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Conditions at Grumari in May
May: The South Atlantic Roars to Life
May is when Grumari truly wakes up. Swell averages 4.3ft (1.3m) with an 11.0s period, and the direction distribution is heavily weighted toward S (41.2%) and SSE (26.0%), with SE (15.6%) and SSW (9.9%) filling in the window. Large chunks of the S and SSE energy fall in the 3-5ft and 5-6.5ft ranges, and SSW contributes a serious slice of 6.5-8ft (2-2.5m) swell. This is proper long-period groundswell, the kind that produces clean, rippable walls on the sandbar if you catch the wind right. The wind regime begins to split between NE trades and SW/WSW flow, and offshore NNW/N winds help push ideal wind to 49%. Daily rain drops to 2.45 mm, air temperatures cool to 21.9°C, and water temperature is still comfortable at 23.2°C.
Average Spot conditions at Grumari in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Grumari 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 Grumari for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Grumari 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 Grumari.