Conditions at Bore in September
September: Autumn Begins to Stir
September is a transitional month where the North Atlantic slowly starts to wake up. Average wave height rises to 1.0m (3.3ft) and the period extends slightly to 7.1s, giving the first signs of real swell energy. The northwest still dominates, with NW at 16.3%, WNW at 13.8%, W at 13.8% and WSW at 10.1%. Larger waves in the 1-1.5m and 1.5-2m categories become more common than in summer. Ideal wind conditions improve to 9%, although NNW still dominates at 19.6% and SE is second at 10.9%. Water temps remain pleasant at 15.1°C, air averages 12.7°C, and precipitation is back up to 5.27mm/day. September is a month of change: the first strong cold fronts can deliver surfable waves, but you still need the wind to align for a truly clean session at Bore.
Average Spot conditions at Bore in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Bore 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 Bore for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Bore 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 Bore.