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Conditions at Grumari in January
January: The Summer Trade Wind Grind
January is peak austral summer at Grumari, and the numbers paint a picture of small, trade-wind-strewn surf. Average wave height drops to 3ft (0.9m) and period to 9.6s, right on the cusp of average-period, punchy, rideable surf. The swell direction wheel is overwhelmingly favorable: SSE (28.7%), S (27.9%), SE (22.2%) and ESE (16.8%) combine for more than 90% of incoming energy, but most of it is short-period, sub-3ft (sub-1m) windswell. The dominant winds are the easterly trades, with ENE (11.8%), NE (11.2%), NNE (10.3%) and E (10.2%) leading the way. That keeps surfaces bumpy and forces you to search out the 44% of ideal wind windows that are clean. Expect 3ft (0.9m) peaks, the occasional chest-shoulder-high S pulse, summer rain at 6.92 mm/day, and water temperature near 22.5°C.
Average Spot conditions at Grumari in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Grumari during January. 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 January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Grumari for January. 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.