This picture illustrates how often and how strongly the wind blows from different directions over a normal January. The longest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with deep blue strongest. It is based on 1728 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Mazagon or Casas de Bonares, located 23 km away (14 miles). There are insufficient 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 Mazagon or Casas de Bonares blows from the WSW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Mazagon or Casas de Bonares. 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. During a typical January, the model suggests that winds are light enough for the sea to be glassy (pale blue) about 12% of the time (4 days each January) and blows offshore 28% of the time (3 days in an average January). Over an average January wind stronger than >40kph (25mph) was expected for only a single days at Mazagon or Casas de Bonares
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.