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Conditions at Rottnest Island in March
March: Autumn Approaches and the Period Lengthens
March marks the first real sign of transition. The average swell height remains 6ft (1.8m), but the period lengthens to 12.4s as the Southern Ocean starts waking up from its summer slumber. SW dominates at 50.3%, with SSW adding 27.7%, and there is a slightly larger WSW component worth noting. Wind conditions are still poor overall - S and SSW winds total 36.2%, and the ideal offshore N/NW window only accounts for 6% - but the overall wind strengths begin to ease compared to January. Rain is still minimal at 0.66 mm/day, air temperature averages 22.4°C, and the water is at its warmest for the year at 22.4°C. This month is really about patience. The swell quality improves as period pushes into the powerful long-period range, and any day with a morning offshore breeze can deliver surprisingly clean, rippable waves until the seabreeze kicks in.
Average Spot conditions at Rottnest Island in March
Swell history for March
Wind history for March
Swell quality
Analyze the groundswell consistency at Rottnest Island 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 Rottnest Island for your next trip in March.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rottnest Island 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 Rottnest Island.