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.

Keramas in September offers consistent, punchy surf with an average swell height of 1.9m and a strong period of 14.7s, making it powerful and well-organized. The dominant swell direction is SSW to SW, with the best waves arriving in the 1.5-2.5m range (48.4% combined for SSW/SW swell). These swells produce hollow, barreling waves suited for advanced surfers. Wind conditions are less ideal, with only 5% of days offering clean offshore winds (likely light ENE or E winds). The majority of winds come from the SE-ESE (58.3% combined) at 10-30kph, creating cross-onshore chop that can affect wave quality. Mornings often provide the cleanest conditions before SE trade winds strengthen. Expect consistent head-high to double overhead waves, with occasional larger sets when SW swells push above 2.5m (1.03% of the time). While wind can be a limiting factor, the swell consistency and power make Keramas a reliable destination in September for experienced surfers willing to time sessions around wind shifts or prioritize raw wave quality over glassy conditions.