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Conditions at Chesterman Beach in May
May: Summer Onshore Flow Arrives
By May, Chesterman settles into a smaller, wind-prone pattern. Average swell height drops to 1.5m (4.9ft) and the period is 11.7s - fun when it is clean, but the ocean is increasingly dominated by onshore WNW winds, which blow a huge percentage of the time. The swell direction is still mostly WSW to W, which is the beach's bread and butter, but the average size is now in the 3-5ft (1-1.5m) range and ideal surfing wind has fallen to just 14%. Air temps warm to 10.5°C, water temp climbs to 12.0°C, and rainfall drops to 2.71mm/day. Early mornings and inside sandbar peaks become the best bet for smooth, rideable waves.
Average Spot conditions at Chesterman Beach in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Chesterman 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 Chesterman Beach for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Chesterman 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 Chesterman Beach.