Uluwatu - surf spot statistics

Uluwatu, Bali, is a world-class reef break with consistent year-round swell, predominantly powered by ground swells (90%+ of the time). The best months for surfing here combine solid swell size with favorable wind conditions. From April to October, the swell is most reliable, peaking in June, July, and August with mean swell heights of 2.0–2.2m, ideal for advanced surfers. However, wind conditions vary significantly—April, September, October, and November offer the best balance, with good offshore winds occurring 51–76% of the time. October stands out as the prime month, with 74% good wind conditions and a solid 1.8m average swell. The dry season (May–September) brings bigger waves but often suffers from less ideal winds (only 21–31% favorable in peak swell months). Conversely, November and March provide decent swells (1.5m) and better wind setups, making them good alternatives. December to February sees slightly smaller swells (1.5–1.6m) and the worst wind conditions (78–79% onshore), though ground swells remain dominant. For the best all-around experience, target April, September, October, or November—when swell consistency, size, and wind align most favorably.

December at Uluwatu delivers consistent, high-quality surf with an average swell height of 1.5m and a solid 13.2s period, ensuring powerful, well-formed waves. The dominant swell direction is from the SSW and SW, with the majority of waves falling in the 1-2.5m range—ideal for intermediate to advanced surfers. Around 41% of the time, wind conditions are favorable (light to moderate offshore or cross-offshore), primarily from the E to SE, keeping the surface clean. However, stronger onshore winds from the W and WSW can occasionally disrupt conditions, particularly at higher speeds (20-30kph+), though they’re less frequent. Expect a mix of medium-sized, rippable days and occasional larger, more powerful sets, making December a reliable month for scoring hollow, high-performance waves at this iconic reef break.