Rain delayed the start of the final day of the first Test between New Zealand and South Africa on Sunday, with little prospect of any play.
At stumps on day four, South Africa were 224 for six, to lead by 191 runs.
South Africa's batting coach Neil McKenzie believed his side needs another 70 runs to feel safe.
However, rain is forecast to continue throughout the day.
The second Test starts in Wellington on Thursday.
The last time New Zealand played South Africa in Dunedin, in 2012, New Zealand needed 264 to win with eight wickets in hand when rain washed out the final day.