ginti
Contributor
Water temp is usually around 20-25C(Adriatic Sea) and that suggests 5mm but i dived in 7mm Seac so far and i was very happy with it. I would rather be somewhat hot and let the cold water if needed:
Wait, location Miami, but you dive in the Adriatic sea? It's a long journey every time
I am in Sicily now, water temp around 28°C on the surface, but there is a noticeable thermocline at about 25m and temperature goes to 18°C... so I would test the suit at depth if I were you.
Consider that 7mm is going to be more comfortable in winter if you plan to dive the cold months.