Natural Wonders Scuba Diving A Brisk Morning Scuba Dive Between Tectonic Plates By True Adventure Stories on May 16, 2017September 21, 2017 When the air temperature is 33°F and the water temperature is 35°F, you may as well go swimming… Posted in: cold, Europe, fissure, freezing, geology, glacier, ice age, iceland, scuba, Scuba Diving, silfra, tectonic plates, thingvellir, underwater photography 2 comments