Leading surfwear and snowboard apparel, gear and accessories maker Billabong Ltd said on Thursday its first-half net profit climbed 40 per cent to A$29 million (US$14.8m).

The company said in a statement the profit surges was thanks to strong global growth and improved margins and was "comfortable" with its previous full-year guidance.

Chief executive Matthew Perrin said: "The company has growth momentum in all major international markets with improving bottom-line margins and solid cashflow."