Spessard Holland Wind Statistics, All Year averages since 2006
The rose diagram shows how often and how strongly the wind blows from different directions through a typical year. 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 21628 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Spessard Holland, located 8 km away (5 miles). There are insufficient 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 Spessard Holland blows from the E. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Spessard Holland. By contrast, dominant spokes show favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average year, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 14% of the time (51 days each year) and blows offshore 35% of the time (77 days in an average year). In a typical year winds stronger than >40kph (25mph) are expected on 3 days at Spessard Holland
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.