Conditions at Razo in September
September: The Autumn Switch Begins
September is when Razo starts to wake up. Average swell height climbs back to 6.2ft (1.9m) and the average period jumps to 10.2 seconds, a sign that the North Atlantic is regaining its energy. The swell source is firmly from the northwest, with NW at 22.7%, WNW at 17.2%, and NNW at 14.3%, while W adds 6.8% and NNE 7.3%. The combination of longer period and increasing size makes September the best month of the summer-to-autumn transition.
Wind conditions also improve. NE remains the most common direction at 19.2%, and NNE adds 12.6%, but the offshore quadrant is recharging: SSW reaches 10.6% and SW hits 8.7%, pushing ideal surf wind frequency up to 25%. Water temperature is still warm at 17.3°C, air temps average 17.9°C, and rainfall is moderate at 2.01 mm/day. September offers the first real taste of quality Razo surf before the heavy winter months arrive.
Average Spot conditions at Razo in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Razo 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 Razo for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Razo 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 Razo.