Conditions at Banana Beach in September
September: The First Crack of Autumn
September is the quietest month in the raw size stats - average 1.5m (5ft) - but the first signs of change appear. The average period climbs back to 10.1s, which improves wave quality even if the height is modest. Swell direction is still heavily NNW (74.0%), but NW (19.0%) and WNW (2.0%) are growing, giving Banana Beach a slightly more open window and a better angle.
Wind quality is moderate at 46% ideal. NNW (29.7%) and NW (20.9%) dominate, but the offshore NNE-E sector is becoming more regular at around 17%, and the onshore W-SW quadrant remains small. Air temps are still summerlike at 25.2°C, water temp is the warmest of the year at 18.4°C, and rain is still low at 0.25mm/day. You will need to pick your swell windows, but the quality is starting to trend up.
Average Spot conditions at Banana Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Banana Beach 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 Banana Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Banana Beach 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 Banana Beach.