Conditions at Grupuk in October
October: Monsoon Flip Tantalizes
October is the start of the monsoon transition, but it does not yet deliver clean conditions for Grupuk. The average swell height remains solid at 1.6m (5.2ft), period 13.7s, and SSW swells account for nearly 89% of all energy, with 8% from the SW. The 1-1.5m and 1.5-2m ranges are evenly split, and there is a scattering of 2-2.5m sets. However, ideal wind is still only 2%. SE/SSE winds continue to dominate, and the change toward northwesterly flow has not fully arrived. The late months promise a flip, but October itself is usually an onshore, low-quality grind.
Average Spot conditions at Grupuk in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Grupuk during October. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Grupuk for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Grupuk for October. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Grupuk.