This picture illustrates how commonly and how strongly the wind blows from different directions through a typical southern hemisphere autumn. The largest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with the strongest winds shown by dark blue. It is based on 4858 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Punta San Lorenzo, located 26 km away (16 miles). There are too few recording stations world wide to use actual wind data. Without question some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the dominant wind at Punta San Lorenzo blows from the W. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Punta San Lorenzo. On the other hand, dominant spokes illustrate favoured directions, and the more dark blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average southern hemisphere autumn, the model suggests that winds are light enough for the sea to be glassy (light blue) about 0.6% of the time (1 days each southern hemisphere autumn) and blows offshore just 1.2% of the time (1 days in an average southern hemisphere autumn). In a typical southern hemisphere autumn winds exceeding >40kph (25mph) are not expected, but 0 have winds on the range 30-40 (19-25) at Punta San Lorenzo
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.