flatwater spots:
Augusta in the river mouth. A sandbank builds a little lagoon.
Denmark inlet as well where the inlet meets the ocean (depending on tide) or in the ocan for good waves (beautyful beach)
shoal Bay near Albany if your´re lucky an there is enough wind.
Australind inlet
And don´t miss Cape le Grand national Park. Beautyful and you can drive on the beach with a 2wd at Lucky Bay and Cape Le Grand Beach and kite. And climb up Frenchmans Peak. Great adventure.
That are my experiences as i had been on this trip for 2 weeks x-mas - near year
I can confirm, definitely Denmark river mouth! Take a left turn in Denmark after Caltex to the City Beach road and go to the end if it. At the end there is a local Surf club, take your kite to the beach and walk left to the river mouth. Otherwise, you will need to cross the river somewhere, depending on tide.
It's a great run, with constant wind 20-25 knots. Absolutely great...
No to mention the Green pool with family to relax after a good session!
Cheers