La Roche Percee (Bonhomme de Bourail) Wind Stats

The rose diagram shows how frequently and how strongly the wind blows from different directions over a normal July. The longest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with dark blue showing the strongest winds. It is based on 3472 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to La Roche Percee (Bonhomme de Bourail), located 44 km away (27 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 most common wind at La Roche Percee (Bonhomme de Bourail) 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 La Roche Percee (Bonhomme de Bourail). By contrast, dominant spokes show 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 (pale blue) about 12% of the time (4 days each July) and blows offshore 27% of the time (6 days in an average July). Over an average July winds exceeding >40kph (25mph) are not expected, but 4 have winds on the range 30-40 (19-25) at La Roche Percee (Bonhomme de Bourail)

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