Barrinha Wind Statistics, August averages since 2006
The rose diagram illustrates how commonly and how strongly the wind blows from different directions over a normal August. The largest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with deep blue showing the strongest winds. It is based on 1984 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Barrinha, located 35 km away (22 miles). There are insufficient recording stations world wide to use actual wind data. Invevitably some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the most common wind at Barrinha blows from the SSE. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Barrinha. By contrast, dominant spokes represent favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical August, the model suggests that winds are light enough for the sea to be glassy (light blue) about 6% of the time (2 days each August) and blows offshore 24% of the time (7 days in an average August). Over an average August winds exceeding >40kph (25mph) are not expected, but 3 have winds on the range 30-40 (19-25) at Barrinha
IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.