Impossibles - surf spot statistics

Impossibles in Indonesia is a consistent year-round surf spot with near-perfect ground swell dominance, rarely affected by wind swell or flat spells. The best months for surfing here are April, September, October, and November, when optimal wind conditions align with solid swell. April stands out with 100% ground swell, 60% favorable wind conditions, and a mean swell size of 1.6m, making it one of the most reliable months. September also boasts 100% ground swell and balanced wind conditions (51% good), paired with larger waves averaging 2.1m. October and November are prime for offshore winds (73-74% good conditions) and manageable swell sizes (1.5-1.8m), ideal for long, clean rides. The peak swell season runs from June to August, with the biggest waves (2.0-2.2m), but wind conditions are less favorable (only 21-31% good), often resulting in onshore choppiness. January-February and December have strong ground swells (92-94%) but suffer from poor wind stats (80-81% and 63% bad, respectively). March and May offer decent compromises—March has improving winds (42% good), while May sees larger swells (1.8m) before the summer wind deterioration. Overall, advanced surfers will prioritize April and September-October for the best combo of clean faces and strong ground swells, while those seeking bigger but choppier waves should target June-August.

July at Impossibles delivers consistent, powerful swells with an average height of 2.1m and a strong 14.9s period, indicating well-spaced, energy-packed waves. The dominant swell direction is from the SSW and SW, with the majority of waves falling in the 1.5–2.5m range, offering ideal conditions for intermediate to advanced surfers. Notably, 16.17% of SSW swells and 12.71% of SW swells hit the 1.5–2m range, while larger 2–2.5m waves appear 23.95% of the time from the SSW—making this the prime direction for solid overhead sessions. Wind conditions are less reliable, with only 21% of days offering clean offshore or light cross-shore winds (typically ENE to SE under 20kph). However, ESE winds dominate, frequently blowing 20–30kph (32.26% of the time), which can create choppy or semi-choppy surfaces. Mornings often provide the cleanest windows before the trade winds pick up. Overall, expect powerful, heavy waves with occasional wind challenges, favoring confident surfers who can handle sizable, fast-breaking walls.