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Conditions at Haast Beach in May
May: The Southern Ocean Wakes Up
By May, the winter engine is starting to fire. Average wave height rises to 4.5ft (1.4m), the period holds at 11.5s, and ideal wind conditions jump to 39% of the time. This is a significant shift from the summer months. W-direction swell still leads at 36%, but WSW (21.5%) and WNW (14.9%) add plenty of juice, and the NW/NNW directions contribute another 20%. The height distribution shows a real upgrade: 7.7% of all observations are in the 5-6.5ft (1.5-2m) class and 3.7% are in the 6.5-8ft (2-2.5m) range. With offshore windows from WSW/SW/SSW/S now much more common, the beach frequently gets groomed by cross-offshore winds that hold the walls open. Water temp drops to 13.9°C, air temp averages 9.0°C, and storms refresh the surf every few days. May is when you start booking time off work.
Average Spot conditions at Haast Beach in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Haast Beach during May. 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 May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Haast Beach for May. 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.