Weather conditions are hampering rescuers' efforts to reach two bushwalkers stranded on Mount Anne in Tasmania's Southwest National Park.

Tasmania Police said two women, aged 22 and 23, called triple-0 about 6:20pm on Monday.

"The two women … reported being reasonably prepared with a tent, sleeping bags, emergency blanket, and food but worsening weather meant they were cold, wet and unable to continue their journey,"

search controller Callum Herbert said.

He said the rescue helicopter was unable to reach the site known as "The Notch" because of strong winds, low cloud and poor visibility.

"A search party of police and wilderness paramedics attempted to reach the area on foot overnight but the group was forced to retreat back to Memorial Hut shortly before 3am, when conditions deterior

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