The actress fell into the bathtub after she lost her balance as she was under the influence of alcohol.
Traces of alcohol were also found in her body, Gulf News reported quoting the forensic report.
The paper quoted the UAE government's forensic report on its official Twitter handle.
A copy of the forensic report, attached with the post, has a stamp of the "Ministry of Health UAE" and the director of preventive medicine, Dubai, Dr Sami Wadie.
“The investigation is still going on to determine the circumstances surrounding the accident as the forensic report only says that she drowned,” Gulf News quoted an official as saying.
Sridevi, 54, died on Saturday late night in a Dubai hotel. She had stayed back in Dubai after a family wedding.
"Following the completion of post-mortem analysis, Dubai police headquarters today stated that the death of the Indian actress Sridevi occurred due to drowning in her hotel apartment's bathtub following loss of consciousness," the Dubai government's media office said on Twitter.
"The investigation is still going on to determine the circumstances surrounding the accident as the forensic report only says that she drowned, Gulf News quoted an official as saying.