The death of a Parafield Gardens woman whose body was found on Glenelg Beach in Adelaide is not believed to be suspicious, police say.

Police today identified the 42-year-old woman after a passerby reported finding her body near rocks at the beach about 6:00am.

Police said it appeared to have been there for some time, but there were "no obvious signs of trauma".

Sturt detectives and crime scene investigators attended the scene.

Police spokesman Senior Constable Matt Brown earlier said investigations would determine "if the death is suspicious, self-inflicted or through natural causes".

The death was declared not suspicious following a post-mortem examination.

A report is being prepared for the coroner.