Ten days ago I did the 10:00 boat from PVD (M/V Aurelia). Having read about the thermocline, I was (miserably overdressed) in a 5mm wetsuit with hood.
The first dive on Juno ledge, according to my Teric, splashed at 92 and ended at 87.
The second dive on the WPB Corridor splashed at 88 and...