Updated to 2017: mean speeds in kph.
Kaukau Top 40.6
Southwest Cape 38.1
Brothers 37.5
Baring Head 35.0
Cape Turnagain 34.7
Castlepoint 30.6
And for a contrast - Clyde 6.2 (calmest recorded month 2.2) - there are probably sites with even lower averages.
Sample windspeed averages at some windy locations
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These topics are a read-only archive and may be subject to out-of-date information.
For today's weather discussion head to: New Zealand Weather & Climate