If you want to make contact with fellow sailors Facebook is fairly active and up to date, often used to check conditions and arrange meetings on a daily basis.
New Zealand
https://www.facebook.com/groups/windsurfingnz/
Auckland
https://www.facebook.com/groups/219068194128/ https://www.facebook.com/groups/1031714700196583/
Taranaki
https://www.facebook.com/taranaki.windsurfclub
Bay of Plenty (Tauranga/Mt Maunganui)
https://www.facebook.com/Bay-of-Plenty-Windsurfers-161610003899780
Wellington
https://www.facebook.com/groups/339401247242/ https://www.facebook.com/groups/179190588936203/
Nelson
https://www.facebook.com/groups/247434278675737/
Christchurch
https://www.facebook.com/Canterbury-Windsports-Association-404796356412
https://www.facebook.com/groups/groundswellnz
Dunedin
https://www.facebook.com/Dunedin-Windsports-Association-131344916898137
Southern Lakes (Queenstown/Wanaka) https://www.facebook.com/QueenstownWindsurfAndKitesurfClub