Red Tree Reef seasonal overview
Best Surf Season (October - March)
The North Pacific roars to life during the autumn and winter months, delivering a sustained barrage of powerful, long-period groundswells to Red Tree Reef. Average swell heights climb above 2.5m, peaking at 3.0m in December, with periods consistently in the 11-12s range – that's the sweet spot for this west-facing reef. The dominant swell directions shift predominantly through the SW, WSW, and W quadrants, which align perfectly with the reef's optimal exposure. Offshore wind conditions are most reliable during this period, with ideal wind percentages hovering between 24% and 29%, often courtesy of high-pressure systems settling over the interior that pump clean ENE to SE breezes. When these ingredients combine, the reef fires, offering peaky, powerful waves that demand respect.
Fair Surf Season (April - May & September)
As the North Pacific storm track starts to weaken in spring, average swell heights drop to 2.2m in April and 1.7m in May, while periods shorten to around 10-11s. The swell energy is still present, but it becomes less consistent and more reliant on Southern Hemisphere pulses or late-season low-pressure systems. April sees the highest offshore wind frequency of the year at 30%, making it a prime month for clean, albeit smaller, conditions. September marks the transition back into winter, with average heights climbing back to 2.0m and periods picking up to 9.9s. While the swell is still building, the wind plays a trickier game – ideal conditions occur only 24% of the time, often requiring a careful eye on local pressure gradients.
Low Surf Season (June - August)
Summer slumps hard at Red Tree Reef. The North Pacific storm machine shuts down, leaving the reef relying on weak, distant Southern Hemisphere swells that arrive with less punch. Average swell heights bottom out at 1.3-1.4m, and periods dip to 9.8-10.2s – rideable but rarely exciting. The swell direction becomes heavily biased toward the SW and SSW, which, while still workable, doesn't bring the same juice as a solid W or WNW swell. To make matters worse, the wind is far from cooperative. Ideal offshore conditions fall to 21-23% of the time, with strong, persistent NW winds dominating a quarter of the days. The result is a summer of small, often choppy surf that is best suited for a longboard or a groveler when the occasional west wind swell aligns.
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Conditions at Red Tree Reef in September
September: The Autumn Awakening
September heralds the transition back to winter, with average swell height climbing to 2.0m and period to 9.9s. The swell window remains dominated by SW (25.8%) and WSW (27.8%), but there is a noticeable increase in W (6.4%) and even WNW (1.0%) contributions. These longer fetch directions herald the return of more powerful, lined-up waves. The period is still short enough to limit quality, but the trend is upward. Wind conditions remain challenging, with ideal offshore days at only 24%. Strong SE to S winds are common, often creating bumpy conditions. However, the month offers a mix of summer-like warmth and building swell, with the potential for excellent sessions when a strong early-season storm passes well to the north, leaving behind clean offshore winds and building W swell.
Average Spot conditions at Red Tree Reef in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Red Tree Reef during September. 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 Red Tree Reef for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Red Tree Reef for September. 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 Red Tree Reef.
