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Conditions at Green Island in January
January: Trade-Wind Slop and Occasional Summer Juice
January is peak summer on the Australian east coast and Green Island feels it. The average wave height sits at 1.6m (5ft), but the average period is only 8.1s, so the surf is generally short-period, punchy and often a little disorganized. There is plenty of energy from the NE, ENE and E quadrants - the product of the summer trade-wind regime - while the ideal ESE/SE/SSE/S window still contributes around 47 percent of the total swell. The making or breaking factor is wind: offshore N/NNW/NW/WNW flow only runs 16.8 percent of the time, while onshore SSE and S winds combine for more than 22 percent. With water at 21.9°C, air at 21.4°C and 2.78 mm/day of rain, the best surf comes after a southerly change, when NW winds clean up residual S/SE swell before the trades rebuild.
Average Spot conditions at Green Island in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Green Island during January. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Green Island for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Green Island for January. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Green Island.