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.

December at Bombies delivers consistent surf with an average swell height of 1.4m and a solid 12.9s period, indicating powerful, well-spaced waves. The swell is predominantly from the SSW (30.5% in the 1-1.5m range, 12% in 1.5-2m) and SW (25.4% in 1-1.5m, 6.2% in 1.5-2m), offering clean, lined-up walls ideal for advanced surfers. Smaller contributions from the S and WSW add variety. Wind conditions are less reliable, with only 21% of days providing ideal offshore or light cross-shore winds (mostly from the N to ENE). However, moderate onshore winds from the W to SE (peaking at 6.2% SE 10-20kph) can create chop during higher wind speeds. Expect occasional bigger sets (2-2.5m, ~2% WSW-WNW) for experienced riders. Overall, December is prime time for quality waves at Bombies, but wind luck plays a role—dawn patrols or late sessions may be key when winds cooperate.