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Conditions at Point Dume in September
September: The Calm Before the Autumn Shift
September is the hinge month between summer and fall. The surf remains small, with average height 0.9m (3ft), but the period is a healthy 12.4s and the swell direction is still coming from the southwestern quadrant: WSW (31 percent), SW (31 percent), SSW (18 percent), and W (18 percent). You can still pick up long-period southern hemi pulses, but they are inconsistent and mostly in the 2-3ft (0.5-1m) range. A modest improvement in wind, with ideal conditions 60 percent, means more rideable mornings and cleaner shape, especially before the westerly sea breeze kicks in. The ocean is at its warmest of the year around 17.5°C (63°F), with air temps at 21.9°C (71°F) and rainfall minimal at 0.09 mm/day. It is still low season, but those late-September windows can produce unexpected fun.
Average Spot conditions at Point Dume in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Point Dume 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 Point Dume for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Point Dume 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 Point Dume.