Hello everybody! 
Thanks a lot for your replies! :-)
First of all: Yes, I'm a windsurfer! But I also want to start surfing. (I just tried last year in Brazil). In English it's a little bit confusing with the word "surfing" (In German you have two words so you can differentiate it better.) How do you differentiate it? WINDsurfing and surfing

...Difficult
@sharkbiscuit (cool nick :-D)I will need both: windsurfing and surfing stuff. The last is easier to find and buy. So thats not the big problem. But getting the hole equipment for windsurfing...

@BoardonlineOf course I'm planning to surf as most as possible, because in Austria - in my homecity Graz I couldn't surf a lot in the last few years (next "good" surfspot is two hours by car and I didn't have one) and now I want to get better and to surf so much until I don't have any more power.

My stuff in Austria consists of F2 style 260 with 109 liters (2004) and JP Freestyle-Wave with 82 liters(2001). But mostly I surfed the bigger one. Now I have sold it, because I want to start with little boards and because I'm not in Austria for 6-12 months.
And sails I have mostly used my Neilpryde Raf Jet with 5,9m² and NP Zone with 5,0m², rarely my NP zone with 4,1m².
I'm thinking over it to take my sails (5,0 and 4,1) and maybe my boom to Australia - but firstly I have to check how much that would cost with Air New Zealand.
My problem will be - how to come to the beaches!? I don't know if I can use my uncles car - I rarely know him at the moment.

Actually I wanted to work in Australia and then it wouldn't be a problem to buy stuff and a car! But because of the difficulties to get a longstay visa and further on a job or working experience I just can visit Australia and New Zealand and look there hopefully for a job through working experiences.
@tonto"Summer Surf Bus" - does it exists? Where could I find them? It sounds good. Is it only for surfers or also for windsurfers?
And last but not least @divaldoTHANKS a lot for your good tipps! That helps me a lot!

That would be very great and nice from you if you can take me to the spots!!

Naturally I will share the fare with you!
I don't know if it helps you. I'll live in "Klemzig" directly in Adelaide. At this moment I don't have a "feeling" for the size of Adelaide (or Australia). But I have heard and read a few thinks that it should be very big and long distances (Not like in Austria were you can drive through the country in 8 hours by car

). So I hope it is possible to get around in Adelaide in one/two hours?!
Your windsurfing community in Adelaide is closed? Are you meeting together or other things? Because of the unpopularity of windsurfing in Austria we have not really such a community! :-( What a pity!
I'm arriving on 5th of November then I will look for you and further on for surf trips! :-)
Thank you guys!
Hang loose, Luise
Hopefully to meet some of you!