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.

August at Serangan delivers consistent surf with an average swell height of 2.2m and a solid 15.0s period, indicating powerful, well-spaced waves. The swell predominantly arrives from the SSW and SW directions, with the largest waves (2-2.5m) occurring 25.20% and 16.05% of the time respectively—ideal for intermediate to advanced surfers. Smaller, more manageable waves (1.5-2m) are also frequent, particularly from the SW (12.40%). Wind conditions, however, are less favorable, with ESE and SE winds dominating at 10-30kph (over 60% combined), creating onshore or cross-shore chop that can disrupt wave quality. Light offshore winds are rare (0%), meaning clean conditions are unlikely. Overall, expect strong, consistent swell but variable wind-affected surfaces, making dawn or late sessions preferable when winds are lighter.