Hanalei Bay • Surf Spot Statistics

Best Surf Season (October - March)

Hanalei Bay is a North Pacific arrowhead that points straight at the winter storm track. From October through March, the Aleutian Low strengthens and repeatedly spawns gale-force lows that send long-period NNW, NW and N swells toward the Hawaiian chain. Average swell heights climb to 2.0-2.7m (6.5-9ft) and periods lengthen to 11-13s, creating the powerful, bowling lines that Hanalei is famous for. While trade winds still blow for a good share of the winter, the cleanest days come when a cold front pushes through and winds swing into the south and southeast, turning the bay into a glassy arena of heavy, rippable surf.

Fair Surf Season (April & September)

The shoulder seasons offer a mix of fading winter juice and building trade swell. April still picks up late-season NNW and NW groundswells between strengthening east-northeast trades, while September marks the return of longer-period north energy as the Pacific transitions back to winter. Neither month is as consistent as the core winter, but both can deliver fun, clean waves without the extreme size and crowd pressure of mid-winter.

Low Surf Season (May - August)

From May through August, the North Pacific storm track retreats and Hanalei settles into summer mode. Average swell heights drop to around 1.6-1.7m (5-5.5ft) and periods shrink to 8-9s, with the dominant swell shifting to east-northeast and east windswell that is mostly shadowed by the island. Trade winds blow hard and relentlessly side-shore, so the bay struggles to hold quality. A few fun, small days exist when the trades lighten or a rare south swell creeps in, but overall this is the least consistent stretch of the year.