Conditions at K59 in September
September: Peak Wet-Season X-Factor
September is the most conflicted month on the calendar. Average swell height ties for the year's high at 1.4m (4.6ft), with a 13.0-second period, and the SW component grows to 16.2% alongside SSW at 73.1% and S at 8.7%. Critically, the 1.5-2.5m (4.9-8.2ft) range becomes more prominent, with over 25% of observations in the pumping-to-heavy category. This is the month when Eastern Pacific tropical cyclones and broad monsoon troughs can send serious, raw energy into the south-facing beach. The wind, however, is the great spoiler. Ideal surf wind drops to 53%, and the roses show a strong E, ESE and SE flow mixed with very light S-SSW onshore breezes. Precipitation is at its annual peak, 8.14mm per day, while air temperature is 26.4°C and water temperature is 29.9°C. If a hurricane or tropical wave passes at the right distance and a northerly outflow follows, K59 can absolutely light up. Otherwise, be ready for lumpy, rain-soaked conditions.
Average Spot conditions at K59 in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at K59 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 K59 for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at K59 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 K59.