Injidup Carpark - surf spot statistics

Best Surf Season (June - August)

The heart of the Southern Hemisphere winter brings the Indian Ocean to life. Powerful extratropical storms marching eastward below Australia generate consistent, long-period groundswells that pulse into the southwest coast. Average wave heights climb to a peak of 2.8m in July, with periods frequently exceeding 13 seconds – think pumping, heavy sets that demand respect. However, the trade-off is wind: the ideal offshore flow (east to southeast) only clocks in around 17% of the time, as westerly and northwesterly winds often accompany the same low-pressure systems. The savvy surfer will target the windows between fronts when a high-pressure ridge settles over the Bight, delivering light east winds and glassy conditions. When it all aligns, Injidup Carpark can offer some of the most epic, charging waves of the year.

Fair Surf Season (April - May & September - October)

These transitional months strike a balance between swell size and wind quality. During autumn (April-May), the ocean is still charged by winter precursors, with average swell heights around 2.0-2.3m and periods of 12-13 seconds. Wind statistics show a higher frequency of favourable offshore directions – April leads the year with 28% ideal wind, often from the SE to SSE. This combo produces solid, rippable waves with cleaner faces. Spring (September-October) mirrors this, with swell slowly easing from winter's peak but still averaging 2.2-2.6m and periods above 12.8s. While wind quality dips slightly (18-19% ideal), the mixing of lingering swells and emerging easterly flows can create long, powerful rides without the winter crowds. These shoulder seasons offer the best trade-off between size and shape.

Low Surf Season (November - March)

Australia's summer and early autumn see a lull in swell activity as the storm track retreats southward. Average wave heights drop to 1.8-1.9m and periods shorten to around 12 seconds, yielding mostly fun-sized, groveling waves. The predominant swell direction remains SSW-SW, which is side-on to the WNW-facing beach, reducing the quality of the wave face. Ideal wind percentages are at their annual lows (15-20%), and the prevailing sea breeze patterns (often from the SW to W in the afternoon) can chop up conditions quickly. Early mornings with light offshore E to SE winds are the best bet for a small, clean session. Still, for those willing to wait, occasional pulses from distant storms can break the monotony, but consistency is lacking. Overall, these months are best suited for longboarders and beginners unless a proper winter-like front slips north.

August: Late Winter Gold – Swell Holds, Winds Moderate

August remains deep in winter mode but shows signs of the coming transition. Average swell height is still a robust 2.7m, and the period peaks at 13.3s – the highest of the year. SW swell dominates (25.6%), but WSW (14.0%) and W (4.1%) still provide quality angles. The wind ideal percentage holds at 17%, but the distribution of wind directions begins to shift: westerly winds (from WSW to WNW) are still prominent but slightly less violent than July. The frequency of strong offshore (SE to SSE) is also stabilising. This creates more session-worthy windows where you can find powerful, long-period waves with manageable winds. Swell heights in the 2-2.5m range are the most common (over 35% of observations), with occasional larger sets. August offers the best of winter: consistent, hefty swell with a slightly higher chance of good wind. The days are lengthening, and the sun is a bit higher, making early-morning missions more pleasant. For those chasing charging, pro -level waves, August is prime time – just be ready to check the forecast daily for that brief alignment of swell and offshore flow.