Ranganunu Harbour Wind Stats

The rose diagram describes how often and how strongly the wind blows from different directions through a typical June. The largest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with the darkest shade of blue showing the strongest winds. It is based on 3506 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Ranganunu Harbour, located 49 km away (30 miles). There are insufficient 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 prevailing wind at Ranganunu Harbour blows from the NE. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Ranganunu Harbour. 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 June, the model suggests that winds are light enough for the sea to be glassy (pale blue) about 0.6% of the time (0 days each June) and blows offshore just 6% of the time (2 days in an average June). During a typical June winds stronger than >40kph (25mph) are expected on 3 days at Ranganunu Harbour

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