I usually go exclusively dry when the air temp drops into the 60's or lower. Even if the water is okay, you lose heat fast on the surface when the cool breeze starts hitting your wet body. I also tend to go dry if I am doing really deep dives or if the water is low 50s or colder.
If you go wet the trick is to get dry and into dry cloths as fast as you can after the dive. As long as you don't stand around outside dripping wet you should be fine here in RI up through November. The water temps here don't really drop out of the 50s until late November/early December.
Once the water hits the 40s and below it starts getting pretty uncomfortable in a wetsuit for everyone but the real polar bears. Coldest I ever did wet was 42, and I was pretty cold. That said I did a dive last winter with my buddy Jerry who dove wet in 36 degree water and he never complained once (I used a dry suit on the same dive and complained plenty! ).
If you go wet the trick is to get dry and into dry cloths as fast as you can after the dive. As long as you don't stand around outside dripping wet you should be fine here in RI up through November. The water temps here don't really drop out of the 50s until late November/early December.
Once the water hits the 40s and below it starts getting pretty uncomfortable in a wetsuit for everyone but the real polar bears. Coldest I ever did wet was 42, and I was pretty cold. That said I did a dive last winter with my buddy Jerry who dove wet in 36 degree water and he never complained once (I used a dry suit on the same dive and complained plenty! ).