Conditions at Rosa in March
March: Autumn Begins to Stir the South Atlantic
March marks the first real transition out of summer. The average period ticks up to 8.6s and the average swell height holds at 4ft (1.2m), but the direction mix gets more SE-consistent: ESE (29%), E (23%), SE (21%) and SSE (13%). The 1-1.5m (3-5ft) range still dominates, but the percentage of 1.5-2m (5-6ft) waves from ESE and SE grows, hinting at the approaching winter swell machine.
The wind improves slightly, with ideal conditions 32% of the time. NNE (20%) and NE (16%) still dominate, but SSW (9%) and SW (7%) are becoming more common, offering occasional clean windows. Water temperature cools to 24.9°C, air averages 22.8°C, and rainfall drops to 4.65 mm/day. March can surprise - on the right day, Rosa starts to feel like a proper autumn wave.
Average Spot conditions at Rosa in March
Swell history for March
Wind history for March
Swell quality
Analyze the groundswell consistency at Rosa during March. 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 Rosa for your next trip in March.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rosa for March. 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 Rosa.