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Conditions at Good Rats in September
September: The Autumn Reawakening
September marks the beginning of the return to quality. Average swell height jumps back to 6-7ft (2.0m), although the period is still a modest 9.9s, meaning a mix of groundswell and strong windswell. The optimal directions are strongly represented: WSW 27.8%, SW 25.8%, SSW 11.2% and W 6.4%, and unlike summer, a meaningful portion of the energy now sits in the 1.5-2m (5-6.5ft) and 2-2.5m (6.5-8ft) classes. Good Rats starts to produce real, hollow waves again.
The wind, however, is still a limiting factor. Ideal offshore flow is only 27%, and the wind rose shows plenty of SSE (12.9%), S (11.0%) and SE (10.6%) flow. Late-summer tropical moisture and early autumn cold fronts also bring the wettest conditions so far, with precipitation averaging 8.9mm/day. Air temps average 10.0°C (50.0°F), water temp is a pleasant 13.0°C (55.4°F). If you can find a NE wind window between systems, September offers a sneak preview of winter.
Average Spot conditions at Good Rats in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Good Rats 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 Good Rats for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Good Rats 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 Good Rats.