Conditions at Haleiwa in October
October: The North Pacific Wakes Up
October is a turning point at Haleiwa. The average swell height climbs to 6.5ft (2.0m) and the period lengthens to 10.7s, reflecting the first significant storm activity in the North Pacific. Although ENE and NE swell still account for 46.6% combined, the optimal NNW window jumps to 14.5% and N reaches 7.1%. That mix of long-period, northwest-oriented energy is exactly what Haleiwa needs to turn from a trade-wind mushburger into a legitimate wave.
The wind is also more cooperative. Ideal S/SW flow arrives 48% of the time, and the trades, while still present, are much lighter on average. Water temperature is still warm at 26.8°C, air temperature is 25.8°C, and precipitation begins to tick upward at 1.83mm/day. October is a transition month with real potential: early NW pulses can produce surprisingly good Haleiwa sessions before the full winter engine kicks in.
Average Spot conditions at Haleiwa in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Haleiwa during October. 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 Haleiwa for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Haleiwa for October. 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 Haleiwa.