This picture describes how commonly and how strongly the wind blows from different directions over a normal September. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with deep blue showing the strongest winds. It is based on 1680 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to El Porto Beach, located 46 km away (29 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 most common wind at El Porto Beach blows from the SW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at El Porto Beach. Converseley, dominant spokes represent favoured directions, and the more dark blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical September, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 38% of the time (11 days each September) and blows offshore 43% of the time (13 days in an average September). Over an average September winds exceeding >40kph (25mph) are not expected, but 0 have winds on the range 30-40 (19-25) at El Porto Beach
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.