Bombies - surf spot statistics

Bombies in Indonesia is a world-class reef break known for its powerful, barreling waves, and the data shows consistent swell year-round. The best months for surfing here are from April to September, when ground swell dominates (93–99%), ensuring clean, organized waves with minimal wind swell interference. During this period, mean swell size increases from 1.4m in April to a peak of 2.0m in August, offering ideal conditions for advanced surfers seeking bigger, more powerful waves. However, wind conditions deteriorate significantly from May onward, with bad onshore winds prevailing 77–98% of the time, particularly worst in August and September (98%). Despite poor winds, the swell consistency and size make it the prime window for experienced surfers willing to tolerate gusty conditions. The shoulder months like March and October still provide strong ground swell (93–96%) but with slightly better wind percentages (32% and 4% good winds, respectively). November to February sees smaller swells (1.4m) and higher wind swell influence (up to 18%), but better wind conditions (21–41% good winds) make these months more suitable for those prioritizing cleaner faces over raw power. Overall, the core season (May–September) delivers the heaviest and most consistent waves, while the off-season trades size for cleaner but smaller conditions.

September at Bombies delivers consistent, powerful surf with a solid average swell height of 1.9m and a long, well-spaced period of 14.6s, creating highly rideable, clean waves. The dominant swell direction is from the SSW, SW, and S, with the highest frequency of waves in the 1.5-2.5m range—ideal for experienced surfers. Notably, SSW swells between 1.5-2.5m occur nearly 45% of the time, offering powerful, barreling conditions. However, wind quality is a limiting factor: only 2% of days provide ideal offshore winds (typically light ESE or SE breezes). The majority of winds blow from the SE to SSE at 20-40kph, creating cross-onshore chop. While the swell is world-class, wind conditions demand patience—early mornings or rare wind shifts provide the cleanest sessions. This is a spot for confident surfers, with sizeable, heavy waves and occasional XXL days when swells exceed 2.5m. Pack your step-up or gun and watch for those rare, glassy windows.