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Conditions at Indicators in September
September: Swell Machinery Restarts
September is the shoulder month where the ocean begins to wake up. Average swell height remains modest at 1.1m, but the period jumps back up to 9.1s, signaling the return of longer-period energy. The direction distribution becomes more varied: NE (34%), ENE (34%), NNE (13%) and E (9%), with a few more 2-2.5m waves out of the NNE than we saw over the summer. Ideal wind conditions stay high at 82%, and the offshore flow out of ENE, E and NE keeps things clean.
Rainfall increases to 4.91 mm/day - the wettest month of the year - and water temperature is at its warmest, 29.3°C, with air temperatures around 28.5°C. With a mix of tropical convection and early-season cold fronts, September is a month of transition that can serve up the first real swell of the new season.
Average Spot conditions at Indicators in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Indicators 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 Indicators for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Indicators 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 Indicators.