Keramas - surf spot statistics

Keramas in Indonesia is a world-class right-hand reef break that offers consistent, powerful waves with a strong emphasis on ground swells throughout the year. The best months for surfing at Keramas are typically from May to September, when the swell is most reliable, and the wave size is at its peak. During these months, ground swells dominate with 97-99% consistency, and the mean swell size ranges from 1.7m to 2.0m, providing hollow, barreling waves that advanced surfers seek. However, wind conditions during this period are less favorable, with bad winds (onshore or cross-shore) occurring 92-96% of the time, which can sometimes make the waves messy, though the power of the swell often overrides this. The early season months of January and February also offer solid conditions, with ground swells at 88% and slightly better wind conditions (49-53% good winds). The swell size averages 1.5m, making it more accessible but still high-performance. March and December are transitional months with decent swell consistency (90-93% ground swells) but increasingly unreliable winds (bad winds at 61%). April and November see strong ground swells (96-97%) but suffer from poor wind conditions (81-83% bad winds), reducing surf quality. The worst months for favorable wind conditions are May through October, when good winds drop below 10%, but the sheer power and consistency of the swell still attract experienced surfers willing to trade wind quality for wave size and shape. Overall, if you prioritize clean, powerful waves, the peak season from May to September is ideal despite the wind challenges, while January and February offer a good balance of swell and slightly more favorable winds.

August at Keramas delivers consistent surf with an average swell height of 2.0m and a solid 14.9s period, ensuring powerful, well-defined waves. The dominant swell directions are SSW and SW, accounting for the majority of waves in the 1.5–2.5m range, with a notable 22.39% of SSW swells hitting the 2–2.5m mark—ideal for advanced surfers seeking hollow, high-performance rides. Wind conditions are less favorable, with ESE and SE winds dominating at 10–30kph (combining for over 45% of occurrences), creating onshore chop that can disrupt wave quality. Clean offshore winds are rare, appearing only 4% of the time. Expect a mix of epic, barreling sessions when winds align, but frequently contend with breezy conditions. Pack your step-up board for the punchy swells and watch for early morning glass-offs.