Serangan - surf spot statistics

Serangan, Indonesia, offers consistent surf year-round, primarily fueled by ground swells, which dominate from January through December, rarely dropping below 92%. The best months for surfers are during the dry season, particularly from June to September, when swell sizes peak, averaging 2.0–2.2 meters. These months have nearly 100% ground swell contribution, ensuring clean, powerful waves, but they come with a trade-off: wind conditions are predominantly unfavorable (98–100% bad winds), often blowing onshore due to monsoon influences. For those prioritizing wind conditions over size, January and February provide more favorable winds (54–57% good wind days) while still maintaining solid 1.6-meter swells and a high ground swell presence (92%). March and December also offer decent wind conditions (46% and 47% good winds, respectively), but the swell size is slightly smaller (1.5 meters). April and November transition into worse wind conditions (82% and 78% bad winds), though ground swells remain strong. The least desirable months for surfing are May through October, when wind conditions are almost entirely unfavorable (97–100% bad winds), despite the larger swells. Advanced surfers may still find opportunities in these bigger but choppier conditions, but for most, the sweet spot is early in the year when winds and swells align better.

October at Serangan offers solid surf conditions with consistent swell energy. The average swell height is 1.8m, paired with a strong 14.2s period, indicating powerful, well-spaced waves. The majority of swell comes from the SSW (69.3% of waves between 1-2.5m) and SW (34.8% in the same range), delivering clean, organized lines—ideal for intermediate to advanced surfers. Only about 7% of wind conditions are optimal (light offshore or cross-offshore), with SE and ESE winds dominating (over 50% of the time). These are often moderate to strong (10-30kph), which can create choppier conditions, especially in afternoon sessions. Expect peaky, punchy waves when the wind aligns, but be prepared for some texture when onshore flow picks up. The lack of significant swell from other directions ensures consistency, though larger sets (2-2.5m) appear 22.9% of the time, offering more challenging rides. Early mornings or rare windless days will provide the cleanest faces. For context, while the spot handles wind due to its exposure, surfers should prioritize dawn patrols or watch for lighter wind windows to score the best waves. The swell quality and energy make it a reliable pick for October, though patience with wind conditions may be needed.