Conditions at Sao Juliao in April
April: Spring Consistency, Building Wind
April sees average wave heights ease to 2.0m (6.5ft) while the period drops to 11.1s, so the swell becomes punchy but less powerful than deep winter. The direction distribution is excellent for Sao Juliao - NW (28.0%), WNW (21.3%), and NNW (20.0%) combine for nearly 70% of the total, with W adding another 6.4%. The catch is wind: NNW winds blow an imposing 28.6% of the time, and when combined with N (9.8%) and NW (9.6%) the north/northwest flow dominates the coast. Ideal offshore winds from the east/southeast fall to only 12% of the time, often during early morning or high-pressure pre-frontal spells. This is the month where dawn patrol is king; the waves are still fun and the water temp climbs to 15.7°C, but expect afternoon onshore sea-breezes to chop up what the morning glass gave you. Average air temp is 14.7°C and rainfall is moderate at 1.88 mm/day.
Average Spot conditions at Sao Juliao in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Sao Juliao 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 Sao Juliao for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sao Juliao 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 Sao Juliao.