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Conditions at Hanalei Bay in March
March: Late-Season Juice with Rising Trades
March is the last full month of the official winter season, and the numbers still show plenty of life. Average height comes in around 8ft (2.4-2.5m) with an 11.8s period, led by NNW swells at 17.8% and NNE at 8.8%, along with 6.8% from NW and 5.3% from N. However, the jump in NE and ENE swell (9.8% and 9.6%) is the first sign that the trade-wind machine is revving up for spring.
Onshore northerly flow is rare at about 14%, but ideal south and southeast winds only show up 30% of the time. The dominant fingerprint is the strengthened easterly trade regime, which can chop up winter groundswell and make the bay less clean. March is still worth chasing, but pick the days when the wind is in the south or southeast. Water temperature remains 23.6°C (74.5°F), while rainfall peaks near 3.1mm per day.
Average Spot conditions at Hanalei Bay in March
Swell history for March
Wind history for March
Swell quality
Analyze the groundswell consistency at Hanalei Bay during March. 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 March.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Hanalei Bay for March. 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.