Conditions at Foz in May
May: Spring Lull and Shoulder-High Waves
May is a fair month at Foz, with average swell heights down to 1.0m (3.3ft) and periods averaging 9.7s. The wave rose remains NW-friendly - NNW (36%) and NW (33%) are the headline acts - but most of that energy is smaller and shorter-period than in winter. It is the kind of surf that keeps a shortboard honest but rarely offers a heavy, pumping session. Onshore winds become more persistent: NE (18%) and ENE (16%) dominate, while SSW/SW together drop to 18%; ideal conditions occur only 31% of the time. The good news is that water temp rises to 14.8°C and air averages 12.9°C, so spring suits and thinner wetsuits become possible. If a late-season low sends a 10s NW groundswell and the SW breeze is blowing, Foz can still turn on.
Average Spot conditions at Foz in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Foz 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 Foz for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Foz 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 Foz.