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Unawatuna Wind Statistics, January averages since 2006

This chart describes how commonly and how strongly the wind blows from different directions over a normal January. 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 showing the strongest winds. It is based on 2620 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Unawatuna, located 27 km away (17 miles). There are insufficient 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 most common wind at Unawatuna blows from the SSW. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Unawatuna. On the other hand, dominant spokes illustrate favoured directions, and the more deep 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 (the lightest shade of blue) about 48% of the time (15 days each January) and blows offshore 69% of the time (1 days in an average January). Over an average January winds exceeding >40kph (25mph) are not expected, but 0 have winds on the range 30-40 (19-25) at Unawatuna

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.