Woman drowns at Perth's Trigg Beach; family members raise alarm

A 28-year-old woman has drowned at a beach in Perth's northern suburbs.

The woman, from Clarkson, was pulled unconscious from the water at Trigg Beach on Friday afternoon.

Surf lifesavers and paramedics spent 30 to 40 minutes trying to resuscitate her before she was taken to Sir Charles Gairdner Hospital.

Surf Life Saving Western Australia spokesman Andrew Matraszek said it was unclear how the woman got into trouble.

"The sea breeze was in in the afternoon when this incident occured, so that certainly wouldn't have helped... but [there was] a small swell, sort of a 1 or 1.5-metre wave, really tragically, quite a nice beach day," he said.

"It appears that she was down at the beach with a family group and she entered the water at a very, sort of remote corner of the beach.

"One of the family members raised the alert."