Karmøy, Norway, is a surf spot heavily influenced by wind swells, with ground swells playing a secondary role. The best months for surfing here are from late autumn to early spring, specifically October through March, when swell activity is more consistent and wave heights are larger. During these months, the mean swell size ranges between 1.3m and 1.6m, with wind swells dominating (66-72% of the time). However, wind conditions are generally poor, with good winds occurring only 9-11% of the time, meaning offshore or cross-shore winds are rare. The worst conditions are from May to August, when swell size drops significantly (0.7-0.8m), and ground swell contribution is minimal (3-9%). Summer months also see higher frequencies of no swell (35-42%), making surfing unreliable. While winter offers bigger waves, surfers must contend with strong onshore winds and challenging conditions, requiring experience and proper gear. For the most surfable conditions, target October-November and February-March, when swell size and frequency are decent, though wind quality remains a limiting factor. Overall, Karmøy is a spot for committed surfers who can handle less-than-ideal winds and colder temperatures in exchange for consistent waves.