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.

In April, Belongas Bay typically offers solid surf conditions with an average swell height of 1.5m and a strong average period of 14.3s, indicating well-organized, powerful waves. The majority of swell comes from the SSW and SW directions, with the most consistent waves falling in the 1-2.5m range, peaking around 1.5-2m (26.6% occurrence from SSW). This suggests frequent overhead to slightly double-overhead sessions, ideal for experienced surfers. Wind conditions are variable, with favorable offshore or light cross-shore winds occurring only 22% of the time. The predominant ESE to SE winds (often 10-30kph) can create choppy conditions, particularly when stronger (20-30kph winds occur ~18% of the time from ESE). Swell direction aligns well with the bay's orientation, producing clean, long walls when winds cooperate. Expect a mix of epic glassy mornings and wind-affected afternoons, requiring careful timing for the best sessions. Overall, April delivers high-quality waves for advanced surfers, though patience is needed to capitalize on the best wind/swell combos.