A distressed relative of the missing woman was seen being led away from the beach in the late afternoon after waiting for hours for news of their loved one.
Altona Pier, in Melbournes west, is a drawcard for locals in the warmer months. It is a popular spot for fishing and swimming and is occasionally used by recreational boats.
Relatives of missing snorkeller.Credit:Chris Hopkins
The search and rescue operation comes just days after Victoria recorded its deadliest period for drownings on record. Forty-two people have drowned since July last year, including seven in the past month. The death toll is well above the states five-year average.
Earlier this month, a 58-year-old man died near Angelsea after his boat overturned. The same a day, a man was pulled from the water near Barwon Heads but died at the scene.