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Conditions at Cape St Francis in September
September: Spring Swing with Building Westerlies
Spring arrives and the swell average eases slightly to 10ft (3.0m), with a period of 11.8 seconds and ideal wind at 26 percent. SW remains the main swell direction at 13.0 percent, with SSW at 8.6 percent, but E-angled swell climbs back to 1.8 percent - a sign that the ocean is rebalancing. Wind is a toss-up: WSW 19.6 percent, W 20.2 percent, ENE 12.8 percent, and E 9.1 percent. That means a lot of clean offshore westerly flow, but still a persistent onshore easterly component in the afternoons. Water temperature is 17.0°C, air 16.1°C, and rain falls at 1.07 mm/day. September is a fair month: the long-period Southern Ocean groundswell is still very much alive, and when an E pulse lines up with a light southwesterly, the setup can be excellent.
Average Spot conditions at Cape St Francis in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Cape St Francis 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 Cape St Francis for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cape St Francis 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 Cape St Francis.