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Conditions at Haast Beach in August
August: Cold, Consistent Power
August continues the winter theme with only a slight step back in wind consistency - ideal wind drops to 45%, still far better than summer. The average wave height is 4.5ft (1.4m), and the average period peaks at 11.6s, the highest of the year. W swells account for 34%, WSW for 16%, while WNW (18%), NNW (12%), and NW (11%) keep the beach well exposed to favorable swell. The most notable change is that a higher percentage of the W and WNW swells reach 5-6.5ft (1.5-2m) and 6.5-8ft (2-2.5m), so the raw size is more substantial. Wind is split between WSW (13%), ENE (13%), and SE (9%), meaning there are fewer all-day offshore sessions than July but plenty of clean, wind-shadowed windows. Water temp now sits at its annual minimum of 12.1°C, air temp averages 6.8°C, and rain is 6.17 mm/day. Anytime a high-pressure system moves in behind a front, August will hand you some of the best waves of the winter.
Average Spot conditions at Haast Beach in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Haast Beach during August. 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 August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Haast Beach for August. 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.