The price for strong crossbred 39-micron wool rose to $5.15 a kilogram, from a 17-month low of $4.95/kg at last week's North Island auction and compared with $5.20/kg at the last South Island auction two weeks ago.
The latest price is 6 per cent below the five-year average and 14 per cent weaker than year earlier levels.
"Most of the bales passed in the auction were reportedly from poorer quality merino and mid-microns," AgriHQ's Lee said.
"While finer merino fleece traded at a premium on the last South Island auction, coarser end ones traded at a discount."
At the auction, 18-micron merino fleece rose to $16.20/kg from $16/kg at the comparable South Island auction two weeks ago, while 21-microns slipped to $13.70/kg from $13.20/kg.
Wool is New Zealand's 16th largest commodity export, according to the latest trade data, which showed the value of wool sold overseas fell 11 per cent in the year through July to $732 million.