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.

January at Belongas Bay offers consistent surf with an average swell height of 1.5m and a solid 13.0s period, providing powerful, well-formed waves. The swell is predominantly from the SSW and SW directions, with the majority of waves falling in the 1-2m range—ideal for intermediate to advanced surfers. Around 22-23% of the time, waves reach 1-1.5m, while 13-19% of the time they push into the 1.5-2m range, delivering punchy, high-quality rides. Larger sets (2m+) are less frequent but present, ensuring variety. Wind conditions are favorable for surfing 33% of the time, with lighter winds (0-20kph) prevailing, though afternoon onshore westerlies (WSW, W) can occasionally create chop. Mornings often see cleaner conditions. Overall, January delivers reliable, energetic surf with a mix of mid-sized to larger waves, best suited for surfers comfortable with powerful, fast-breaking waves. Wind management is key—early sessions typically offer the best shape.