My OW dives were on our (Canadian)long weekend in May. The Saturday we did two dives - 1st was 35 min, 2nd was 30. Water was 42 degs, air temp in high 40's - not ideal conditions. I think we were in about 20', and two of the guys almost sucked thier tanks dry! We had to stand around outside jumping around to keepwarm for about 40mins for SI. Some in our group were cold, I was stoked just to be in something other than the pool!. Sunday was a different dive site, 1st dive was 40 mins, 2nd was 30 min, water temp of 44 degs, but a beautiful day, sunny, no wind (60 deg's +) - would have gone for a 3rd if we had any more tanks! OW BT = 2hrs, 15 min. Everyone in my group (6 of us) performed our "tricks" and did well. Sad to say though, I am the only one of the 6 that has dove since.......