Councils responsible for coastal erosion should unite to better tackle the issue that is putting some of Perth's best beaches at risk of closure, according to a leading West Australian coastal erosion expert.

Coastal erosion has plagued the WA coastline from South West to the Coral Coast and now, one of Perth's most popular swimming beaches Mettam's Pool is the latest in the spotlight with the dunes falling into the sea and the coastline edging back towards West Coast Drive.

Stairs to a beach near Mettams Pool at North Beach are in danger of collapsing, with the council now getting involved.

The City of Stirling is seeking residents' feedback at a community forum on July 6 before charting a course of action that could include relocating structures, sand placement, coastal walls or alternative beach spaces.

But Mick O'Leary, a lecturer in climate geoscience at UWA, believes councils should take a proactive approach to preserve the integrity of our beaches or risk the permanent closure of some of our most populated swimming spots due to the issues.