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.

April at Bombies offers consistent surf, with an average swell height of 1.4m and a strong, well-spaced period of 14.2s—ideal for powerful, clean waves. The swell predominantly comes from the SSW (41% of waves in the 1-1.5m range, 22.5% in 1.5-2m) and SW (16% in 1-1.5m), delivering quality groundswells that favor the reef’s setup. Cross-shore or light onshore winds from the ESE-SE quadrant occur frequently, but only 23% of wind conditions are truly ideal (likely light/variable mornings or SE trades under 10kph). Expect some texture from SE winds (8.8% at 10-20kph, 6.6% at 20-30kph), but larger days (2m+) are relatively rare (5.5% of swells). For experienced surfers, mid-sized SSW pulses with morning wind windows provide the best sessions—fast, hollow sections when the period holds. Wind-prone afternoons are the main drawback, so dawn patrols are key. Not quite dry-season perfection, but still a reliable month for solid, if occasionally bumpy, tubes.