Sunset over Avalon Beach and headland viewed from St.Michael's cave at the South end of the beach.

Sunset over Avalon Beach and headland viewed from St.Michael's cave at the South end of the beach.

 Panoramic photograph of a storm cell approaching Avalon Beach on Sydney's northern beaches.

Panoramic photograph of a storm cell approaching Avalon Beach on Sydney's northern beaches.

 Under-over photograph of a wave under Barrenjoey Headland at Palm Beach.

Under-over photograph of a wave under Barrenjoey Headland at Palm Beach.

 A Surf Life Saving vehicle drives along the Whale Beach tide-lines.

A Surf Life Saving vehicle drives along the Whale Beach tide-lines.

 Barrenjoey Headland viewed from 5000ft looking South down the peninsula with Pittwater to the right and Palm Beach, Whale Beach and Avalon Beach on the ocean side.

Barrenjoey Headland viewed from 5000ft looking South down the peninsula with Pittwater to the right and Palm Beach, Whale Beach and Avalon Beach on the ocean side.

 Silhouette of a surfer riding a wave at Little Avalon.

Silhouette of a surfer riding a wave at Little Avalon.

 Silhouette of two surfers on the edge of Avalon Beach ocean pool at dusk. The pool is a popular spot for surfers to "rock-off" and avoid the tiresome paddle to the line-up.

Silhouette of two surfers on the edge of Avalon Beach ocean pool at dusk. The pool is a popular spot for surfers to "rock-off" and avoid the tiresome paddle to the line-up.

 Startrails above Avalon Beach headland photographed from St.Michael's cave at the South end of the beach.

Startrails above Avalon Beach headland photographed from St.Michael's cave at the South end of the beach.