Inside Lefts - surf spot statistics

Inside Lefts in Indonesia offers consistent year-round ground swells, with minimal wind swell interference, making it a reliable surf destination. The best months are from **April to June**, when ground swell dominance is at its peak (98-99%), swell size increases (1.4m to 1.8m), and wind conditions are relatively favorable (35-38% good winds). April and May stand out as the prime months, combining solid swell consistency with the highest likelihood of offshore or light winds. June follows closely, though wind quality slightly declines. The swell grows larger from **May to August**, with July and August seeing bigger waves (1.9m-2.0m), but wind conditions deteriorate significantly (only 9-21% good winds), making these months better for advanced surfers willing to endure cross-shore or onshore winds. **September to March** remains surfable, but the increasing frequency of bad winds (72-93%) and smaller swell size (1.4m-1.7m) reduce consistency. December to March still provides decent ground swell (82-93%), though wind conditions are less reliable (only 19-28% good winds). Overall, **April to June** delivers the best balance of size, consistency, and favorable winds for most surfers.

December at Inside Lefts delivers consistent, mid-sized swell with an average height of 1.4m and a strong 12.9s period, making for powerful, well-formed waves. The dominant swell directions are SSW and SW, accounting for over 30% and 25% of waves in the 1-1.5m range, respectively, with a notable percentage pushing into the 1.5-2m range (12% SSW, 6% SW). These swells are clean and organized, ideal for experienced surfers. However, wind conditions are hit or miss—only 19% of the time is the wind ideal (light offshore or glassy). The most common winds come from the W and WSW, often blowing 10-30kph (6-19mph), which can create cross-shore or onshore chop, especially when stronger. While the swell quality is reliable, surfers should time sessions for early mornings or days with lighter winds to maximize clean faces. Bigger sets (2m+) are rare but possible, mainly from SW and WSW directions. Overall, December offers solid surf if you can work around the wind.