Surf forecastStatisticsHistorical report

Wilderness seasonal overview

Wilderness, South Africa, offers consistent surf year-round, but the best conditions typically occur between April and August. During these months, ground swell dominates (62-72% probability), providing cleaner, more organized waves compared to wind swell, which is less favorable. Mean swell size is also most reliable in this period, averaging 2.2-2.4m, with June and July seeing the largest waves (2.3-2.4m). Wind conditions improve significantly from May to July, with good winds occurring 27-31% of the time—still not ideal, but better than other months when bad winds dominate (69-86% probability). The worst months for surfing are January, February, October, November, and December due to higher wind swell influence (53-62%) and poor wind conditions (81-86% bad winds). Swell size drops slightly in these periods (2.0-2.2m) with less ground swell contribution. March and September offer transitional conditions, with March slightly better due to higher ground swell likelihood (56%) and marginally improved winds. Overall, mid-autumn to mid-winter (April-August) is prime for experienced surfers seeking quality waves, despite still challenging wind patterns. For those prioritizing cleaner conditions, June and July stand out, though patience with wind is required.

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Conditions at Wilderness in September

September in Wilderness delivers consistent swell with an average height of 2.4m and a solid period of 10.7s, providing powerful, well-spaced waves. The most dominant swell direction is SSW, accounting for the largest percentage of waves in the 1.5–2.5m+ range (9–12% for 1.5–2m, 12% for 2–2.5m, and 1.3% over 2.5m). Swell from the S and SE also contributes, though less frequently, with decent energy (1.5–2.5m waves occurring 3–6% of the time). Wind conditions are mixed—only 17% of days offer ideal offshore (E to NE) or light cross-shore winds for clean surf. The predominant winds come from NNE to SSW, often blowing at 10–30kph, which can create choppy or onshore conditions, particularly from the S and SSW. Advanced surfers will find the best sessions when ENE or NE winds align with the SSW swell, offering clean, powerful waves. Overall, September brings reliable swell but requires patience for favorable wind windows.

Average Spot conditions at Wilderness in September

Swell history for September

0 - 0.5
0.5 - 1
1 - 1.5
1.5 - 2.0
2.0 - 2.5
> 2.5 m

Wind history for September

0 - 10
10 - 20
20 - 30
30 - 40
40 - 50
> 50 km/h

Swell quality

Analyze the groundswell consistency at Wilderness 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 Wilderness for your next trip in September.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Wilderness 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 Wilderness.

Swell with good wind

Swell with good wind by size