... I've been to nam 6 times, gone from one end to the other but usually end up staying in Mui Ne for the kiting. We've gone in off season and on season and inbetween times and Feb has the best winds usually but end of Nov was our pick as it was windy but quieter on the tourist, especially the Russians.
Phan Rang is more than 45 minutes north from Mui Ne, usually took us 2 hours on a bus, unless were talking about a different Phan Rang. We got wind every time we were there, most of us lit on small kites with monster swell out the back. If you braved the reef break you could find yourself amongst some double over heads or stay on the inside for speed runs a 5km run of concrete flat water. Locals are very poor here so unfortunately you got to watch your stuff on the beach.
Nah Trang is ok but hit and miss for wind and can be rough too, better off heading back to Mui Ne. Danang (Chin Beach) or Hoi-an (Cudi Beach) is good but again, hit and miss for wind and water conditions, although we jagged it and had a great time, prefer what Mui Ne has to offer for over all kiting and holiday stuff.
I reckon you should stay some where in Mui Ne, find a nice hotel your budget can handle on the mid to western end of the beach where you can kite out the front of your hotel or hire a motor bike then have fun riding to the surf beach as suggested above. The fishing village has a beach with some nice big shore dumping waves, most people called it Cemetary's and I think others call it Malibu due to the name of a big hotel in the middle. I found the waves smaller at the Malibu end of the beach, with some 3m dumpers at the other end. Not sure if Nomads (French guys run the place during the kite season) is still there but you can store your stuff at his place for a fee, easier to do that than carry your gear every day.
Vietnam is so dynamic so it changes constantly, every year we've gone its been different so just go and wing it and have some fun discovering it for yourself. Not the ultimate place for kiting but the people, food and affordability make up for it.
Good info here:
www.adambray.com and
www.adambray.comkitesurfing.htmcheers,
Robbie