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Birsay Bay Wind Stats

Wind Stats

(% offshore)
Birsay bay.wind.statistics.mayWnw.animatedWnw.label.animated

All Swells

(any wind direction)

The rose diagram describes how commonly and how strongly the wind blows from different directions over a normal May. The largest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with the strongest winds shown by the darkest shade of blue. It is based on 3440 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Birsay Bay, located 17 km away (11 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 Birsay Bay blows from the WNW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Birsay Bay. On the other hand, dominant spokes illustrate favoured directions, and the more the darkest shade of blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical May, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 5% of the time (2 days each May) and blows offshore 30% of the time (9 days in an average May). Over an average May winds stronger than >40kph (25mph) are expected on 2 days at Birsay Bay

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Also see Birsay Bay surf stats

Compare Birsay Bay with another surf break