The figure illustrates how frequently and how strongly the wind blows from different directions through a typical year. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with deep blue showing the strongest winds. It is based on 20068 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Topleca, located 26 km away (16 miles). There are too few 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 Topleca blows from the SSW. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Topleca. On the other hand, 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 year, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 36% of the time (131 days each year) and blows offshore 51% of the time (186 days in an average year). During a typical year wind stronger than >40kph (25mph) was forecast for only a single days at Topleca
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.