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Conditions at Grumari in April
April: Autumn Groundswell Gets a Gear
April marks the real onset of autumn groundswell at Grumari. Average wave height jumps to 4ft (1.2m) with a 10.6s period, and the direction distribution is pure gold: S 35.2%, SSE 34.2%, SE 20.4%, with a growing SSW component at 5.4%. The majority of waves are now in the 3-5ft (1-1.5m) range, and S/SSW swells add meaningful 5-6.5ft (1.5-2m) sets, plus a small 6.5-8ft (2-2.5m) contribution from S. The wind story is more mixed: E and ENE trades are still present, but SW (8.7%) and WSW (6.0%) winds appear more often, and ideal conditions occur 43% of the time. With precipitation down to 3.50 mm/day and water temperature still warm at 23.8°C, this is one of the best fair-weather surf months.
Average Spot conditions at Grumari in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Grumari during April. 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 April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Grumari for April. 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.