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Serangan - surf spot statistics
Serangan seasonal overview
Best Surf Season (December - February)
This is the peak window at Serangan, driven by the northwest monsoon. Consistent offshore winds from the west and northwest deliver clean, groomed conditions 60-64% of the time. While the dominant swell comes from the SSW and SW—not the ideal E-SSE direction—the offshore flow transforms these long-period Southern Ocean groundswells into smooth, rippable waves. Expect average wave heights around 1.6-1.7m with periods of 12-13s, offering fun to pumping surf day after day.
Fair Surf Season (March & November)
These months represent the transition between monsoons. March still sees moderate offshore wind (48% ideal) with powerful 13.3s swell, but the trade winds begin to creep in. November marks the return of the monsoon with 31% ideal wind, after months of onshore slop. Wave heights average 1.6m, and while the swell direction remains south-oriented, the improving wind quality makes these months solid secondary targets.
Low Surf Season (April - October)
The southeast trade winds dominate from April through October, blowing directly onshore from the E-ESE-SE quadrant. Ideal wind plummets to 19% in April and further down to 0-3% from May through August. Although swell energy peaks during these months—averaging 1.9-2.2m with long periods over 14s from the deep south—the constant onshore wind wrecks wave quality, creating lumpy, choppy, and difficult conditions. Only rare light-wind windows or early mornings offer any refuge. September and October see a slight uptick in wind quality (3-13%), but conditions remain marginal.
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Conditions at Serangan in December
December: Prime Season – Monsoon Gold
December is the peak of the surf season at Serangan. Ideal wind hits 62% as the northwest monsoon delivers consistent offshore winds from the W (33.7%) and WSW (16.8%). Swell averages 1.6m at 12.7s, with 57.0% from SSW and 36.5% from SW. The waves are clean, fun-sized to pumping, and groomed by the offshore breeze. This is the month to plan your trip around—consistent quality in both wind and swell.
Average Spot conditions at Serangan in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Serangan during December. 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 Serangan for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Serangan for December. 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 Serangan.