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Conditions at Dungeons in September
September: Spring Transition and Lingering Swell
September is a transitional month, but the swells from winter are slow to fade. The average wave height remains a solid 8.9ft (2.7m) with a period of 12.1s, keeping Dungeons in prime big-wave territory for a good portion of the month. SW (17.8%), SSW (11.0%) and WSW (9.7%) dominate the swell directions, while S (6.5%) adds some pure south energy. The wind regime is more split: SSE (18.2%) and SE (16.4%) are back in force, ideal offshore flow sits at just 10%, and NNW (10.7%) and NW (9.5%) winds still offer occasional clean gaps. This is a month where timing is everything - you need to catch the clear window after a cold front, before the spring seabreeze sets in. Air temperatures rise slightly to 14.9°C (10.1-24.6), water temps nudge up to 15.2°C, and rainfall decreases to 1.30mm/day. For those willing to gamble, September can deliver late-season gems.
Average Spot conditions at Dungeons in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Dungeons 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 Dungeons for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Dungeons 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 Dungeons.