Surf forecastStatisticsHistorical report

Strand seasonal overview

Best Surf Season (May - August)

Winter in the Southern Hemisphere brings the South Atlantic to life, and Strand reaps the rewards. From May through August, the average swell height climbs to 2.5-2.8m with long periods of 12.3-12.5s, fed by a relentless train of extratropical storms roaring through the 'Roaring Forties'. The dominant swell directions – SW and SSW – align perfectly with Strand's southwest-facing orientation, delivering powerful, rippable waves. At the same time, the wind regime shifts favorably: high-pressure systems nudge over the interior, dialing in steady offshore breezes from the NNE through E quadrant. During these months, the wind is ideal for surfing over 55% of the time, often producing clean, lined-up surf that holds size. This is the pinnacle of the year for consistent, quality waves at Strand.

Fair Surf Season (April & September)

April and September serve as transition months between the peak winter swell and the calmer summer. In April, average swell height remains solid at 2.3m with a 12.0s period, and the wind goes offshore 44% of the time – a solid chance for clean surf. September sees slightly larger average swell at 2.6m, though the period drops to 11.9s and the offshore wind window narrows to 39%. These months offer plenty of rideable surf, but the consistency and quality are more variable as the storm track wavers and wind patterns become less reliable. Expect good days interspersed with periods of onshore SW wind that chop up the lines.

Low Surf Season (October - March)

From October through March, summer dominates Strand. The swell source weakens as the South Atlantic storm track shifts southward; average heights hover between 2.1-2.3m with periods of 11.1-11.4s – still fun, but less powerful. The bigger issue is the wind: the percentage of ideal offshore wind plummets to between 19-30%. Instead, the prevailing seabreeze pattern often builds onshore flow from the SW and W during the afternoon, ruining the wave quality. While early mornings can offer brief windows of clean conditions, the majority of the time the surf is bumpy, choppy, and less consistent. This is the time to be selective and chase the early light, or the occasional cold front that stalls a shallow low offshore.

Loading chart...

Conditions at Strand in September

September: Waning Winter, Weakening Winds

September marks the transition away from winter. Average swell height drops to 2.6m and period to 11.9s, still very solid, but the energy is diminishing. Swell directions are still dominated by SW (18.1%) and WSW (9.6%), with some W (3.1%) and WNW (0.8%) contributions. The biggest change is the wind: ideal offshore conditions fall to 39% of the time. The SE and SSE winds return with more frequency (27.1% combined), often kicking up in the afternoon and chopping the surface. Mornings can still deliver clean, fun surf, but the windows are shorter. September offers plenty of rideable waves, but the quality requires more patience. Look for days when a high-pressure system stalls over the interior to lock in steady offshore flow.

Average Spot conditions at Strand 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 Strand 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 Strand for your next trip in September.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Strand 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 Strand.

Swell with good wind

Swell with good wind by size