The rose diagram describes how often and how strongly the wind blows from different directions through a typical June. The largest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with the darkest shade of blue showing the strongest winds. It is based on 1594 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Aberta A Nova, located 27 km away (17 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 prevailing wind at Aberta A Nova blows from the WNW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Aberta A Nova. On the other hand, dominant spokes represent favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average June, the model suggests that winds are light enough for the sea to be glassy (light blue) about 4% of the time (1 days each June) and blows offshore just 5% of the time (1 days in an average June). In a typical June winds exceeding >40kph (25mph) are not expected, but 2 have winds on the range 30-40 (19-25) at Aberta A Nova
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.