Ataka - surf spot statistics

Ataka, Japan, is primarily a windswell-dominated surf spot, with ground swells playing a minimal role throughout the year. The best months for surfers are typically during the winter season, from November to February, when swell activity is highest and wave size is most consistent. November stands out with 90% wind swell and 2% ground swell, along with slightly better wind conditions (22% good winds) compared to other months, making it a solid choice. December and January also offer strong conditions, with mean swell sizes reaching 2.0m and 2.1m respectively, though wind conditions are less favorable (only 17-19% good winds). February follows closely with a 1.8m mean swell size, maintaining decent surf potential despite similar wind challenges. Outside winter, surf quality drops significantly: from March to October, wave size diminishes (1.3m in March down to 0.5m in June/July), and wind conditions remain poor (over 80% bad winds). Swell consistency also weakens, with increasing no-swell days, particularly from May to September. For experienced surfers seeking the best balance of swell and wind, November is the top pick, while December through February provide the most reliable waves, though with tougher wind conditions. The rest of the year is generally subpar, with small, inconsistent swells and unfavorable winds.

December in Ataka, Japan, offers decent surf conditions with an average swell height of 2.0m and a solid period of 7.9s, indicating well-defined and powerful waves. The dominant swell directions are NNW, NW, and WNW, which collectively produce the majority of rideable waves—especially in the 1.5-2.5m range. These swells are clean and consistent, making them ideal for intermediate to advanced surfers. Wind conditions are less favorable, with only 19% of days offering ideal offshore or light cross-shore winds (typically from the N to NE sectors). Stronger onshore winds (W to SSW) are more common, which can create choppy conditions, particularly when paired with larger swells. The best sessions will likely occur when NNW/NW swells coincide with light northerly winds, providing cleaner faces. While bigger days (over 2.5m) are less frequent, they do occur, offering powerful, heavier waves for experienced riders. Overall, December delivers a mix of quality surf, but wind luck plays a key role in scoring good sessions.