Sydney is a big place with lots of beaches!
Probably best narrowing it down to Northern Beaches (Manly) Eastern Beaches (Bondi) or Southern Beaches (Cronulla)
Being Summer we’ve been getting plenty of wind, mostly afternoon NE and we’ve had the odd big southerly come through.
If you can wing, parawing, dw, prone, sup you’ll be spoilt for choice.
There’s also a race on mid February @JoshKu has posted about it here
https://www.instagram.com/p/DTyvFpaEhFk/?utm_source=ig_web_copy_link&igsh=NTc4MTIwNjQ2YQ==