St Martin Wind Stats

The rose diagram shows how commonly and how strongly the wind blows from different directions through a typical September. The longest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with the strongest winds shown by dark blue. It is based on 3360 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to St Martin, located 42 km away (26 miles). There are not enough 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 St Martin blows from the SSE. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at St Martin. By contrast, dominant spokes show favoured directions, and the more dark blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average September, the model suggests that winds are light enough for the sea to be glassy (light blue) about 5% of the time (2 days each September) and blows offshore 13% of the time (4 days in an average September). In a typical September wind stronger than >40kph (25mph) was predicted for only a single days at St Martin

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