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Assinie • Statistics for May

Conditions at Assinie in May

May: More Size, More Variables

May is one of the more interesting months in the annual cycle. The average swell height jumps to around 4ft (1.2m) and the period reaches 11.7s, the strongest combination of the year so far. A huge 80% of the swell arrives from S, with 19.7% from SSW, and the height distribution is packed into the 3-5ft (1-1.5m) range, plus 2.7% in the 5-6.5ft (1.5-2m) class and even a hint of 6.5-8ft (2-2.5m). For a beachbreak that does not need much size to get fun, this is real potential.

Ideal wind rebounds to 6%, and the wind field becomes more mixed, with S, SSE and SE influences blending in with the dominant SSW/SW flow. Still, onshore directions control most of the month. Rain peaks at 7.71mm/day, water temperature is a warm 28.5°C and air temperature sits at 27.2°C. With long-period S/SSW groundswell and a better chance of lighter wind than in June-August, May can dish out some of the best spring waves if you are in the right place at the right time.

Average Spot conditions at Assinie in May

Swell history for May

0 - 2
2 - 3
3 - 5
5 - 6
6 - 8
> 8 ft

Wind history for May

0 - 6.2
6.3 - 12.4
12.4 - 18.6
18.6 - 24.9
24.9 - 31.1
> 31.1 mph

Swell quality

Analyze the groundswell consistency at Assinie 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 Assinie for your next trip in May.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Assinie 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 Assinie.

Swell with good wind

Swell with good wind by size

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