Piha seasonal overview
Best Surf Season (February - April)
Piha's best windows fall in late summer and early autumn, when the Tasman Sea is still being fed by long-period Southern Ocean swell while high pressure often anchors itself over the New Zealand region. Average swells run 4-6ft (1.2-1.8m), periods build to 12-13s, and offshore wind frequency peaks at 26-27%. This combination produces the cleanest, most consistent surf of the year.
Fair Surf Season (May - August)
Winter turns up the power at Piha. Average swell sizes climb to 6ft (1.9m) and wave periods sit near 13s, with dominant SW and WSW energy wrapping into the west-facing beach. The tradeoff is a stronger westerly wind regime; ideal offshore winds drop to 19-24% of the time, leaving many days bumpy and onshore. When the wind does turn light easterly, the beach breaks light up with heavy, long-period lines.
Low Surf Season (September - January)
Spring and early summer are the least reliable months at Piha. September and October still produce serious 6ft (1.9m) swells, but offshore wind windows fall to only 14-16% as frequent Tasman Sea lows and westerly gales tear at the surface. By November and December, swell energy starts to wane toward 5ft (1.5m) with shorter periods, so surfers must pick their moments between passing fronts and summer ridges. It is rarely flat, but quality becomes a waiting game.