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Conditions at Haast Beach in December
December: Summer's Waiting Game
December marks the official start of summer and the low point in the surf calendar at Haast Beach. The average wave height drops to 3.9ft (1.2m), the period falls to 10.4s - the shortest of the year - and the ideal wind percentage stays at just 22%. Interestingly, the swell direction from the optimum WNW/NW/NNW sector is actually strong (22.8%, 14.9%, and 13.5% respectively), but those shorter periods mean less power and more vulnerability to the strengthening NE/ENE sea breezes that dominate during the day. W swell still leads at 38%, while WSW has faded to 7%. Most waves are in the 1.5-3ft (0.5-1m) and 3-5ft (1-1.5m) ranges, with only occasional 5-6.5ft (1.5-2m) pulses. Water temp is a pleasant 14.6°C, air temps average 12.3°C, and rainfall is at its highest in December at 7.24 mm/day. Summer swells are possible, but you need to be ready to pounce on the first clean day after a low-pressure system drifts across the Tasman.
Average Spot conditions at Haast Beach in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Haast Beach 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 Haast Beach for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Haast Beach 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 Haast Beach.