Conditions at Tonel in September
September: The Autumn Resurgence
September is where the magic begins to return to Tonel. The average swell height is 1.5m (5ft) and the average period expands to 10.4s, so waves are starting to gain groundswell power again. Swell direction remains NW-heavy, with NW at 47.1%, NNW at 25.5% and WNW at 14.3%, but the return of W (3.8%) and WSW/SW (2.4%) gives the west-facing beach more favourable angles than mid-summer. Average conditions are still modest, but the first Atlantic lows of autumn can deliver sneaker swell events with long, clean lines. Wind is also slowly improving: ideal offshore flow from the E/NE quadrant reaches 17% of the time, and the dominant NNW wind has relaxed to 46.0% compared with 65-68% in July and August. The water is warm at 19.3°C, air temps average 21.0°C, and rain is still scarce at 0.75mm/day. When a solid W/NW groundswell lines up with an offshore morning wind, September serves up some of the most enjoyable waves of the year.
Average Spot conditions at Tonel in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Tonel 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 Tonel for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Tonel 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 Tonel.