EBITDA is estimated at $120m, excluding the impact of IFRS 16, recent IFRIC interpretations, and one-off non-cash items.
The impact of the New South Wales and recent Victorian lockdowns is estimated to be $13m on EBITDA.
Rip Curl, which was acquired by Kathmandu in 2019, continues to trade strongly in North America and Europe, the NZX statement said.
Despite Covid-19-related disruptions, direct-to-consumer sales remain well above pre-Covid levels and wholesale orders received for FY22 continue to show double-digit growth over FY19.
Footwear brand Oboz has seen record sales performance in the second half of FY21.
Newly appointed group chief executive Michael Daly said Kathmandu had had a positive start to winter, which was a key trading period.
"Covid-19 continues to be a disrupting factor, in particular for Australasia during the key trading period for Kathmandu.
"Excluding these impacts, Kathmandu had a solid start to the winter season, and Rip Curl sales momentum continues. Trading conditions in the Northern Hemisphere for both Rip Curl and Oboz are particularly strong across our online, retail and wholesale channels, as our Group benefits from a diversified mix of channel and geographies."
Kathmandu resumed its dividend payment for its shareholders after announcing the group increased sales almost 12.9 per cent in the first half of 2021 to $410.7m.
EBITDA for the six months to December 31 was up 19 per cent to $48.2m, while the company posted a net profit after tax of $22.3m - up 194 per cent on the same time last year.