Conditions at Cave in September
September: Autumn Ignition and the Return of Real Swell
September is when Cave starts to wake up. The average swell height climbs to 5.2ft (1.6m), but more importantly the average period jumps back to 10.5s, reaching the powerful long-period threshold again. The first significant low-pressure systems of the autumn, and occasionally tropical remnants from the Atlantic, bring more W and WSW energy into the southwest-facing beach. NW and NNW swells still dominate the rose, but the quality share is noticeably better. Ideal offshore wind improves to 27%, close to the winter average, while air temperatures remain pleasant at 19.8°C and water temperature is at its warmest of the year around 18.2°C. Rain begins to creep back at 0.95mm/day. Early season swells with NE wind and warm water make September one of the most underrated months at Cave.
Average Spot conditions at Cave in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Cave 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 Cave for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cave 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 Cave.