The mission to recover a body found in a crevasse on Fox Glacier this morning has been postponed.
Sergeant Mathew Tailby said while police have arrived at Fox to undertake the recovery, the clounds have closed in, making it unsafe to fly to the glacier.
"We will now continue to reassess the weather over the next few days, but it is not believed conditions will be suitable to access the Glacier site before Monday," he said.
Police received a call from a tramper who had discovered the body at around 10:30am.
The body is believed to have been there for some time. Police say they will be reviewing files of people missing in that area going further than 30 years.
Once the body is recovered, police will work to establish the identity of the person and notify next of kin.
Recovery operations have been undergone on Fox Glacier in the past.
In November 2015, a sightseeing helicopter operated by Alpine Adventures crashed, and all seven people on board died. Those bodies were recovered in the weeks following the crash.
The bodies of an Australian couple were also the cause of a recovery mission after they fell, roped together, more than 700m down a steep cliff face in the Aoraki/Mt Cook National Park in December 2015.
About 600,000 people visit New Zealand's two main glaciers, Fox Glacier and Franz Josef, every year.