Ala Moana Wind Statistics, Spring averages since 2006
The graph shows how commonly and how strongly the wind blows from different directions through a typical southern hemisphere spring. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with the strongest winds shown by dark blue. It is based on 7252 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Ala Moana, located 39 km away (24 miles). There are not enough 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 dominant wind at Ala Moana blows from the SSW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Ala Moana. Converseley, 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 southern hemisphere spring, the model suggests that winds are light enough for the sea to be glassy (light blue) about 3% of the time (3 days each southern hemisphere spring) and blows offshore just 3% of the time (3 days in an average southern hemisphere spring). During a typical southern hemisphere spring winds exceeding >40kph (25mph) are not expected, but 3 have winds on the range 30-40 (19-25) at Ala Moana
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.