You'll find really epic surf locations oveer there, and escpecially in the national park there's a handful of waves all around there. -i'd suggest you be selective as the swell forcast there is on and all the local surfers may not appreciate you getting on the better spots. -U may end up with 4 flat tyres on your ride home...

If you want some goo flat water head out the 7 mile beach (4wd req.) it's shallow til about the 200m line. But in and out of Lincon you'll find a heap of beachies, lone pine area there's some good wave spots. A spit somewhere near elliston which is meant to be epic..
Get onto this dude-
Easto's X-Treme Kites
3 Picardy Place
Port Lincoln 5606
Mob 0402 842 944 Surf Kites
He'll definetley know the better spots to check out, he may even be running somthing down that way over easter.-Good bloke too!
Good luck!