Conditions at Keramas in September
September: Spring Swell Builds as Trades Hold
September is still in the low season for wind, but the swell engine is firing. Average height is about 3-4ft (1.1m) with a 14.1s period; direction is overwhelmingly SSW at 81.6%, with S at 16.5%. There is excellent size and period on paper-SSW delivers 51.3% in the 3-5ft (1-1.5m) range and 3.2% at 5-6ft (1.5-2m). If the wind ever relents, Keramas would be all-time.
Only 2% of the time is the wind ideal. The synoptic pattern is still trapped in the SE trades: SE (36.3%), SSE (26.7%) and ESE (22.4%) make the surface a constant battle. But the drying trend continues-1.22mm/day rain, 26.0°C air (22.0-30.8°C), and water warming slightly to 26.7°C. As the monsoon transition approaches, quality windows will begin to improve by the end of the month.
Average Spot conditions at Keramas in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Keramas during September. 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 Keramas for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Keramas for September. 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 Keramas.