Christine Russell (R), the wife of Greenpeace crew member Colin Russell, before departing Australia with her daughter Madeleine (back L) for St. Petersburg, Russia

Christine Russell with her daughter Madeleine on Thursday. Photo: AFP

Greenpeace activist Colin Russell has been granted bail in Russia. 

Mr Russell was the last member of the Arctic 30 still behind bars in Russia. He has been in custody since a Greenpeace protest on September 18, when he climbed the first Russian-owned oil rig to be constructed in the Arctic circle, and appeared in court again on Thursday night.

His wife, Christine Russell, left Sydney for St Petersburg on Thursday morning. 

Greenpeace International activist Colin Russell of Australia stands in a cage during a court hearing to consider the request to extend the detention of 30 members of the Arctic Sunrise Greenpeace International ship in St. Petersburg, Russia, Monday, Nov. 18, 2013.

Colin Russell in a cage in court in St Petersburg during a bail application on November 18. Photo: AP

"I'm not coming home without him," she said as she left, adding she was worried about her husband's fate.

"We are still very anxious, awaiting this outcome of Colin's appeal hearing," she said. "We just hope that it's going to be a positive."

Mr Russell has only been able to contact his family twice since his arrest.

Mr Russell's 29 activist crewmates were released after Greenpeace lodged 2 million roubles ($66,347) in bail per person. They remain in St Petersburg as their bail conditions do not allow them to the leave the country.

The Australian, who has had his detention extended to February 24, was denied bail on November 18, but Greenpeace was hopeful that his appeal would be successful, chief executive David Ritter said before the court appearance.

"It's now almost three months since 30 brave men and women sailed to the far north of the world in order to highlight the crazy activities of the Russian giant Gazprom," he said.

Mr Ritter said there was no known way of cleaning up an oil spill in the Arctic Ocean, while increased oil production was only serving to "drive climate change faster and harder".

If found guilty of hooliganism, Mr Russell and his Arctic Sunrise shipmates could face seven years' imprisonment.