What is the water temperature in an underground cavern?

Question

I read that people can dive and snorkle in underwate lakes in caverns and that sounds so cool! Then I thought about and it sounds cold! What is the water temperature in an underground cavern lake? I think the one I saw was in Bermuda, if that helps.

Answer 1

Variable, but know it is COLD!  Anywhere from supercold water at about 20, to 65.  65 will chill you fast!  You can find info on NGC.com (national geographic channel.com)

Answer 2

42.

Answer 3

No guys, you are wrong.  New research suggests that it is 40.

Answer 4

i have figured out that it is definetly 41 no doubt about it. sorry i cant find the link bu i can guarentee you