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.

December at Keramas offers solid surf conditions, with an average swell height of 1.4m and a healthy period of 13.1s, ensuring clean, powerful waves. The swell is predominantly from the SSW and SW, with the majority of waves falling in the 1-2.5m range, making for quality, rideable surf—particularly at head-high to overhead+. Wind conditions are favorable 39% of the time, though variable. Offshore winds (E to NE) are light to moderate (0-20kph) but occur less frequently, while onshore WSW and W winds can pick up to 20-30kph, occasionally stronger, leading to choppier conditions. When winds align, expect groomed, hollow waves ideal for performance surfing; however, wind shifts may require patience for optimal sessions. Overall, December delivers consistent surf with a mix of excellent and challenging days.