Conditions at Sandvik in September
September: Autumn Stirrings
September marks the beginning of the seasonal transition as the North Atlantic starts waking up after summer. Average swell height climbs to about 5ft (1.5m) and period lengthens to 9.4s, producing more organized swell. SW (21.8%), SSW (15.1%) and WSW (11.9%) dominate, and the size distribution shifts upward-sessions in the 1.5-2.5m range become more common. Ideal offshore wind occurs 15% of the time, a solid step toward winter reliability, and the water is still relatively warm at 10.4°C. Air temperatures average 8.3°C and precipitation rises to 4.93mm/day as the storm track begins to deepen. September is a prime shoulder month: enough SW groundswell to fire Sandvik, plus a better chance of clean offshore NE winds than mid-winter.
Average Spot conditions at Sandvik in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Sandvik 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 Sandvik for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sandvik 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 Sandvik.