Belongas Bay - surf spot statistics

Belongas Bay in Indonesia is a consistent year-round surf spot with dominant ground swell, making it highly reliable for wave riders. The swell is almost always present, with ground swell percentages ranging from 91% in January to an impressive 100% in September, ensuring minimal flat spells. The mean swell size varies between 1.4m and 1.9m, peaking from June to September, when waves are largest and most powerful, ideal for experienced surfers. However, wind conditions present a significant seasonal challenge. Offshore winds, crucial for clean waves, are rare during most of the year, particularly from May to October, when bad wind conditions exceed 90%. The best months for surfing in Belongas Bay are February and March, when wind conditions are more favorable (42% and 35% good wind days, respectively), and the swell remains solid at 1.5m and 1.4m. Despite the strong presence of ground swells in the second half of the year, persistent onshore winds make these months less ideal unless you're willing to tolerate choppier conditions. If wind is less of a concern and you prioritize swell consistency and size, June to August deliver the biggest waves, but expect challenging winds. For a balanced mix of decent swell and relatively better winds, February offers the best compromise. For advanced surfers seeking powerful waves, the mid-year months provide the best challenge, while those looking for cleaner conditions should target early in the year. November and December mark a slight dip in swell size, but wind conditions remain poor, making them less optimal. Overall, Belongas Bay is a high-consistency surf spot with trade-offs between wave size and wind quality—optimal surfing depends on whether you prioritize swell power or cleaner conditions.

October in Belongas Bay delivers solid surf conditions with a dominant swell from the SSW and SW directions, making it a prime time for experienced surfers. The average swell height is 1.7m with a strong 14.2s period, ensuring well-spaced, powerful waves. The majority of waves fall in the 1.5-2m range (44.6% combined SSW/SW), with a significant portion reaching 2-2.5m (17.7% combined), offering barreling sections and high-performance walls. Winds are the main limiting factor, with ideal offshore conditions (light E/ENE) occurring only 5% of the time. The most common winds are from the SE-SSW at 10-20kph (55.8% occurrence), which can create challenging cross-shore chop on bigger days. However, mornings often see lighter winds, providing cleaner conditions. Expect heavier SW swell energy to dominate, producing thicker, faster waves compared to the slightly more manageable SSW lines. This is not a beginner-friendly month—the combination of significant swell energy and inconsistent wind conditions demands strong paddling and wave-reading skills.