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.

October: Return to Form

October marks a solid improvement in both swell and wind. Size averages 2.2m, period stays robust at 12.9s, and ideal winds hit 21% of the time. The swell direction is still heavily SW (40.1%) and WSW (15.4%), with W (2.6%) and a few day contributions from the NW. The wind pattern is much more balanced: the percentage of onshore NW flow drops, and offshore S to SSE winds increase in frequency and strength (often 10-30kph). This shift makes October a favourite for intermediate and advanced surfers. The waves are punchy and powerful, often in the 'pumping' category (1.5-2.5m), with occasional larger sets. The overall feel is consistent and user-friendly compared to the raw power of winter.