Conditions at Rosa in August
August: Bigger Swell, Fickler Wind
August sees the average swell height jump to 4-5ft (1.4m), the biggest of the winter months, with the average period holding at 9.2s. The direction mix shifts east again: ENE (20%), E (19%), ESE (15%), SE (14%), SSE (13%) and S (13%). Notably, the percentage of 1.5-2m (5-6ft) waves increases across almost every eastern and southern direction, and 2-2.5m (6-8ft) waves become a regular feature from S and SE.
Wind quality becomes a bit more challenging, with ideal conditions down to 42%. NNE (28%) is the dominant wind and often blows 20-30kph, putting a cap on consistency. Yet SSW (12%) and SW (11%) still show up with enough frequency to offer clean windows, especially after frontal passages. Water temperature bottoms out near 17.4°C, air averages 15.9°C, and precipitation is the lowest of the year at 2.96 mm/day. August is about trading some wind quality for extra size.
Average Spot conditions at Rosa in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Rosa during August. 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 August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rosa for August. 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.