else before I go? Seems like I should be fairly warm with 13mm on me but then again I haven't tested this theory yet.
That depends on what you are doing. Relatively shallow and short shoudn't be a major issue. At best, you'll save some money by not having to purchase a new suit. At worst, you'll need to call the dive early, in which case you'll know that your next purchase is justified.