Unawatuna Wind Stats

This picture describes how commonly and how strongly the wind blows from different directions over a normal July. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with the darkest shade of blue strongest. It is based on 3472 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Unawatuna, located 27 km away (17 miles). There are not enough 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 prevailing wind at Unawatuna blows from the SSW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Unawatuna. On the other hand, dominant spokes represent favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical July, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 1.0% of the time (0 days each July) and blows offshore just 74% of the time (23 days in an average July). Over an average July winds exceeding >40kph (25mph) are not expected, but 5 have winds on the range 30-40 (19-25) at Unawatuna

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