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Conditions at Low Island in September
September: The Autumn Switch Flicks On
September marks the beginning of the transition back to serious surf. Average swell height jumps to 6.2ft (1.9m), and although the average period is still a modest 9.9s, the extra size is noticeable. WSW is the dominant swell direction at 29.0%, followed by SW at 25.3% and SSW at 10.8%. More importantly, the height distribution shows a solid push of energy in the 4.9-8.2ft (1.5-2.5m) bands. This is when low-pressure systems begin forming again in the North Pacific, although the ideal wind percentage remains low at 26%, with E/ESE/SE/SSE flow still frequent. Water temperature is 13.0°C (55.4°F), air temperatures average 11.4°C (52.5°F), and precipitation ramps up sharply to 9.13mm/day. September is a month to keep the quiver ready: the swell is improving, and the first great autumn session is never far away.
Average Spot conditions at Low Island in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Low Island 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 Low Island for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Low Island 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 Low Island.