Conditions at Topanga in September
September: The Transition Back To Life
September is where the autumn transition starts to show. The wind improves to 38% ideal, with the north/northwest quadrants beginning to re-establish themselves-NW wind at 5.6% and NNW at 6.1%-while the onshore flow starts to ease. Swell remains long-period at 12.6s with an average height of 2-3ft (0.8m); the mix is predominantly WSW at 38.8% and SW at 35.9%, but the SSW component at 13.0% is a sign of tropical and southern-hemisphere swell creeping into the window. Water temperature reaches its annual peak around 17.4°C, air temps average 21.9°C, and rain is still almost zero. Long-period, clean-lined waves can appear whenever the offshore north wind lines up.
Average Spot conditions at Topanga in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Topanga 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 Topanga for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Topanga 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 Topanga.