Arpoador Wind Statistics, August averages since 2006
This image shows how often and how strongly the wind blows from different directions through a typical August. The longest 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 2480 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Arpoador, located 21 km away (13 miles). There are too few recording stations world wide to use actual wind data. No doubt some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the dominant wind at Arpoador blows from the SSE. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Arpoador. Converseley, dominant spokes show favoured directions, and the more dark blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average August, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 22% of the time (7 days each August) and blows offshore 61% of the time (10 days in an average August). In a typical August winds exceeding >40kph (25mph) are not expected, but 0 have winds on the range 30-40 (19-25) at Arpoador
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.