Peahi-Jaws - surf spot statistics

Best Surf Season (October - March)

The North Pacific roars to life as winter deepens, and Peahi-Jaws transforms into the planet's premier big-wave arena. During these months, powerful extratropical storms track across the North Pacific, firing consistent, long-period NW to NNW groundswells that march straight into Maui's north shore. Average swell heights hover between 1.8m and 2.0m with periods often exceeding 12s, delivering the raw energy needed to bend Jaws into a heaving, barreling beast. However, the trade winds—blowing from the E and ESE—dominate the wind rose, keeping surfable conditions below 30% for most of this window. When a cold front pushes past Maui or a high-pressure system sets up to the south, light S to SSW offshore winds align with these massive swells, creating the world-class, XXL charging conditions the spot is famous for. The months of December through February consistently offer the highest probability of epic, heavy, pumping surf, while October and November serve as the ramp-up season, and March begins a slow decline.

Fair Surf Season (April - May & September)

During the shoulder months, the North Pacific storm track weakens and shifts, leading to a noticeable reduction in both swell size and consistency. April and May still see occasional north-northwest pulses, but the average swell height drops to 1.4m-1.7m and periods shorten to 10-10.6s, meaning the wave loses some of its signature power and length. The trade winds become even more entrenched, with E winds now blowing over 45% of the time, which is directly onshore and ruins the wave face. Still, there are brief interludes—often when a trough breaks down the trades—where S-SSW offshore flow and a moderate NW swell combine to produce clean, 'rippable' conditions at 1-1.5m, suitable for smaller guns. September sees a slight uptick in swell activity and swell direction beginning to rotate back toward the north; the average period climbs to 9.8s and ideal wind jumps to 23%, offering a taste of the coming winter. This is a transitional season: not consistently good, but with patient timing, you can find fun, solid waves while avoiding the hectic winter crowds.

Low Surf Season (June - August)

Summer in the North Pacific is a quiet time for Peahi. The storm track retreats into the high latitudes, and swell becomes dominated by weak, short-period trade wind waves from the ENE and E. The average swell height sits at just 1.3m with periods averaging 8.8-9.5s—too small and short to generate the deep-water focusing and steep face that Jaws requires. The wind is the cruelest blow: Easterlies blow relentlessly 70-80% of the time, creating rough, choppy conditions that make even the smaller waves uninviting. Offshore (S-SSW) wind days are extremely rare, with ideal surf windows under 14% for the entire season. The combination of small, messy swell and nearly constant onshore winds means Peahi is essentially flat or unsurfable for long stretches. It is the low season in every sense, and the best advice is to save your energy (and your jet-ski fuel) for the return of the north swell in the autumn.

December: The Cusp of Winter Greatness

December delivers the highest average swell height of the year at 2.0m, with a period of 12.3s—full-on epic, heavy, pumping territory. The swell is heavily weighted toward the north: NNW leads at 23.9%, NNE at 16.6%, NE at 16.3%, and N at 8.0%. This is pure Jaws fuel—long, powerful groundswell lines that wrap into the bay with authority. The wind, however, remains the limiting factor. Easterly trades (E and ESE) still account for 65.2% of observations, but ideal offshore wind (S-SSW) edges up to 4.0%, the highest of any month. The ideal surf window is 22%. When the stars align—a strong, late-fall storm pushes a long-period NNW swell and a High-pressure system sits to the south—you get the ultimate combination: glassy, XXL conditions that make the world's bravest tow-in surfers reach for their boards. December is the gateway to the heart of the Hawaiian big-wave season, and the potential for world-class sessions is immense.