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Conditions at Jeffreys Bay in September
September: Shoulder Season Transition
September is a transitional month. Average swell remains solid at 10ft (3.0m), period eases to 11.8s, and ideal wind drops to 40%. SW (13.0%) and SSW (8.6%) are still dominant, but the E/ESE sector grows to 4.5%, hinting at the warmer months ahead. Wind-wise, WSW (19.2%) is the single most common direction, W (15.2%) is strong, and onshore E/ENE picks back up (E 7.6%, ENE 8.5%). This creates a mix of clean winter-like days and raw, bumpy spring days. Water temp starts to warm from the annual low at 16.8°C, air temps average 16.1°C, and precipitation is 1.07mm/day.
Average Spot conditions at Jeffreys Bay in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Jeffreys Bay 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 Jeffreys Bay for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Jeffreys Bay 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 Jeffreys Bay.