Aberdaron Wind Statistics, Autumn averages since 2006
The figure illustrates how commonly and how strongly the wind blows from different directions through a typical northern hemisphere autumn. The longest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with dark blue showing the strongest winds. It is based on 7249 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Aberdaron, located 36 km away (22 miles). There are insufficient recording stations world wide to use actual wind data. Invevitably some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the prevailing wind at Aberdaron 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 Aberdaron. 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 northern hemisphere autumn, the model suggests that winds are light enough for the sea to be glassy (pale blue) about 7% of the time (6 days each northern hemisphere autumn) and blows offshore 14% of the time (0 days in an average northern hemisphere autumn). During a typical northern hemisphere autumn winds stronger than >40kph (25mph) are expected on 12 days at Aberdaron
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.