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Conditions at Newport Beach in September
September: Hurricane-Swell Window and a Slight Wind Shift
September is the heart of the eastern Pacific tropical storm season, and that is reflected in the swell. Average period is a long 13.6s while average height is 0.8m (2-3ft). Swell direction is very favorable with SW at 43.7%, WSW at 26.6% and SSW at 24.3%. Tropical cyclones south of Baja can sometimes send extra energy into the region, pushing surf into the fun 3-5ft (0.9-1.5m) range.
Wind improves only slightly, with ideal offshore flow at 7%. W wind still dominates at 30.9%, with WSW at 17.8% and WNW at 16.0%. Water temperature is the warmest of the year at 18.3C, air temperature averages 20.7C, and rainfall is minimal at 0.10 mm/day. September can deliver the most rewarding south swells of the summer, but you need to be picky about tides and wind.
Average Spot conditions at Newport Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Newport Beach 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 Newport Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Newport Beach 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 Newport Beach.