Search for WA diver hampered by rain

Police searching for a diver missing off the WA coast have been hampered in their efforts by rain.

The diver was one of a group of five who were on board a vessel on Saturday about 4-5km off the Dawesville Cut, just south of Mandurah.

Police say the group raised the alarm when the diver failed to resurface.

Water Police and Mandurah Volunteer Marine Rescue (VMR) vessels are helping in the search along with a police dive team.

Two helicopters assisting in the search have had to return to base after heavy rain in the area, but police say all water-based teams are still searching.