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Conditions at Virac Harbour in September
September: Autumn Wildcard and Typhoon Swells
September is the first true turning point of the year. Average swell remains low at 0.5m (1.5-2ft), but the period stretches to 7.6s and ideal wind climbs to 15% as the southwest monsoon begins to loosen its grip. The swell rose shows ENE at 26.6%, NE at 22.3%, E at 13.7%, NNE at 7.8%, and N at 1.2%--a subtle but real shift toward the northeast monsoon directions that define the better half of the year.
Winds are still predominantly SW/WSW/SSW, but the NW/NNW quadrant starts to fire more often: NNW 5.2%, NW 5.1%, WNW 5.0%, N 1.5%. These offshore windows, combined with the peak of typhoon season, give September genuine wildcard potential. A well-positioned typhoon can send S/SW groundswell with 10-14s periods directly into the harbour. Rain is heavy at 9.19 mm/day and water is 29.5C, but the reward is there for the patient.
Average Spot conditions at Virac Harbour in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Virac Harbour 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 Virac Harbour for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Virac Harbour 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 Virac Harbour.