Conditions at Kvassheim in September
September: Autumn Reawakening
September is when the North Atlantic truly starts to stir again. Average swell height rises to around 5ft (1.5-1.6m) and period jumps to 7.6s, so the waves regain some of the punch lost during summer. The S/SSW/SW/WSW window still accounts for around 27% of observed swell, while NW at 15.4% and WNW at 11.7% remain important background sources. Wind consistency is still stuck in summer mode at 18% ideal offshore, but the stronger pressure gradients bring more frequent, more sizeable swell events. Sea surface temperatures remain comfortable at 15.0°C, air averages 12.8°C with a max of 20.1°C, and rainfall increases to 4.99 mm/day. For the Northwest Europe surfer, this is the month to start watching the charts again: the window is open, the water is still warmish, and the first real groundswell of autumn can fire.
Average Spot conditions at Kvassheim in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Kvassheim 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 Kvassheim for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kvassheim 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 Kvassheim.