Green Island - surf spot statistics

Best Surf Season (June – August)

As winter tightens its grip on the Southern Hemisphere, the Tasman Sea roars to life. The combination of strong frontal systems sweeping up from the Southern Ocean and a steady ridge of high pressure to the south funnels consistent, long-period S to SSE swells directly into the island's southeast-facing setup. Offshore flow from the prevailing NW to NNW winds becomes the norm, with ideal wind percentages peaking near 53% in July. This is Green Island at its finest – pumping, glassy, and firing.

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

The transitional shoulder months bring a mixed bag. Swell direction already favors the SE quadrant, and average heights hover around a solid 1.6-1.7m with periods stretching into the 8-9s range. However, the wind regime is more fickle – while offshore breezes dominate a decent chunk of the time, lingering onshore S to ESE pulses can chop up what would otherwise be pristine lines. Expect fun, rippable waves with occasional windows of perfection when a high-pressure system parks itself overhead.

Low Surf Season (November – March)

The summer months see a downturn in both swell quality and wind consistency. The storm tracks retreat poleward, leaving behind a diet of short-period, weaker E to NE swell that rarely aligns with the spot's optimal SE exposure. On top of that, the trade wind influence strengthens, with persistent ESE to S onshore winds ruining the groomed face. While the odd pulse from a tropical depression or a late-season cold front can salvage a session, the general rule of thumb is smaller, choppier and less reliable surf.

February: Persistent Onshore Pattern

February sees little change from January. Average swell height nudges up to 1.7m, but the period remains short (8.4s). The most frustrating aspect is the wind – only 34% of the time does it blow from the offshore quadrants. The dominant wind directions are from the NE and N, but the onshore SE and SSE winds still account for a significant chunk, especially in the afternoon. Swell direction is still heavily biased toward the E to SE, with only 13.8% from SSE and 5.9% from S. Combined with the low period, the typical wave is a gutless, wind-affected mess. Patience is key; the rare days when a southerly change brings a clean S swell and offshore NW winds are the ones to circle on the calendar.