The rose diagram shows how commonly and how strongly the wind blows from different directions over a normal May. The biggest 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 1734 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Banana Beach, located 38 km away (24 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 most common wind at Banana Beach blows from the SSW. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Banana Beach. By contrast, dominant spokes show 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 May, the model suggests that winds are light enough for the sea to be glassy (light blue) about 10% of the time (3 days each May) and blows offshore 26% of the time (7 days in an average May). Over an average May winds stronger than >40kph (25mph) are expected on 2 days at Banana Beach
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.