Mandiri Wind Statistics, January averages since 2006
The rose diagram describes how often and how strongly the wind blows from different directions over a normal January. The largest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with deep blue strongest. It is based on 2124 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Mandiri, located 28 km away (17 miles). There are too few 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 prevailing wind at Mandiri blows from the SSW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Mandiri. By contrast, dominant spokes represent 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 January, the model suggests that winds are light enough for the sea to be glassy (pale blue) about 22% of the time (7 days each January) and blows offshore 25% of the time (8 days in an average January). Over an average January winds exceeding >40kph (25mph) are not expected, but 2 have winds on the range 30-40 (19-25) at Mandiri
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.