Cpl Nowak, 27, who lived in Liverpool, was described as an outgoing and gregarious individual who would be remembered for his keen sense of humour.
Lieutenant Colonel Haydn White, Commanding Officer of 539 Assault Squadron Royal Marines said: "It is with enormous sadness that we hear of the death of Corporal Ben Nowak.
"He brought from 45 Commando Royal Marines the highest levels of professionalism, physical fitness and enthusiasm and he had an immediate and lasting impact on all those he served with.
It really brings it home when it is one of your own. R.I.P