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.

July at Belongas Bay delivers consistent, high-quality surf with a solid average swell height of 1.9m and a long-period swell averaging 15.0s, producing powerful, well-formed waves. The dominant swell directions are from the SSW and SW, contributing the majority of waves in the 1.5–2.5m range (over 50% combined). This creates clean, organized lines ideal for experienced surfers, with occasional larger sets when the swell pushes above 2.5m. Wind conditions are less favorable, however, with onshore ESE to SE winds prevailing around 20–30kph for nearly half the month, leading to choppy conditions. Only 5% of the time do winds align for ideal surf (light/variable or offshore). Early mornings may offer cleaner conditions before the winds pick up. Overall, July provides strong, consistent surf but requires patience for the best sessions when winds cooperate. Advanced surfers will find plenty of powerful waves, though wind management is key.