This chart shows how frequently and how strongly the wind blows from different directions through a typical May. The longest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with the strongest winds shown by dark blue. It is based on 1488 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to L Jetty, located 22 km away (14 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 dominant wind at L Jetty blows from the ESE. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at L Jetty. On the other hand, 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. Over an average May, the model suggests that winds are light enough for the sea to be glassy (pale blue) about 10% of the time (3 days each May) and blows offshore 31% of the time (9 days in an average May). In a typical May winds exceeding >40kph (25mph) are not expected, but 2 have winds on the range 30-40 (19-25) at L Jetty
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.