Statistiques de Vent de Aberystwyth harbour trap, moyennes sur Printemps depuis 2006
This picture describes how frequently and how strongly the wind blows from different directions over a normal northern hemisphere spring. The largest 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 6577 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Aberystwyth harbour trap, located 29 km away (18 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 Aberystwyth harbour trap 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 Aberystwyth harbour trap. By contrast, dominant spokes illustrate favoured directions, and the more the darkest shade of blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical northern hemisphere spring, the model suggests that winds are light enough for the sea to be glassy (light blue) about 9% of the time (8 days each northern hemisphere spring) and blows offshore 23% of the time (1 days in an average northern hemisphere spring). Over an average northern hemisphere spring winds stronger than >40kph (25mph) are expected on 5 days at Aberystwyth harbour trap
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.