Rottnest Island • Surf Spot Statistics

Best Surf Season (June - August)

The Southern Ocean storm track hits its peak in the heart of the Australian winter, and Rottnest Island feels the full force. Average swell heights climb to 8-9ft (2.5-2.7m) with periods in the 12.8-13.1s range, delivering powerful, well-organized groundswell from the SW and WSW. The subtropical ridge moves north, allowing more frontal systems to sweep through the bight, and the wind distribution tilts toward the offshore N, NE and NW quadrants much more often. Ideal surf conditions jump to 15-16% during these months - the highest of the year - and the island's south-facing breaks light up with heavy, hollow peaks and long-period energy.

Fair Surf Season (April, May, September, October)

The shoulder months are a mixed bag. April and May see the swell building from 6-7ft (2.0m) to 7ft (2.2m) with 12.7s periods, while September and October still pump out an average 7-9ft (2.2-2.6m) of long-period SW groundswell. Wind quality becomes more inconsistent: spring sea breezes and synoptic onshore flow from the S and SSW gradually return in September and October, while autumn offers cleaner N to NE offshore winds more frequently. Ideal surfing percentages sit in the 11-15% range in April and May before dropping to 7-12% in spring. There are excellent windows if you time the frontal passages right, but the quality is less consistent than winter.

Low Surf Season (November - March)

Summer sees the subtropical ridge settle over the region, and the Southern Ocean storm track weakens or shifts south. Average swell heights settle back to 6ft (1.8-2.0m) with periods around 11.6-12.4s, so there is still energy in the water, but the prevailing S to SSW sea breeze becomes the dominant wind regime, blowing directly onshore at the south-facing beaches. Ideal surfing conditions drop to just 3-6% of the time, with December the most marginal month. The waves are often bumpy, wind-blown and crumbly, though occasional pulses of longer-period SSW/SW groundswell combined with early morning offshore N/NW breezes can still produce fun, rippable surf, especially in March when the swell period begins to lengthen.