Conditions at Piha in December
December: Summer Sizing Returns
December signals the return to lighter, more summer-like surf. Average swell drops to 5ft (1.5m) with the shortest average period of the year at 11.7s, though still in the long-period range. The swell direction remains overwhelmingly favorable-SW 41.7% and WSW 34.2%-but wave heights cluster mostly in the 3-5ft (1-1.5m) range, with fewer 5-8ft (1.5-2.5m) sets. Offshore wind frequency ticks up slightly to 17%, and when the afternoon seabreeze is light or the high pressure is in charge, Piha turns into a fun, rippable summer beach. Water temp rises to 19.0°C and air temps average 17.9°C, setting up long summer sessions.
Average Spot conditions at Piha in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Piha during December. 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 Piha for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Piha for December. 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 Piha.