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Conditions at Kalapaki Beach in May
May: The South Swell Window Opens
May is when Kalapaki starts to come alive. Average open-ocean swell drops slightly to 5.9ft (1.8m) on 10.2s periods, but more importantly the SE/SSE/S/SSW window expands to its highest share of the year at 4.9%. Those south pulses arrive mostly at 3-5ft (1-1.5m) and 5-6.6ft (1.5-2m), with a touch of 6.6-8.2ft (2-2.5m) energy from the southeast - proper longboarding and even some head-high-plus on the better days.
Winds remain trade-dominated, with ENE at 42.7% and E at 24.0%, but the ideal wind share improves to 31%. Offshore N/NNW/NW flow is still uncommon at 6.8%, so you often rely on the bay's shelter from the easterly trades. Air temps rise to 24.1°C (19.9-27.5°C), water to 24.9°C, and precipitation drops to 1.60 mm/day. May is the first month where you can plan a session with moderate confidence.
Average Spot conditions at Kalapaki Beach in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Kalapaki 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 Kalapaki Beach for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kalapaki 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 Kalapaki Beach.