The Sun UK reports that Adewola saw the woman fall into the river and jumped into the water alongside another man, just after midnight on April 25.
Emergency services, including coastguard and police marine units were called to the scene to help all three people who were in the water.
They rescued the woman and one of the men who jumped into the river to help her, but were unable to locate the Nigerian.
His body was found six hours later.
He was said to be on his way home from work at fine dining restaurant, The Cinnamon Club in Westminster, when he spotted the woman on the bridge.
After seeing her fall into the water, he dived in with his colleague to try and save her.
Describing what happened, his father, Michael Adewola, 63, said:
“Him and his friend were coming from work together, and they called the police, and saw what was happening. They wanted to help and tried to speak to her but wanted to leave it to the police.
“He is a hero, and always will be, I can’t bring him back but I want him to be remembered forever for what he did, it was just like him to want to always try and help others. He would help anyone that needed it. I am proud of my son, he is amazing, but as a family we are devastated. We are just glad the woman is alive too”