- Krishnam Raju Gadiraju
- 53.86 second(s)
- India (Bangalore)
The fastest time to complete 2 Rubik's cubes simultaneously underwater is 53.86 seconds and was achieved by Krishnam Raju Gadiraju (India) in Bangalore, India, on 19 October 2017.
For the attempt to be valid the challenger must be fully submerged underwater.