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Conditions at Hanalei Bay in October
October: The North Pacific Roars Back
October is the dramatic turnaround. Average swell height climbs to 6-7ft (1.8-2.0m) and period advances to 10.8s. The direction table shows a healthy 42.8% of swells from the ideal N, NNE, NW and NNW window, with NNE at 17.7%, NNW at 16.0%, N at 7.3% and NW at 1.8%. Although ENE and NE trade swell still account for a share of the mix, Hanalei starts to show its classic winter character more and more.
Ideal south and southeast flow is present 45% of the time, and with water at 26.6°C (80°F) and air temps near 26°C (78°F) it offers warm-water, clean Hanalei without the extreme size of mid-winter. Rain remains modest at about 1.9mm per day, so river runoff is less of an issue. October is a genuine sweet spot.
Average Spot conditions at Hanalei Bay in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Hanalei Bay 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 Hanalei Bay for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Hanalei Bay 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 Hanalei Bay.