Supertubes - surf spot statistics

Best Surf Season (March - May)

As autumn settles in, the Indian Ocean begins to stir with a steady rhythm. Average swell heights climb from 1.9m to 2.3m, and the dominant long-period groundswell (12-13s) pulses with power. The most promising window emerges in April, when ideal offshore winds blow 29% of the time—the year's peak. Storms tracking across the Southern Ocean send consistent SW swell towards the NW-facing coast, while high-pressure systems stall offshore and deliver clean, glassy conditions. This is the sweet spot: solid, rippable waves with light winds from the S to SW quadrant. Expect plenty of 1.5-2.5m sets that barrel down the reef.

Fair Surf Season (June - August & September - November)

Winter roars with maximum energy—average swell heights hit 2.6-2.8m and periods hover around 13s, signaling powerful groundswell. The Southern Ocean is a storm factory, churning out XL swells (some exceeding 2.5m) that wrap into the bay. However, the trade-off comes in the form of less reliable offshore winds, with ideal conditions dropping to just 17-18% of the time in mid-winter. Frequent frontal passages bring gusty NW to SW winds, often mixing up the faces. Spring offers a gradual improvement: by October, the wind cleans up (21% ideal) and swell sizes remain solid at 2.2m. September through November provide a good mix of size and occasional windows of perfection, but you'll need to pick your days carefully.

Low Surf Season (December - February)

Summer settles over the region, and the swell machine winds down. Averages dip to 1.8-1.9m, with periods still respectable at 11.8-11.9s (mostly due to distant storm remnants). The dominant swell direction stays in the SW quadrant, but the energy is less consistent. Light offshore breezes from the S to SSE quadrant occur around 17-18% of the time—similar to mid-winter but with much smaller wave heights. The result is a lot of days with fun-sized, groveling waves under 1m. Occasional pulses of 1.5m+ swell can arrive, but the general vibe is relaxed, making this the go-to season for longboarders and those seeking mellow sessions.

May: Building Power

May sees the Southern Ocean fully awake. Average swell height jumps to 2.3m, period holds at 12.9s, and the ideal wind percentage drops slightly to 26% as winter storms start to disrupt the offshore flow. Swell directions begin to broaden: SW remains dominant (33%), but WSW jumps to 16.5% and even WNW and NW make an appearance at 2.6% and 1.4%, respectively—the first hints of swell from the optimal NW quadrant. This variety can create multi-directional peaks and occasional barrel sections. Winds are more variable with stronger components from the W and NW (onshore), but when the high-pressure ridges in from the south, it can be absolutely firing. Many days see pumping 2-2.5m swell with offshore S winds—a truly world-class combo.