Hallenstein Glasson Holdings says it's finding the going tough despite its sales for the first 17 weeks of the financial year being 4.8 per cent ahead of the same period last year.
"The trading environment has remained tough in both New Zealand and Australia," chief executive Mark Goddard said in a statement.
"It is, however, not possible to reliably forecast the total summer season trading result as the December and January trading periods contribute such a large proportion of sales and profit for the season," he said.
The clothing retailer's shares fell almost 2 percent to $5.50. Sales in the first eight weeks of the year had been up 7.2 per cent, the firm said September 28.
For the first 17 weeks of the previous financial year the company reported a 15 per cent increase in sales and an improved gross margin.